/* ==========================================================================
   ImpMach CNC — 静态站样式
   配色沿用品牌规范：主色 #467ff7 / 辅助 #7699af / 强调 #d61e1e
   ========================================================================== */

:root {
  --im-blue: #467ff7;
  --im-blue-dark: #2f63d4;
  --im-slate: #7699af;
  --im-red: #d61e1e;
  --im-ink: #0d1218;
  --im-body: #46535f;
  --im-line: #e3e9f0;
  --im-bg: #ffffff;
  --im-bg-soft: #f5f8fc;
  --im-bg-dark: #10161f;
  --im-radius: 10px;
  --im-shadow: 0 10px 30px rgba(13, 18, 24, .08);
  --im-shadow-lg: 0 18px 46px rgba(13, 18, 24, .14);
  --im-wrap: 1200px;
  --im-font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--im-font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--im-body);
  background: var(--im-bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--im-blue); text-decoration: none; }
a:hover { color: var(--im-blue-dark); }

h1, h2, h3, h4, h5, h6 {
  color: var(--im-ink);
  line-height: 1.25;
  margin: 0 0 .6em;
  font-weight: 700;
  letter-spacing: -.005em;
}

h1 { font-size: clamp(2rem, 4.4vw, 3.35rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.35rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1.1em; }

.im-wrap { width: min(100% - 40px, var(--im-wrap)); margin-inline: auto; }
.im-section { padding: 84px 0; }
.im-section--soft { background: var(--im-bg-soft); }
.im-section--dark { background: var(--im-bg-dark); color: #c6d3e0; }
.im-section--dark h2, .im-section--dark h3 { color: #fff; }

.im-eyebrow {
  display: inline-block;
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--im-blue);
  margin-bottom: 12px;
}

.im-section-head { max-width: 760px; margin-bottom: 46px; }
.im-section-head--center { margin-inline: auto; text-align: center; }
.im-section-head p { margin-bottom: 0; }
.im-lede { font-size: 1.06rem; }

/* ---------- 按钮 ---------- */
.im-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border-radius: 6px;
  font-weight: 600;
  font-size: .95rem;
  font-family: inherit;
  line-height: 1.2;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease;
}
.im-btn:hover { transform: translateY(-2px); }
.im-btn--primary { background: var(--im-blue); color: #fff; }
.im-btn--primary:hover { background: var(--im-blue-dark); color: #fff; }
.im-btn--ghost { border-color: rgba(255,255,255,.55); color: #fff; }
.im-btn--ghost:hover { background: #fff; color: var(--im-ink); }
.im-btn--outline { border-color: var(--im-line); color: var(--im-ink); background: #fff; }
.im-btn--outline:hover { border-color: var(--im-blue); color: var(--im-blue); }
.im-btn--sm { padding: 10px 18px; font-size: .88rem; }
.im-btn[disabled] { opacity: .6; cursor: not-allowed; transform: none; }

/* ---------- 顶部信息条 ---------- */
.im-topbar { background: var(--im-ink); color: #a9bdd0; font-size: .84rem; }
.im-topbar .im-wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between; min-height: 42px; }
.im-topbar a { color: #d7e3ef; }
.im-topbar a:hover { color: #fff; }
.im-topbar__list { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; padding: 0; list-style: none; align-items: center; }
.im-topbar__list li { display: flex; align-items: center; gap: 7px; }
.im-topbar svg { width: 15px; height: 15px; fill: var(--im-blue); flex: none; }

/* ---------- 页头 ---------- */
.im-header { background: #fff; box-shadow: 0 2px 14px rgba(13,18,24,.07); position: sticky; top: 0; z-index: 50; transition: box-shadow .2s ease; }
.im-header.is-stuck { box-shadow: 0 6px 22px rgba(13,18,24,.14); }
.im-header__inner { display: flex; align-items: center; gap: 26px; min-height: 84px; }

.im-brand { display: flex; align-items: center; gap: 12px; flex: none; }
.im-brand__logo { height: 52px; width: auto; display: block; }

.im-nav { margin-left: auto; }
.im-nav ul { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.im-nav li { position: relative; }
.im-nav a {
  display: block; padding: 10px 15px; color: var(--im-ink); font-weight: 600; font-size: .95rem;
  border-radius: 6px; white-space: nowrap;
}
.im-nav a:hover, .im-nav a.is-active { color: var(--im-blue); background: var(--im-bg-soft); }
.im-nav .has-children > a::after {
  content: ""; display: inline-block; width: 6px; height: 6px; margin-left: 8px;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}

/* 下拉菜单
   常见坑：用 top: calc(100% + 6px) 在链接和菜单之间留间距，会在两者之间留出
   一条既不属于 <li> 也不属于菜单的悬空带。鼠标斜向下移动经过它时掉出 :hover，
   菜单当场收起，子项点不中。

   这里的做法是把这段间距做成菜单自身的「透明内边距」：
     - top: 100%            —— 菜单紧贴 .im-nav li 的底边，不留任何缝隙
     - padding-top: 6px     —— 视觉上的 6px 间隔由内边距提供
     - background-clip: padding-box —— 背景只画在内边距以内，上方 6px 保持透明
   于是从上滑到下全程都在菜单元素内，hover 链不会中断。 */
.im-nav .sub-menu {
  position: absolute; top: 100%; left: 0;
  min-width: 236px; background: #fff;
  background-clip: padding-box;
  border: 1px solid var(--im-line); border-radius: var(--im-radius); box-shadow: var(--im-shadow);
  padding: 6px 8px 8px; display: none; flex-direction: column; gap: 2px;
}
.im-nav li:hover > .sub-menu, .im-nav li:focus-within > .sub-menu { display: flex; }
.im-nav .sub-menu a { padding: 9px 12px; font-weight: 500; }
.im-header__cta { flex: none; }

.im-burger {
  display: none; margin-left: auto; width: 44px; height: 44px;
  border: 1px solid var(--im-line); background: #fff; border-radius: 8px; cursor: pointer; padding: 0;
}
.im-burger span, .im-burger span::before, .im-burger span::after {
  display: block; width: 20px; height: 2px; background: var(--im-ink); margin-inline: auto; position: relative;
}
.im-burger span::before, .im-burger span::after { content: ""; position: absolute; left: 0; }
.im-burger span::before { top: -6px; }
.im-burger span::after { top: 6px; }

/* ---------- 首屏 ---------- */
.im-hero {
  position: relative; color: #fff; overflow: hidden;
  background: #0b1017 url("../img/pages/home-banner.156e8c121c5d.jpg") center/cover no-repeat;
}
.im-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(8,12,18,.92) 0%, rgba(8,12,18,.78) 45%, rgba(8,12,18,.42) 100%);
}
.im-hero__inner { position: relative; z-index: 2; padding: 104px 0 96px; max-width: 720px; }
.im-hero h1 { color: #fff; margin-bottom: 14px; }
.im-hero__eyebrow { font-size: .8rem; letter-spacing: .2em; text-transform: uppercase; font-weight: 700; color: #8fb4ff; margin-bottom: 18px; }
.im-hero p { font-size: 1.06rem; color: #cddbe8; margin-bottom: 26px; }
.im-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.im-hero__badges { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-top: 30px; padding: 0; list-style: none; }
.im-hero__badges li {
  display: flex; align-items: center; gap: 8px; font-size: .87rem; color: #dce7f2;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  padding: 8px 14px; border-radius: 999px;
}
.im-hero__badges svg { width: 16px; height: 16px; fill: #5ee0a0; flex: none; }

/* ---------- 栅格 ---------- */
.im-grid { display: grid; gap: 26px; }
.im-grid--4 { grid-template-columns: repeat(4, 1fr); }
.im-grid--3 { grid-template-columns: repeat(3, 1fr); }
.im-grid--2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- 产品分类卡 ---------- */
.im-cat {
  position: relative; display: flex; flex-direction: column; border-radius: var(--im-radius); overflow: hidden;
  background: #fff; border: 1px solid var(--im-line); transition: transform .2s ease, box-shadow .2s ease;
}
.im-cat:hover { transform: translateY(-4px); box-shadow: var(--im-shadow); }
.im-cat__media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--im-bg-soft); }
.im-cat__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.im-cat:hover .im-cat__media img { transform: scale(1.05); }
.im-cat__body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.im-cat__body h3 { margin-bottom: 6px; font-size: 1.12rem; color: var(--im-ink); }
.im-cat__body p { font-size: .9rem; margin-bottom: 12px; }
.im-cat__link { margin-top: auto; font-weight: 700; font-size: .88rem; display: inline-flex; align-items: center; gap: 6px; }
.im-cat__link::after { content: "→"; transition: transform .18s ease; }
.im-cat:hover .im-cat__link::after { transform: translateX(4px); }

/* ---------- 文章卡 ---------- */
.im-card { background: #fff; border: 1px solid var(--im-line); border-radius: var(--im-radius); overflow: hidden; display: flex; flex-direction: column; }
.im-card__media { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--im-bg-soft); }
.im-card__media img { width: 100%; height: 100%; object-fit: cover; }
.im-card__body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.im-card__meta { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--im-slate); font-weight: 700; margin-bottom: 8px; }
.im-card__body h3 { font-size: 1.08rem; }
.im-card__body h3 a { color: var(--im-ink); }
.im-card__body h3 a:hover { color: var(--im-blue); }
.im-card__body p { font-size: .92rem; }
.im-card__more { margin-top: auto; padding-top: 12px; font-weight: 700; font-size: .88rem; }

/* ---------- 流程 / 为什么选我们 ---------- */
.im-process { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 50px; align-items: center; }
.im-process__media img { width: 100%; border-radius: var(--im-radius); background: #fff; border: 1px solid var(--im-line); }
.im-steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.im-steps li { position: relative; padding: 0 0 22px 56px; }
.im-steps li::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 0; width: 38px; height: 38px; border-radius: 50%;
  background: var(--im-blue); color: #fff; display: grid; place-items: center; font-size: .82rem; font-weight: 700;
}
.im-steps li::after { content: ""; position: absolute; left: 18px; top: 42px; bottom: 4px; width: 2px; background: var(--im-line); }
.im-steps li:last-child { padding-bottom: 0; }
.im-steps li:last-child::after { display: none; }
.im-steps strong { display: block; color: var(--im-ink); font-size: 1rem; }
.im-steps span { font-size: .9rem; color: var(--im-slate); }

.im-why { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.im-why__item { background: #fff; border: 1px solid var(--im-line); border-left: 4px solid var(--im-blue); border-radius: 8px; padding: 24px 26px; }
.im-why__item h3 { font-size: 1.06rem; margin-bottom: 6px; }
.im-why__item p { margin: 0; font-size: .92rem; }

/* ---------- 关于我们 ---------- */
.im-about { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 50px; align-items: center; }
.im-about__media img { width: 100%; border-radius: var(--im-radius); }
.im-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 28px 0 0; padding: 0; list-style: none; }
.im-stats li { background: var(--im-bg-soft); border-radius: 8px; padding: 18px; text-align: center; }
.im-stats b { display: block; font-size: 1.6rem; color: var(--im-blue); line-height: 1.2; }
.im-stats span { font-size: .82rem; color: var(--im-slate); }

/* ---------- 产品图库 ---------- */
.im-gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.im-gallery figure { margin: 0; border: 1px solid var(--im-line); border-radius: var(--im-radius); overflow: hidden; background: #fff; transition: box-shadow .2s ease, transform .2s ease; }
.im-gallery figure:hover { box-shadow: var(--im-shadow); transform: translateY(-3px); }
.im-gallery img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; background: var(--im-bg-soft); }
.im-gallery figcaption { padding: 12px 14px; font-size: .84rem; font-weight: 600; color: var(--im-ink); line-height: 1.4; }

/* ---------- 询盘表单 ---------- */
.im-contact { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 46px; align-items: start; }
.im-contact__info { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); border-radius: var(--im-radius); padding: 30px; }
.im-contact__info h2 { color: #fff; }
.im-contact__list { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 16px; }
.im-contact__list li { display: flex; gap: 12px; align-items: flex-start; font-size: .95rem; }
.im-contact__list svg { width: 19px; height: 19px; fill: var(--im-blue); flex: none; margin-top: 3px; }
.im-contact__list a { color: #fff; }
.im-contact__list a:hover { color: #8fb4ff; }
.im-contact__list strong { display: block; color: #fff; font-size: .86rem; text-transform: uppercase; letter-spacing: .08em; }

.im-form { background: #fff; border-radius: var(--im-radius); padding: 32px; box-shadow: var(--im-shadow); }
.im-form__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.im-field { display: flex; flex-direction: column; gap: 7px; }
.im-field--full { grid-column: 1 / -1; }
.im-field label { font-size: .84rem; font-weight: 700; color: var(--im-ink); text-transform: uppercase; letter-spacing: .06em; }
.im-field input, .im-field select, .im-field textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--im-line); border-radius: 7px;
  font: inherit; font-size: .95rem; color: var(--im-ink); background: #fff;
  transition: border-color .16s ease, box-shadow .16s ease;
}
.im-field input:focus, .im-field select:focus, .im-field textarea:focus {
  outline: none; border-color: var(--im-blue); box-shadow: 0 0 0 3px rgba(70,127,247,.14);
}
.im-field textarea { min-height: 118px; resize: vertical; }
.im-field--file input { padding: 10px; border-style: dashed; }
.im-form__note { font-size: .82rem; color: var(--im-slate); margin: 14px 0 0; }
.im-form__actions { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.im-form__status { font-size: .9rem; font-weight: 600; display: none; }
.im-form__status.is-ok { display: block; color: #137a4b; }
.im-form__status.is-error { display: block; color: var(--im-red); }
.im-hp { position: absolute !important; left: -9999px !important; }

/* ---------- 内页头部 ---------- */
.im-page-hero { background: var(--im-bg-dark); color: #fff; padding: 66px 0; }
.im-page-hero h1 { color: #fff; margin-bottom: 10px; }
.im-page-hero p { color: #b8c8d8; margin: 0; max-width: 820px; }
.im-breadcrumb { font-size: .82rem; color: #8fa6ba; margin-bottom: 14px; }
.im-breadcrumb a { color: #b8c8d8; }

.im-entry { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 52px; align-items: start; }
.im-entry__body { font-size: 1.02rem; }
.im-entry__body h2 { margin-top: 1.6em; font-size: 1.55rem; }
.im-entry__body h3 { margin-top: 1.4em; font-size: 1.2rem; }
.im-entry__body h4 { margin-top: 1.3em; font-size: 1.06rem; }
.im-entry__body ul, .im-entry__body ol { padding-left: 1.25em; }
.im-entry__body li { margin-bottom: .5em; }
.im-entry__body img { border-radius: var(--im-radius); margin: 1.4em 0; }
.im-entry__hero { border-radius: var(--im-radius); margin-bottom: 30px; width: 100%; }
.im-entry__body blockquote {
  margin: 1.6em 0; padding: 18px 24px; background: var(--im-bg-soft);
  border-left: 4px solid var(--im-blue); border-radius: 0 8px 8px 0;
}
.im-entry__body table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: .95rem; }
.im-entry__body th, .im-entry__body td { border: 1px solid var(--im-line); padding: 10px 14px; text-align: left; }
.im-entry__body th { background: var(--im-bg-soft); color: var(--im-ink); }

.im-sidebar { display: grid; gap: 26px; position: sticky; top: 104px; }
.im-widget { background: var(--im-bg-soft); border: 1px solid var(--im-line); border-radius: var(--im-radius); padding: 24px; }
.im-widget h3 { font-size: 1.05rem; margin-bottom: 14px; }
.im-widget ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.im-widget li a { font-weight: 600; font-size: .93rem; }
.im-widget--cta { background: var(--im-ink); border-color: var(--im-ink); color: #c6d3e0; }
.im-widget--cta h3 { color: #fff; }
.im-widget--cta .im-btn { margin-top: 14px; }

/* ---------- 服务页 ---------- */
.im-service-intro { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 46px; align-items: start; }
.im-specs { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.im-specs li { display: flex; justify-content: space-between; gap: 16px; padding: 12px 16px; background: #fff; border: 1px solid var(--im-line); border-radius: 8px; font-size: .93rem; }
.im-specs strong { color: var(--im-ink); flex: none; }
.im-specs span { text-align: right; }

/* ---------- 文章列表 ---------- */
.im-posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

/* ---------- CTA 横幅 ---------- */
.im-cta { background: linear-gradient(100deg, var(--im-blue) 0%, #2f63d4 100%); color: #fff; }
.im-cta__inner { display: flex; flex-wrap: wrap; gap: 26px; align-items: center; justify-content: space-between; padding: 58px 0; }
.im-cta h2 { color: #fff; margin-bottom: 8px; }
.im-cta p { color: rgba(255,255,255,.9); margin: 0; max-width: 620px; }

/* ---------- 页脚 ---------- */
.im-footer { background: var(--im-ink); color: #9fb3c8; font-size: .93rem; }
.im-footer__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; padding: 64px 0 46px; }
.im-footer h3 { color: #fff; font-size: 1rem; margin-bottom: 18px; }
.im-footer a { color: #9fb3c8; }
.im-footer a:hover { color: #fff; }
.im-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.im-footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.im-footer__brand img { height: 40px; width: auto; background: #fff; border-radius: 6px; padding: 4px 7px; }
.im-footer__brand strong { color: #fff; font-size: 1.15rem; }
.im-social { display: flex; gap: 10px; margin-top: 18px; }
.im-social a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.16); display: grid; place-items: center; }
.im-social a:hover { background: var(--im-blue); border-color: var(--im-blue); }
.im-social svg { width: 17px; height: 17px; fill: currentColor; }
.im-footer__bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; }
.im-footer__bottom .im-wrap { display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; font-size: .86rem; }

/* ---------- 杂项 ---------- */
.im-skip-link { position: absolute; left: -9999px; top: 0; background: #fff; padding: 12px 18px; z-index: 999; }
.im-skip-link:focus { left: 10px; top: 10px; }
.screen-reader-text { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(1px,1px,1px,1px); white-space: nowrap; }
.im-notice { background: #fff6e5; border: 1px solid #f2d08a; border-radius: 8px; padding: 14px 18px; margin-bottom: 24px; font-size: .92rem; color: #7a5a12; }
.im-post-nav { margin-top: 46px; display: flex; gap: 18px; flex-wrap: wrap; justify-content: space-between; border-top: 1px solid var(--im-line); padding-top: 24px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .im-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .im-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .im-posts { grid-template-columns: repeat(2, 1fr); }
  .im-gallery { grid-template-columns: repeat(3, 1fr); }
  .im-entry { grid-template-columns: 1fr; }
  .im-sidebar { position: static; }
  .im-footer__top { grid-template-columns: repeat(2, 1fr); }
  .im-process, .im-about, .im-contact, .im-service-intro { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 860px) {
  .im-header__inner { min-height: 72px; }
  .im-burger { display: block; }
  .im-header__cta { display: none; }
  .im-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; border-top: 1px solid var(--im-line); box-shadow: var(--im-shadow);
    padding: 10px 20px 20px;
  }
  .im-nav.is-open { display: block; }
  .im-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .im-nav .sub-menu { position: static; display: flex; border: 0; box-shadow: none; padding-left: 14px; min-width: 0; }
  .im-nav a { padding: 12px 8px; }
  .im-why { grid-template-columns: 1fr; }
  .im-gallery { grid-template-columns: repeat(2, 1fr); }
  .im-form__grid { grid-template-columns: 1fr; }
  .im-section { padding: 62px 0; }
}

@media (max-width: 640px) {
  .im-grid--4, .im-grid--3, .im-grid--2, .im-posts, .im-gallery { grid-template-columns: repeat(2, 1fr); }
  .im-gallery figure { border-radius: 8px; }
  .im-footer__top { grid-template-columns: 1fr; padding: 46px 0 34px; }
  .im-stats { grid-template-columns: 1fr; }
  .im-hero__inner { padding: 74px 0 66px; }
  .im-form { padding: 24px 20px; }
  .im-cta__inner { padding: 42px 0; }
}

@media (max-width: 420px) {
  .im-gallery { grid-template-columns: 1fr; }
}

/* ---------- 表单提示与字段错误（阶段二新增） ---------- */
.im-notice--error { background: #fdecea; border-color: #f0b7b3; color: #8a1f18; }
.im-field__error {
  display: block; margin-top: 6px; font-size: .84rem; font-weight: 600; color: var(--im-red);
}

/* ---------- 自定义文件选择框（避免原生控件跟随系统语言显示中文） ---------- */
.im-file {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px; border: 1px dashed var(--im-line); border-radius: 7px; background: #fff;
}
/*
  注意选择器权重：这里必须写成「.im-file .im-file__input」而不是单个类名。
  因为上面表单基础样式里有 `.im-field input { width: 100% }`，
  它的权重 (0,1,1) 高于单个类名 (0,1,0)，会把这里的 width:1px 覆盖掉 ——
  结果这个本该隐藏的控件被撑成整行宽，页面出现横向滚动条。
  多一层 .im-file 让权重变成 (0,2,0)，就能压住它。
*/
.im-file .im-file__input {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.im-file__button {
  display: inline-block; cursor: pointer; user-select: none;
  padding: 9px 18px; border-radius: 6px; font-size: .9rem; font-weight: 600;
  background: var(--im-bg-soft); border: 1px solid var(--im-line); color: var(--im-ink);
  transition: background-color .15s ease, border-color .15s ease;
}
.im-file__button:hover { background: #eaf1ff; border-color: var(--im-blue); color: var(--im-blue); }
.im-file__input:focus-visible + .im-file__button {
  outline: 2px solid var(--im-blue); outline-offset: 2px;
}
.im-file__name {
  font-size: .88rem; color: var(--im-slate); min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.im-file__name.is-set { color: var(--im-ink); font-weight: 600; }

/* ---------- 关于我们：工厂实拍（下半部分） ---------- */
.im-factory__lead {
  margin: 0 0 18px; border-radius: 12px; overflow: hidden; background: #fff;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .10);
}
.im-factory__lead img { width: 100%; height: auto; display: block; }
.im-factory__lead figcaption {
  display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: baseline;
  padding: 16px 20px; border-top: 1px solid var(--im-line);
}
.im-factory__lead figcaption strong { font-size: 1.02rem; color: var(--im-ink); }
.im-factory__lead figcaption span { font-size: .9rem; color: var(--im-slate); }

.im-factory__grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px;
}
.im-factory__grid figure {
  margin: 0; border-radius: 12px; overflow: hidden; background: #fff;
  box-shadow: 0 6px 20px rgba(15, 23, 42, .08);
}
.im-factory__grid img { width: 100%; height: auto; display: block; }
.im-factory__grid figcaption {
  padding: 12px 16px; font-size: .9rem; color: var(--im-slate);
  border-top: 1px solid var(--im-line);
}

.im-factory__stats {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px; margin-top: 26px;
}
.im-factory__stats > div {
  background: #fff; border: 1px solid var(--im-line); border-radius: 10px;
  padding: 18px 14px; text-align: center;
}
.im-factory__stats strong {
  display: block; font-size: 1.35rem; color: var(--im-blue); letter-spacing: -.01em;
}
.im-factory__stats span {
  display: block; margin-top: 4px; font-size: .84rem; color: var(--im-slate);
}

@media (max-width: 720px) {
  .im-factory__grid { grid-template-columns: 1fr; }
  .im-factory__stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}