/* ==========================================================================
   西安亚成智能科技有限公司 · 官网样式
   纯静态站点，无构建步骤、无外部依赖。修改后用浏览器强刷即可看到效果。
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --brand: #e1251b;
  --brand-dark: #b81c14;
  --brand-soft: #fdeceb;
  --navy: #0d2b4e;
  --navy-2: #123c68;
  --accent: #1a6fd4;

  --ink: #16202e;
  --ink-2: #33465c;
  --muted: #5b6c82;
  --brand-ink: #c2201a;   /* 浅底上的小红字专用：--brand 在 #f6f8fb 上只有 4.40，压深后 5.65 */
  --line: #e4eaf2;
  --bg: #ffffff;
  --bg-alt: #f6f8fb;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(16, 32, 54, .06), 0 2px 8px rgba(16, 32, 54, .05);
  --shadow-md: 0 10px 30px rgba(13, 43, 78, .10);
  --shadow-lg: 0 20px 50px rgba(13, 43, 78, .16);

  --wrap: 1200px;
  --header-h: 76px;
}

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

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--brand); }
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: .01em; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
strong { color: var(--navy); font-weight: 700; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--navy); color: #fff; padding: 10px 18px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* 上线前待替换占位（域名 / 备案号）—— 替换后此样式不再出现 */
.todo-token {
  display: inline-block;
  background: #fff5d6;
  border: 1px dashed #e0a800;
  color: #8a5a00;
  border-radius: 5px;
  padding: 0 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .92em;
}

/* ==========================================================================
   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);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 20px rgba(13, 43, 78, .06); }

.header-inner {
  display: flex; align-items: center; gap: 28px;
  height: var(--header-h);
}
.brand { flex: 0 0 auto; display: flex; align-items: center; }
.brand img { height: 42px; width: auto; }

.site-nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.site-nav ul { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  display: block; padding: 8px 12px; border-radius: 8px;
  color: var(--ink-2); font-size: 15px; font-weight: 500;
  transition: background .18s ease, color .18s ease;
}
.site-nav a:hover { background: var(--bg-alt); color: var(--brand); }
.site-nav a.is-active { color: var(--brand-ink); background: var(--brand-soft); }

.nav-tel {
  display: flex; flex-direction: column; align-items: flex-end; line-height: 1.25;
  padding: 6px 14px; border-left: 1px solid var(--line);
}
.nav-tel:hover { background: transparent; }
.nav-tel-label { font-size: 11px; color: var(--muted); letter-spacing: .08em; }
.nav-tel-num { font-size: 16px; font-weight: 700; color: var(--navy); white-space: nowrap; }
.nav-tel:hover .nav-tel-num { color: var(--brand); }

.nav-toggle {
  display: none; margin-left: auto;
  width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px;
  background: #fff; cursor: pointer; padding: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--navy); border-radius: 2px; transition: transform .22s ease, opacity .22s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   首屏
   ========================================================================== */
.hero { position: relative; isolation: isolate; color: #fff; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: -2;
  background-image: url("../img/about.jpg");
  background-size: cover; background-position: center 35%;
  transform: scale(1.02);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(100deg, rgba(6, 22, 42, .96) 0%, rgba(8, 30, 56, .93) 45%, rgba(11, 38, 70, .84) 75%, rgba(13, 43, 78, .76) 100%),
    radial-gradient(1200px 420px at 12% 8%, rgba(225, 37, 27, .28), transparent 60%);
}
.hero-inner { padding: 84px 24px 72px; max-width: var(--wrap); }
.eyebrow {
  display: inline-block; margin-bottom: 20px;
  padding: 6px 14px; border-radius: 999px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .22);
  color: #eaf2ff; font-size: 13px; letter-spacing: .04em;
}
.hero h1 { font-size: clamp(28px, 4.4vw, 50px); letter-spacing: .02em; text-shadow: 0 2px 20px rgba(0, 0, 0, .3); }
.hero-sub {
  margin-top: 18px; font-size: clamp(17px, 2.2vw, 24px); font-weight: 600;
  color: #cfe2ff; line-height: 1.55;
}
.hero-text {
  margin-top: 20px; max-width: 720px;
  font-size: 15.5px; line-height: 1.9; color: rgba(233, 241, 252, .86);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 30px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .02em;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 22px rgba(225, 37, 27, .34); }
.btn-primary:hover { background: var(--brand-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(225, 37, 27, .42); }
.btn-ghost { background: rgba(8, 24, 44, .58); color: #fff; border: 1px solid rgba(255, 255, 255, .55); }
.btn-ghost:hover { background: rgba(8, 24, 44, .8); color: #fff; transform: translateY(-2px); }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px;
  margin-top: 56px; padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .18);
}
.hero-stats li { min-width: 0; }
.hero-stats strong {
  display: block; color: #fff; font-size: clamp(24px, 3vw, 34px); font-weight: 800; letter-spacing: .01em;
}
.hero-stats em { font-style: normal; font-size: .5em; font-weight: 600; margin-left: 4px; color: #bcd4f5; }
.hero-stats span { display: block; margin-top: 4px; font-size: 13px; color: rgba(214, 228, 246, .78); }

/* ==========================================================================
   赛事条
   ========================================================================== */
.eventbar { background: var(--navy); color: #dbe8f8; }
.eventbar-inner { display: flex; align-items: center; gap: 24px; padding: 16px 24px; }
.eventbar img { width: min(620px, 52%); height: auto; border-radius: 8px; }
.eventbar-note { font-size: 14px; color: rgba(203, 221, 243, .85); }

/* ==========================================================================
   通用区块
   ========================================================================== */
.section { padding: 88px 0; scroll-margin-top: var(--header-h); }
.section-alt { background: var(--bg-alt); }

.section-head { max-width: 780px; margin-bottom: 46px; }
.kicker {
  margin-bottom: 10px; color: var(--brand-ink);
  font-size: 12.5px; font-weight: 700; letter-spacing: .18em;
}
.section-head h2 { font-size: clamp(24px, 3vw, 34px); color: var(--navy); }
.section-head h2::after {
  content: ""; display: block; width: 48px; height: 3px; margin-top: 14px;
  background: var(--brand); border-radius: 2px;
}
.lead { margin-top: 16px; color: var(--muted); font-size: 16px; line-height: 1.85; }

/* ==========================================================================
   关于我们
   ========================================================================== */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 48px; align-items: start; }
.about-copy p + p { margin-top: 16px; }
.about-copy p { color: var(--ink-2); font-size: 15.5px; line-height: 1.95; }

.creed { display: grid; gap: 12px; margin-top: 30px; }
.creed li {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 20px; border-radius: var(--radius-sm);
  background: var(--bg-alt); border-left: 3px solid var(--brand);
}
.creed span { flex: 0 0 84px; color: var(--muted); font-size: 13.5px; letter-spacing: .06em; }
.creed strong { font-size: 16px; color: var(--navy); }

.about-figure { margin: 0; position: sticky; top: calc(var(--header-h) + 24px); }
.about-figure img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow-md); }
.about-figure figcaption { margin-top: 12px; font-size: 13px; color: var(--muted); text-align: center; }

.scene-strip {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 52px;
}
.scene-strip img {
  width: 100%; aspect-ratio: 3 / 2; object-fit: cover; object-position: center 60%;
  border-radius: var(--radius-sm); background: #eef2f7;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.scene-strip img:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

/* ==========================================================================
   产品与服务
   ========================================================================== */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(246px, 1fr)); gap: 22px; }

.product-card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #d3ddec; }
.product-thumb { aspect-ratio: 3 / 2; background: #f2f5f9; overflow: hidden; }
/* object-position 偏下：产品原图顶部带自带标题条，裁掉可避免与卡片标题重复 */
.product-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: center 62%; transition: transform .35s ease; }
.product-card:hover .product-thumb img { transform: scale(1.05); }
.product-card h3 { padding: 18px 20px 0; font-size: 17px; color: var(--navy); }
.product-card p { padding: 8px 20px 22px; font-size: 14px; line-height: 1.8; color: var(--muted); }

.core-list {
  margin-top: 44px; padding: 30px 34px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.core-list h3 { font-size: 17px; color: var(--navy); margin-bottom: 18px; }
.core-list ul { display: flex; flex-wrap: wrap; gap: 10px; }
.core-list li {
  padding: 7px 16px; border-radius: 999px;
  background: var(--bg-alt); border: 1px solid var(--line);
  font-size: 14px; color: var(--ink-2);
}

/* ==========================================================================
   资质与荣誉
   ========================================================================== */
.honor-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; }
.honor-card {
  position: relative; padding: 28px 28px 26px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .22s ease, box-shadow .22s ease;
}
.honor-card::before {
  content: ""; position: absolute; left: 28px; top: 0; width: 40px; height: 3px;
  background: var(--brand); border-radius: 0 0 3px 3px;
}
.honor-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.honor-card h3 { margin-top: 8px; font-size: 17px; color: var(--navy); }
.honor-card p { margin-top: 12px; font-size: 14.5px; line-height: 1.85; color: var(--muted); }

/* ==========================================================================
   发展历程
   ========================================================================== */
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--brand), #cdd9e8); border-radius: 2px; }
.timeline li { position: relative; padding: 0 0 26px 26px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -26px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: #fff; border: 3px solid var(--brand);
}
.timeline time {
  display: block; margin-bottom: 4px;
  font-size: 13.5px; font-weight: 700; color: var(--brand-ink); letter-spacing: .04em;
}
.timeline p { font-size: 15px; line-height: 1.85; color: var(--ink-2); }

/* ==========================================================================
   新闻动态
   ========================================================================== */
.news-list { border-top: 1px solid var(--line); }
.news-list li {
  display: flex; align-items: baseline; gap: 26px;
  padding: 20px 6px; border-bottom: 1px solid var(--line);
  transition: background .18s ease, padding-left .18s ease;
}
.news-list li:hover { background: var(--bg-alt); padding-left: 16px; }
.news-list time { flex: 0 0 104px; font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }
.news-list p { font-size: 15.5px; color: var(--ink-2); line-height: 1.7; }

/* ==========================================================================
   合作单位
   ========================================================================== */
.partner-wall {
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 18px;
}
.partner-wall img {
  width: 100%; height: 76px; object-fit: contain;
  padding: 12px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  filter: grayscale(1); opacity: .78;
  transition: filter .25s ease, opacity .25s ease, transform .25s ease;
}
.partner-wall img:hover { filter: none; opacity: 1; transform: translateY(-3px); }

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 26px; align-items: start; }

.contact-card {
  padding: 34px 36px; border-radius: var(--radius);
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #dce8f8; box-shadow: var(--shadow-md);
}
.contact-card h3 { font-size: 19px; color: #fff; padding-bottom: 18px; border-bottom: 1px solid rgba(255, 255, 255, .16); }
.contact-card dl { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 12px 18px; margin-top: 22px; }
.contact-card dt { color: #93aecd; font-size: 14px; }
.contact-card dd { font-size: 15px; line-height: 1.7; }
.contact-card a { color: #fff; }
.contact-card a:hover { color: #ffb3ad; }

.contact-side { display: grid; gap: 22px; }
.contact-note {
  padding: 28px 30px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.contact-note h3 { font-size: 17px; color: var(--navy); }
.contact-note ul { margin-top: 16px; display: grid; gap: 10px; }
.contact-note li { position: relative; padding-left: 20px; font-size: 14.5px; color: var(--ink-2); }
.contact-note li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 7px; height: 7px; border-radius: 50%; background: var(--brand);
}

.map-link {
  display: block; padding: 24px 30px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.map-link:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #d3ddec; }
.map-link-title { display: block; font-size: 16px; font-weight: 700; color: var(--navy); }
.map-link-sub { display: block; margin-top: 4px; font-size: 13.5px; color: var(--muted); }

/* ==========================================================================
   常见问题（GEO：FAQ 区块 —— 答案始终可见，不做折叠，便于 AI 抓取）
   ========================================================================== */
.faq-list { display: grid; gap: 16px; max-width: 920px; }
.faq-item {
  padding: 24px 28px; background: #fff;
  border: 1px solid var(--line); border-left: 3px solid var(--brand);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.faq-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.faq-item h3 { font-size: 16.5px; color: var(--navy); line-height: 1.5; }
.faq-item p { margin-top: 10px; font-size: 14.5px; line-height: 1.9; color: var(--ink-2); }

/* ==========================================================================
   内页（隐私政策等）：面包屑 + 文档正文
   ========================================================================== */
.doc-wrap { max-width: 900px; }
.breadcrumb { margin-bottom: 26px; font-size: 13.5px; color: var(--muted); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; }
.breadcrumb li + li::before { content: "›"; margin: 0 8px; color: #b6c3d4; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--brand-ink); }
.breadcrumb [aria-current] { color: var(--navy); font-weight: 600; }

.doc-body { max-width: 800px; }
.doc-body h2 {
  margin-top: 34px; font-size: 18px; color: var(--navy);
  padding-left: 12px; border-left: 3px solid var(--brand); line-height: 1.5;
}
.doc-body p { margin-top: 12px; font-size: 15px; line-height: 1.95; color: var(--ink-2); }
.doc-list { margin-top: 12px; display: grid; gap: 8px; }
.doc-list li { position: relative; padding-left: 18px; font-size: 15px; line-height: 1.85; color: var(--ink-2); }
.doc-list li::before {
  content: ""; position: absolute; left: 0; top: .68em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--brand);
}
.doc-meta { margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
.doc-back { margin-top: 26px; font-size: 14.5px; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: #0a1f38; color: #9fb4cd; }
.footer-inner {
  display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .6fr) minmax(0, .9fr);
  gap: 40px; padding: 56px 24px 44px;
}
.footer-brand img { height: 40px; width: auto; background: #fff; padding: 6px 10px; border-radius: 8px; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.85; max-width: 420px; }
.footer-nav h3, .footer-contact h3 { font-size: 15px; color: #fff; margin-bottom: 16px; }
.footer-nav ul { display: grid; gap: 9px; }
.footer-nav a, .footer-contact a { color: #9fb4cd; font-size: 14px; }
.footer-nav a:hover, .footer-contact a:hover { color: #fff; }
.footer-contact p { font-size: 14px; line-height: 1.85; }
.footer-contact p + p { margin-top: 10px; }

.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); }
.footer-bottom .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px; padding: 20px 24px 26px;
}
.copyright, .beian { font-size: 13px; color: #7d93ad; }
.beian a { color: #9fb4cd; }
.beian a:hover { color: #fff; }
.beian-police { margin-left: 12px; }

/* ==========================================================================
   返回顶部
   ========================================================================== */
.to-top {
  position: fixed; right: 22px; bottom: 26px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; color: var(--navy);
  box-shadow: var(--shadow-md); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.to-top:hover { background: var(--brand); color: #fff; transform: translateY(-3px); }
/* 必须显式覆盖：.to-top 的 display:flex 会盖掉 [hidden] 的 UA 样式 display:none */
.to-top[hidden] { display: none; }

/* ==========================================================================
   滚动入场动画
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .site-nav { gap: 14px; }
  .site-nav a { padding: 8px 8px; font-size: 14px; }
  .nav-tel { padding-left: 12px; }
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
}

@media (max-width: 960px) {
  :root { --header-h: 64px; }
  .brand img { height: 36px; }

  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: var(--header-h);
    margin-left: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(13, 43, 78, .12);
    padding: 8px 16px 20px;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .site-nav a { padding: 12px 10px; font-size: 15px; }
  .nav-tel { border-left: 0; border-top: 1px solid var(--line); margin-top: 10px; padding: 14px 10px 0; align-items: flex-start; }

  .hero-inner { padding: 64px 24px 56px; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 18px; margin-top: 40px; }

  .eventbar-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .eventbar img { width: 100%; }

  .section { padding: 64px 0; }
  .about-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .about-figure { position: static; }
  .scene-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 36px; }

  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .partner-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  .footer-inner { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 44px 24px 32px; }
}

@media (max-width: 620px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 18px; }
  .hero-inner { padding: 52px 18px 48px; }
  .hero-actions { gap: 10px; }
  .btn { flex: 1 1 auto; padding: 12px 22px; }
  .section { padding: 52px 0; }
  .section-head { margin-bottom: 32px; }

  .creed li { flex-direction: column; align-items: flex-start; gap: 4px; }
  .creed span { flex: none; }

  /* 窄屏改为「左图右文」横排卡片：两列网格在 390px 下每列不足 170px，正文会挤成 11 字/行。
     用 grid 而非 flex —— flex row 会把 h3 与 p 变成并列项，标题被压成竖排。 */
  .product-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .product-card { display: grid; grid-template-columns: 128px minmax(0, 1fr); }
  .product-thumb { grid-area: 1 / 1 / 3 / 2; min-height: 128px; aspect-ratio: auto; }
  .product-card h3 { grid-area: 1 / 2 / 2 / 3; padding: 14px 16px 0; font-size: 15.5px; }
  .product-card p { grid-area: 2 / 2 / 3 / 3; padding: 6px 16px 14px; font-size: 13.5px; }

  .core-list { padding: 24px 20px; }
  .honor-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .honor-card { padding: 24px 24px 22px; }

  .news-list li { flex-direction: column; gap: 6px; padding: 16px 4px; }
  .news-list time { flex: none; }

  .partner-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .partner-wall img { height: 64px; }

  .contact-card { padding: 26px 22px; }
  .contact-card dl { grid-template-columns: 62px minmax(0, 1fr); gap: 10px 14px; }
  .footer-bottom .wrap { flex-direction: column; align-items: flex-start; }

  .to-top { right: 14px; bottom: 18px; }
}

/* ---------- 无障碍：尊重系统减弱动效设置 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   无 JS 兜底
   移动端的 .site-nav 默认 display:none，靠 JS 加 .is-open 才显示 ——
   禁用 JS 时 7 个锚点会全部不可达。这里让 no-js 状态下导航直接铺开。
   （index.html 头部有一行内联脚本把 no-js 换成 js，正常浏览器不会走到这里）
   ========================================================================== */
.no-js .nav-toggle { display: none; }

@media (max-width: 960px) {
  .no-js .site-header { position: static; }
  .no-js .header-inner { flex-wrap: wrap; height: auto; padding-top: 12px; padding-bottom: 14px; }
  .no-js .site-nav {
    position: static; display: flex; flex-basis: 100%; order: 3;
    padding: 10px 0 0; border-bottom: 0; box-shadow: none;
  }
  .no-js .site-nav ul { flex-wrap: wrap; flex-direction: row; }
  .no-js .nav-tel { flex-basis: 100%; }
}