/* ============================================================
   LOGIONRAM 官网样式  ·  www.logionram.com
   设计系统：科技蓝 + 深海军蓝 / 大量留白 / 大字号标题
   ============================================================ */

:root {
  --c-primary: #1663ff;
  --c-primary-dark: #0b47c2;
  --c-navy: #0b1a33;
  --c-navy-2: #10254a;
  --c-text: #1c2534;
  --c-text-2: #5a6779;
  --c-line: #e5eaf2;
  --c-bg: #ffffff;
  --c-bg-soft: #f4f7fc;
  --c-cyan: #38c6ff;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(11, 26, 51, .10);
  --shadow-sm: 0 4px 16px rgba(11, 26, 51, .07);
  --container: 1200px;
  --header-h: 72px;
  --header-nav-h: 54px;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.75;
  font-size: 16px;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

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

/* ---------- 通用标题 ---------- */
.section { padding: 88px 0; }
.section--soft { background: var(--c-bg-soft); }

.sec-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.sec-head .sec-kicker {
  display: inline-block;
  color: var(--c-primary);
  font-weight: 700;
  letter-spacing: .35em;
  font-size: 13px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.sec-head h2 {
  font-size: clamp(26px, 4vw, 38px);
  color: var(--c-navy);
  letter-spacing: .02em;
  line-height: 1.3;
}
.sec-head p { color: var(--c-text-2); margin-top: 14px; font-size: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 34px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: all .25s ease;
  border: 1px solid transparent;
}
.btn--primary { background: var(--c-primary); color: #fff; box-shadow: 0 8px 24px rgba(22, 99, 255, .35); }
.btn--primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); }
.btn--ghost { border-color: rgba(255, 255, 255, .65); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); }
.btn--line { border-color: var(--c-primary); color: var(--c-primary); }
.btn--line:hover { background: var(--c-primary); color: #fff; }

/* ============================================================
   顶部导航
   ============================================================ */
.topbar {
  background: var(--c-navy);
  color: rgba(255, 255, 255, .72);
  font-size: 13px;
}
.topbar .container {
  display: flex; justify-content: space-between; align-items: center;
  min-height: 36px; gap: 16px;
}
.topbar a:hover { color: #fff; }
.topbar .topbar-links { display: flex; gap: 20px; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .3s ease;
}
.site-header.is-scrolled { box-shadow: var(--shadow-sm); }

/* 页头两行布局：第一行 LOGO / CTA，第二行导航栏横排贯穿整行 */
.header-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "logo  info  cta"
    "nav   nav   nav";
  align-items: center;
  column-gap: 24px;
  row-gap: 0;
}
.site-header .logo { grid-area: logo; height: var(--header-h); display: flex; align-items: center; }

/* Logo（图片文件形式：覆盖 assets/img/logo.png 即可换标，无需改代码） */
.logo { display: flex; align-items: center; gap: 12px; }
.logo-img { height: 42px; width: auto; display: block; flex: none; }
/* 页脚深色背景：LOGO 为深蓝色调，加白色圆角衬底保证可读 */
.site-footer .logo {
  background: #fff;
  padding: 8px 14px;
  border-radius: 10px;
  align-self: flex-start;
}
.site-footer .logo-img { height: 38px; }
.logo-text { line-height: 1.15; }
.logo-text strong {
  display: block; font-size: 21px; letter-spacing: .06em;
  color: var(--c-navy); font-weight: 800;
}
.logo-text span { font-size: 11px; color: var(--c-text-2); letter-spacing: .22em; }

/* 导航栏：独占一行，横向排列，居中铺开 */
.main-nav {
  grid-area: nav;
  border-top: 1px solid var(--c-line);
}
.main-nav ul {
  display: flex; justify-content: center; align-items: center;
  gap: 4px; height: var(--header-nav-h);
}
.main-nav a {
  display: flex; align-items: center; height: 40px;
  padding: 0 20px;
  font-size: 16px; font-weight: 600; color: var(--c-text);
  border-radius: 8px; position: relative; white-space: nowrap;
  transition: color .2s ease, background-color .2s ease;
}
.main-nav a::after {
  content: ""; position: absolute; left: 20px; right: 20px; bottom: 2px;
  height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-cyan));
  transform: scaleX(0); transform-origin: center;
  transition: transform .25s ease;
}
.main-nav a:hover { color: var(--c-primary); background: var(--c-bg-soft); }
.main-nav a:hover::after,
.main-nav a[aria-current="page"]::after { transform: scaleX(1); }
.main-nav a[aria-current="page"] { color: var(--c-primary); }

.header-cta { grid-area: cta; justify-self: end; flex: none; }

/* 移动端菜单 */
.nav-toggle {
  display: none; width: 44px; height: 44px;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--c-navy);
  transition: all .25s ease; border-radius: 2px;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Banner 轮播
   ============================================================ */
.hero { position: relative; }
.hero-slider { position: relative; overflow: hidden; }

.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; visibility: hidden;
  transition: opacity .9s ease, visibility .9s ease;
}
.hero-slide.is-active { position: relative; opacity: 1; visibility: visible; }

.hero-slide .slide-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transform: scale(1.06);
  transition: transform 7s linear;
}
.hero-slide.is-active .slide-bg { transform: scale(1); }
.hero-slide::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(7, 16, 34, .78) 0%, rgba(7, 16, 34, .45) 52%, rgba(7, 16, 34, .12) 100%);
}
.hero-slide--right::after {
  background: linear-gradient(270deg, rgba(7, 16, 34, .78) 0%, rgba(7, 16, 34, .45) 52%, rgba(7, 16, 34, .12) 100%);
}

.slide-content {
  position: relative; z-index: 2;
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  min-height: clamp(460px, 62vh, 640px);
  display: flex; flex-direction: column; justify-content: center;
  color: #fff;
}
.hero-slide--right .slide-content { align-items: flex-end; text-align: right; }
.slide-content .inner { max-width: 560px; }

.slide-tag {
  display: inline-block;
  font-size: 13px; letter-spacing: .3em; font-weight: 600;
  color: var(--c-cyan);
  border: 1px solid rgba(56, 198, 255, .5);
  padding: 5px 16px; border-radius: 999px;
  margin-bottom: 22px;
}
.slide-content h1, .slide-content h2 {
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.22; letter-spacing: .03em;
  text-shadow: 0 4px 30px rgba(0, 0, 0, .45);
}
.slide-content h1 em, .slide-content h2 em { font-style: normal; color: var(--c-cyan); }
.slide-content p {
  margin-top: 18px; font-size: clamp(15px, 1.6vw, 18px);
  color: rgba(255, 255, 255, .85); max-width: 480px;
}
.hero-slide--right .slide-content p { margin-left: auto; }
.slide-btns { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-slide--right .slide-btns { justify-content: flex-end; }

/* 轮播圆点与箭头 */
.slider-dots {
  position: absolute; z-index: 5; left: 50%; bottom: 26px;
  transform: translateX(-50%);
  display: flex; gap: 10px;
}
.slider-dots button {
  width: 34px; height: 5px; border-radius: 5px;
  background: rgba(255, 255, 255, .35);
  transition: all .3s ease;
}
.slider-dots button.is-active { background: #fff; width: 52px; }

.slider-arrow {
  position: absolute; z-index: 5; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3);
  color: #fff; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  transition: background .25s ease;
  backdrop-filter: blur(4px);
}
.slider-arrow:hover { background: rgba(255, 255, 255, .3); }
.slider-arrow--prev { left: 26px; }
.slider-arrow--next { right: 26px; }

/* 信任条 */
.trust-strip { background: var(--c-navy); color: #fff; }
.trust-strip .container {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; padding-top: 26px; padding-bottom: 26px;
}
.trust-item { display: flex; gap: 14px; align-items: center; }
.trust-item b { font-size: 26px; font-weight: 800; color: var(--c-cyan); display: block; line-height: 1.2; }
.trust-item span { font-size: 13.5px; color: rgba(255, 255, 255, .75); }

/* ============================================================
   产品分类卡片（首页）
   ============================================================ */
.cat-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px;
}
.cat-card {
  background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 38px 28px 34px;
  transition: all .3s ease;
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
}
.cat-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-cyan));
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.cat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: transparent; }
.cat-card:hover::before { transform: scaleX(1); }

.cat-icon {
  width: 64px; height: 64px; border-radius: 16px;
  background: linear-gradient(135deg, #eef4ff, #e3edff);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.cat-icon svg { width: 36px; height: 36px; }
.cat-card h3 { font-size: 20px; color: var(--c-navy); margin-bottom: 4px; }
.cat-card .en { font-size: 12px; color: var(--c-text-2); letter-spacing: .18em; text-transform: uppercase; }
.cat-card p { color: var(--c-text-2); font-size: 14.5px; margin: 14px 0 20px; flex: 1; }
.cat-card .more {
  color: var(--c-primary); font-weight: 600; font-size: 14.5px;
  display: inline-flex; align-items: center; gap: 6px;
}
.cat-card .more:hover { gap: 10px; transition: gap .2s ease; }

/* ============================================================
   优势 / 特性区
   ============================================================ */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feat-item {
  background: #fff; border-radius: var(--radius);
  padding: 36px 30px; box-shadow: var(--shadow-sm);
  border-top: 3px solid transparent;
  transition: all .3s ease;
}
.feat-item:hover { border-top-color: var(--c-primary); transform: translateY(-6px); box-shadow: var(--shadow); }
.feat-item .num {
  font-size: 40px; font-weight: 800; color: transparent;
  -webkit-text-stroke: 1.5px var(--c-primary);
  line-height: 1; margin-bottom: 18px;
}
.feat-item h3 { font-size: 18px; color: var(--c-navy); margin-bottom: 10px; }
.feat-item p { font-size: 14.5px; color: var(--c-text-2); }

/* 应用场景 */
.scene-banner {
  position: relative; border-radius: var(--radius); overflow: hidden;
  min-height: 340px; display: flex; align-items: center;
  background: var(--c-navy) url("../img/banner-alt-family.jpg") center/cover no-repeat;
}
.scene-banner::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(7, 16, 34, .88), rgba(7, 16, 34, .35));
}
.scene-banner .inner {
  position: relative; z-index: 2; color: #fff; padding: 48px;
  max-width: 640px;
}
.scene-banner h3 { font-size: clamp(22px, 3vw, 30px); margin-bottom: 12px; }
.scene-banner p { color: rgba(255, 255, 255, .82); margin-bottom: 24px; }
.scene-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.scene-tags span {
  border: 1px solid rgba(255, 255, 255, .35);
  padding: 6px 18px; border-radius: 999px; font-size: 13.5px;
}

/* ============================================================
   新闻列表
   ============================================================ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card {
  background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius); overflow: hidden;
  transition: all .3s ease; display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow); transform: translateY(-6px); border-color: transparent; }
.news-card .thumb {
  height: 190px; background: linear-gradient(135deg, var(--c-navy-2), var(--c-primary));
  display: flex; align-items: center; justify-content: center;
  color: rgba(255, 255, 255, .9); font-size: 40px; font-weight: 800; letter-spacing: .1em;
}
.news-card .body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.news-card time { color: var(--c-text-2); font-size: 13px; }
.news-card h3 { font-size: 17px; color: var(--c-navy); margin: 8px 0 10px; line-height: 1.5; }
.news-card p { font-size: 14px; color: var(--c-text-2); flex: 1; }
.news-card .more { color: var(--c-primary); font-weight: 600; font-size: 14px; margin-top: 16px; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { background: var(--c-navy); color: rgba(255, 255, 255, .72); margin-top: 0; }
.footer-top {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
  padding: 64px 0 48px;
}
.footer-top h4 {
  color: #fff; font-size: 16px; margin-bottom: 18px; letter-spacing: .05em;
}
.footer-top a { display: block; padding: 4px 0; font-size: 14.5px; transition: color .2s; }
.footer-top a:hover { color: #fff; }
.footer-brand p { font-size: 14px; margin: 14px 0 20px; max-width: 300px; }
.footer-contact li {
  display: flex; gap: 10px; font-size: 14.5px; padding: 5px 0; line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 20px 0; font-size: 13px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.footer-bottom a:hover { color: #fff; }

/* 返回顶部 */
.back-top {
  position: fixed; right: 26px; bottom: 30px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--c-primary); color: #fff; font-size: 18px;
  box-shadow: 0 8px 24px rgba(22, 99, 255, .4);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all .3s ease;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ============================================================
   内页通用（页面 hero / 面包屑 / 正文）
   ============================================================ */
.page-hero {
  position: relative; color: #fff; overflow: hidden;
  background: var(--c-navy);
}
.page-hero .bg {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: .55;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(7, 16, 34, .82), rgba(7, 16, 34, .3));
}
.page-hero .inner {
  position: relative; z-index: 2;
  max-width: var(--container); margin: 0 auto; padding: 96px 24px 84px;
}
.page-hero h1 { font-size: clamp(28px, 4.4vw, 44px); letter-spacing: .04em; }
.page-hero .sub { margin-top: 12px; color: rgba(255, 255, 255, .82); max-width: 620px; font-size: 16.5px; }

.breadcrumb {
  padding: 18px 0; font-size: 13.5px; color: var(--c-text-2);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; color: #b9c2d0; }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb [aria-current] { color: var(--c-navy); font-weight: 600; }

/* 产品卡片（产品页） */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.prod-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; transition: all .3s ease; display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.prod-card .thumb {
  height: 200px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #f2f6fd, #e8effb);
}
.prod-card .thumb svg { width: 150px; height: 110px; }
.prod-card .body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.prod-card h3 { font-size: 18px; color: var(--c-navy); }
.prod-card .en { font-size: 12px; color: var(--c-text-2); letter-spacing: .12em; }
.prod-card .spec { margin: 14px 0 18px; flex: 1; }
.prod-card .spec li {
  font-size: 13.5px; color: var(--c-text-2); padding: 3px 0;
  display: flex; gap: 8px;
}
.prod-card .spec li::before { content: "▪"; color: var(--c-primary); }
.prod-card .btn { align-self: flex-start; padding: 9px 26px; font-size: 14px; }

/* 表格 */
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.spec-table th, .spec-table td {
  border: 1px solid var(--c-line); padding: 12px 16px; text-align: left;
}
.spec-table th { background: var(--c-bg-soft); color: var(--c-navy); white-space: nowrap; }
.spec-table tr:hover td { background: #f8faff; }
.table-wrap { overflow-x: auto; }

/* 荣誉资质 */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.honor-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 30px 24px; text-align: center; transition: all .3s ease;
}
.honor-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.honor-card .medal { font-size: 40px; margin-bottom: 14px; }
.honor-card h3 { font-size: 16px; color: var(--c-navy); line-height: 1.5; }
.honor-card p { font-size: 13px; color: var(--c-text-2); margin-top: 6px; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h2 { font-size: 26px; color: var(--c-navy); margin-bottom: 24px; }
.contact-info dl { display: grid; grid-template-columns: auto 1fr; gap: 12px 20px; font-size: 15px; }
.contact-info dt { color: var(--c-text-2); white-space: nowrap; }
.contact-info dd { color: var(--c-text); font-weight: 500; }
.contact-form {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 34px; box-shadow: var(--shadow-sm);
}
.contact-form h2 { font-size: 22px; color: var(--c-navy); margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: block; font-size: 14px; font-weight: 600; margin: 14px 0 6px; color: var(--c-navy); }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--c-line); border-radius: 8px;
  font: inherit; font-size: 14.5px; color: var(--c-text);
  background: var(--c-bg-soft);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
  outline: none; border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(22, 99, 255, .12);
  background: #fff;
}
.contact-form .btn { margin-top: 22px; width: 100%; justify-content: center; }

/* 关于我们时间轴 */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px;
  width: 2px; background: linear-gradient(var(--c-primary), var(--c-cyan));
}
.timeline li { position: relative; padding: 0 0 30px 12px; }
.timeline li::before {
  content: ""; position: absolute; left: -27px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: #fff; border: 3px solid var(--c-primary);
}
.timeline b { color: var(--c-primary); font-size: 17px; }
.timeline p { color: var(--c-text-2); font-size: 14.5px; margin-top: 4px; }

/* FAQ */
.faq-item {
  border: 1px solid var(--c-line); border-radius: 10px;
  margin-bottom: 12px; overflow: hidden; background: #fff;
}
.faq-item summary {
  padding: 16px 20px; font-weight: 600; color: var(--c-navy);
  cursor: pointer; list-style: none; position: relative; padding-right: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 20px; top: 50%;
  transform: translateY(-50%); font-size: 20px; color: var(--c-primary);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item .ans { padding: 0 20px 16px; color: var(--c-text-2); font-size: 14.5px; }

/* 文章页 */
.article { max-width: 820px; margin: 0 auto; }
.article .meta { color: var(--c-text-2); font-size: 14px; margin-bottom: 26px; }
.article h2 { font-size: 22px; color: var(--c-navy); margin: 34px 0 14px; }
.article p { margin-bottom: 14px; color: #333f52; }
.article ul { list-style: disc; padding-left: 22px; margin-bottom: 14px; color: #333f52; }

/* 动画：滚动进入 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .cat-grid, .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .feat-grid, .news-grid, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .main-nav a { padding: 0 14px; font-size: 15px; }
  .main-nav ul { justify-content: space-between; gap: 0; }
}

@media (max-width: 860px) {
  /* 移动端：页头恢复单行，导航收起为抽屉 */
  .header-inner {
    display: flex; height: var(--header-h);
    justify-content: space-between; gap: 16px;
  }
  .site-header .logo { height: auto; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .main-nav {
    position: fixed; top: 0; right: 0; bottom: 0;
    width: min(320px, 84vw); border-top: 0;
    background: #fff; box-shadow: -12px 0 40px rgba(11, 26, 51, .18);
    transform: translateX(100%); transition: transform .3s ease;
    padding: 90px 24px 24px; z-index: 99; overflow-y: auto;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 4px; height: auto; justify-content: flex-start; align-items: stretch; }
  .main-nav a { font-size: 17px; padding: 13px 12px; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  .main-nav a::after { display: none; }
  .main-nav a[aria-current="page"] { background: var(--c-bg-soft); }

  .topbar .topbar-links { display: none; }
  .trust-strip .container { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-slide--right .slide-content { align-items: flex-start; text-align: left; }
  .hero-slide--right .slide-content p { margin-left: 0; }
  .hero-slide--right .slide-btns { justify-content: flex-start; }
  .slider-arrow { display: none; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .logo-img { height: 34px; }
  .section { padding: 60px 0; }
  .cat-grid, .feat-grid, .news-grid, .prod-grid, .honor-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .trust-strip .container { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .slide-content .inner { max-width: 100%; }
  .slide-btns .btn { padding: 11px 24px; }
}

/* 打印与无障碍 */
:focus-visible { outline: 3px solid var(--c-primary); outline-offset: 2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}