@charset "utf-8";
/* ============================================================
   大连渤尔科技有限公司 · 企业官网样式表
   设计令牌：主色取自原站品牌色 rgba(0,54,134,1)
   结构：1 令牌 / 2 基础 / 3 布局 / 4 头部 / 5 首页 / 6 内页
        7 组件 / 8 页脚 / 9 响应式 / 10 可访问性
   ============================================================ */

/* ---------- 1 设计令牌 ---------- */
:root {
  --c-primary: #003686;
  --c-primary-600: #0b47a1;
  --c-primary-700: #002a68;
  --c-primary-900: #001a42;
  --c-accent: #1e6fd9;

  --c-ink: #0d1b2a;
  --c-body: #46586d;
  --c-muted: #7b8a9c;
  --c-bg: #ffffff;
  --c-soft: #f4f7fb;
  --c-soft-2: #e9eff7;
  --c-line: #e2e8f0;

  --font-sans: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB",
    "Source Han Sans SC", "Noto Sans CJK SC", "Heiti SC", sans-serif;
  --font-num: "DIN Alternate", "Helvetica Neue", Arial, sans-serif;

  --container: 1200px;
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;

  --sh-1: 0 1px 2px rgba(13, 27, 42, .06), 0 2px 8px rgba(13, 27, 42, .05);
  --sh-2: 0 4px 14px rgba(13, 27, 42, .08), 0 12px 32px rgba(13, 27, 42, .07);
  --sh-3: 0 18px 50px rgba(0, 26, 66, .18);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 88px;
}

/* ---------- 2 基础 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-body);
  background: var(--c-bg);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .01em;
}

h1 { font-size: clamp(26px, 3vw, 40px); }
h2 { font-size: clamp(24px, 2.4vw, 34px); }
h3 { font-size: clamp(17px, 1.4vw, 20px); }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color .2s var(--ease), opacity .2s var(--ease);
}

a:hover { color: var(--c-accent); }

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

ul, ol { margin: 0; padding: 0; list-style: none; }

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 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;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; color: #fff; }

/* ---------- 3 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: clamp(56px, 6vw, 96px) 0; }
.section--soft { background: var(--c-soft); }
.section--tight { padding: clamp(40px, 4vw, 64px) 0; }

.section-head {
  margin-bottom: clamp(32px, 3.4vw, 52px);
}
.section-head--center { text-align: center; }

.section-head .eyebrow {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.section-head h2 { margin-bottom: 14px; }

.section-head .desc {
  max-width: 62ch;
  margin: 0;
  color: var(--c-body);
}
.section-head--center .desc { margin: 0 auto; }

.rule {
  width: 44px;
  height: 3px;
  background: var(--c-primary);
  margin: 0 0 18px;
}
.section-head--center .rule { margin: 0 auto 18px; }

.grid { display: grid; gap: clamp(18px, 2vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 4 头部 ---------- */
.topbar {
  background: var(--c-primary-900);
  color: rgba(255, 255, 255, .82);
  font-size: 13px;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 38px;
}
.topbar__left { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.topbar a { color: rgba(255, 255, 255, .82); }
.topbar a:hover { color: #fff; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }
.topbar__item svg { width: 14px; height: 14px; opacity: .8; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .25s var(--ease);
}
.site-header.is-stuck { box-shadow: var(--sh-2); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h);
}

.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand img { height: 46px; width: auto; }
.brand__text { display: none; }

.nav { display: flex; align-items: center; }
.nav__list { display: flex; align-items: center; gap: 4px; }

.nav__link {
  position: relative;
  display: block;
  padding: 0 16px;
  line-height: var(--header-h);
  font-size: 16px;
  font-weight: 500;
  color: var(--c-ink);
  white-space: nowrap;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 26px;
  height: 2px;
  background: var(--c-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav__link:hover::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link:hover,
.nav__link[aria-current="page"] { color: var(--c-primary); }
.nav__link[aria-current="page"] { font-weight: 700; }

.nav__item { position: relative; }
.nav__sub {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 168px;
  padding: 8px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--sh-2);
  border: 1px solid var(--c-line);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}
.nav__item:hover .nav__sub,
.nav__item:focus-within .nav__sub {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav__sub a {
  display: block;
  padding: 9px 14px;
  font-size: 15px;
  color: var(--c-body);
  border-radius: var(--radius-sm);
}
.nav__sub a:hover { background: var(--c-soft); color: var(--c-primary); }

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--c-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.header__cta:hover { background: var(--c-primary-700); color: #fff; transform: translateY(-1px); }
.header__cta svg { width: 16px; height: 16px; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-ink);
  position: relative;
  transition: background .2s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--c-ink);
  transition: transform .25s var(--ease);
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 5 首页 · 英雄轮播 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--c-primary-900);
}

.hero__track {
  position: relative;
  width: 100%;
  aspect-ratio: 1920 / 820;
  max-height: 720px;
}

.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity .8s var(--ease), visibility .8s;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
}
.hero__slide.is-active { opacity: 1; visibility: visible; }

/* 第 1 屏：原站以文字模块叠加在浅色底图上，这里用 HTML 文字还原 */
.hero__slide--text { background-color: #eef3fa; }
.hero__slide--text::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, .96) 0%, rgba(255, 255, 255, .88) 42%, rgba(255, 255, 255, .1) 72%, rgba(255, 255, 255, 0) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  max-width: 700px;
}

.hero__eyebrow {
  font-family: var(--font-num);
  font-size: clamp(12px, 1.1vw, 16px);
  font-weight: 600;
  letter-spacing: .32em;
  color: var(--c-primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero__title {
  margin: 0 0 18px;
  font-size: clamp(27px, 3.4vw, 52px);
  line-height: 1.2;
  text-wrap: balance;
  color: #1d2b3a;
  font-weight: 700;
}

.hero__subtitle {
  margin: 0 0 30px;
  font-size: clamp(15px, 1.3vw, 20px);
  color: #5a6b80;
  font-weight: 400;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* 轮播控制 */
.hero__dots {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  gap: 10px;
}
.hero__dot {
  width: 34px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, .45);
  transition: background .25s var(--ease), width .25s var(--ease);
}
.hero__dot[aria-selected="true"] { background: #fff; width: 46px; }

/* 浅色底图（第 1 屏）时切换控件为深色，保证可见 */
.hero.is-light .hero__arrow {
  background: #fff;
  border-color: rgba(0, 54, 134, .16);
  color: var(--c-primary);
  box-shadow: 0 2px 10px rgba(13, 27, 42, .12);
}
.hero.is-light .hero__arrow:hover { background: #fff; }
.hero.is-light .hero__dot { background: rgba(0, 54, 134, .2); }
.hero.is-light .hero__dot[aria-selected="true"] { background: var(--c-primary); }

.hero__arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  width: 48px;
  height: 48px;
  margin-top: -24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, .18);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .4);
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.hero__arrow:hover { background: rgba(255, 255, 255, .34); transform: scale(1.06); }
.hero__arrow svg { width: 20px; height: 20px; }
.hero__arrow--prev { left: 24px; }
.hero__arrow--next { right: 24px; }
.hero__arrow--prev svg { transform: rotate(180deg); }

/* ---------- 6 首页 · 各区块 ---------- */
/* 数据条 */
.stats {
  background: var(--c-primary);
  color: #fff;
}
.stats__inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, .16);
}
.stats__item {
  background: var(--c-primary);
  padding: 26px 24px;
  text-align: center;
}
.stats__num {
  font-family: var(--font-num);
  font-size: clamp(26px, 2.6vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
}
.stats__num small { font-size: .62em; font-weight: 600; margin-left: 2px; }
.stats__label { margin-top: 8px; font-size: 14px; color: rgba(255, 255, 255, .78); }

/* 产品系列卡 */
.series-card {
  position: relative;
  display: block;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.series-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-2);
  border-color: transparent;
}
.series-card__media {
  aspect-ratio: 16 / 11;
  background: var(--c-soft);
  display: grid;
  place-items: center;
  padding: 18px;
}
.series-card__media img {
  max-height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  transition: transform .4s var(--ease);
}
.series-card:hover .series-card__media img { transform: scale(1.04); }
.series-card__body {
  padding: 18px 20px 22px;
  border-top: 1px solid var(--c-line);
}
.series-card__tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-accent);
  font-family: var(--font-num);
  margin-bottom: 6px;
}
.series-card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.45;
}
.series-card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 14px;
  color: var(--c-primary);
}
.series-card__more svg { width: 14px; height: 14px; transition: transform .2s var(--ease); }
.series-card:hover .series-card__more svg { transform: translateX(3px); }

/* 关于我们（图文） */
.about-block {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}
.about-block__text h2 { margin-bottom: 18px; }
.about-block__text p { color: var(--c-body); }
.about-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--sh-2);
  aspect-ratio: 4 / 3;
  background: var(--c-soft-2);
}
.about-media img { width: 100%; height: 100%; object-fit: cover; }
.about-media__badge {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 18px 22px;
  background: rgba(0, 26, 66, .9);
  color: #fff;
  max-width: 78%;
}
.about-media__badge strong {
  display: block;
  font-family: var(--font-num);
  font-size: 22px;
  letter-spacing: .04em;
}
.about-media__badge span { font-size: 13px; color: rgba(255, 255, 255, .78); }

.point-list { margin: 22px 0 28px; display: grid; gap: 12px; }
.point-list li {
  position: relative;
  padding-left: 26px;
  color: var(--c-body);
}
.point-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--c-primary);
}

/* 合作案例（文字网格） */
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.case-item {
  display: flex;
  gap: 12px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.case-item:hover {
  border-color: var(--c-primary);
  transform: translateY(-2px);
  box-shadow: var(--sh-1);
}
.case-item__idx {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-primary);
  opacity: .55;
  padding-top: 2px;
  flex: 0 0 auto;
}
.case-item__name { font-size: 15px; color: var(--c-ink); line-height: 1.5; }

/* 新闻列表（首页） */
.news-mini { display: grid; gap: 2px; background: var(--c-line); border-radius: var(--radius); overflow: hidden; }
.news-mini a {
  display: grid;
  grid-template-columns: 108px 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 20px 22px;
  background: #fff;
  transition: background .2s var(--ease);
}
.news-mini a:hover { background: var(--c-soft); }
.news-mini time {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--c-muted);
  letter-spacing: .02em;
}
.news-mini strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-mini .excerpt {
  display: block;
  font-size: 13.5px;
  color: var(--c-muted);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-mini svg { width: 18px; height: 18px; color: var(--c-primary); flex: 0 0 auto; }

/* CTA 通栏 */
.cta-band {
  background: linear-gradient(120deg, var(--c-primary-900), var(--c-primary) 58%, #0d4fa8);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -40%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 111, 217, .55), transparent 62%);
}
.cta-band__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: clamp(36px, 4vw, 56px) 0;
  flex-wrap: wrap;
}
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { color: rgba(255, 255, 255, .82); margin: 0; }
.cta-band__actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 7 组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: background .2s var(--ease), color .2s var(--ease),
    border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
  border: 1px solid transparent;
}
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-700); color: #fff; transform: translateY(-1px); box-shadow: var(--sh-2); }
.btn--ghost { border-color: rgba(0, 54, 134, .28); color: var(--c-primary); background: #fff; }
.btn--ghost:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-soft); }
.btn--light { background: #fff; color: var(--c-primary); }
.btn--light:hover { background: #f2f6fc; color: var(--c-primary-700); transform: translateY(-1px); }
.btn--outline-light { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn--outline-light:hover { background: rgba(255, 255, 255, .14); color: #fff; }

/* 页面头图 */
.page-head {
  position: relative;
  min-height: clamp(220px, 24vw, 320px);
  display: grid;
  align-items: center;
  background-color: var(--c-primary-900);
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}
.page-head::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 18, 46, .86), rgba(0, 34, 82, .58) 55%, rgba(0, 34, 82, .32));
}
.page-head__inner { position: relative; z-index: 2; padding: clamp(40px, 5vw, 64px) 0; }
.page-head h1 { color: #fff; margin-bottom: 10px; }
.page-head .en {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .68);
  display: block;
  margin-bottom: 12px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .72);
  flex-wrap: nowrap;
  overflow: hidden;
}
.breadcrumb > * { flex: 0 0 auto; }
.breadcrumb span[aria-current] {
  flex: 0 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.breadcrumb a { color: rgba(255, 255, 255, .72); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span[aria-current] { color: #fff; }
.breadcrumb svg { width: 12px; height: 12px; opacity: .6; }

/* 侧栏 + 内容 两栏 */
.with-aside {
  display: grid;
  grid-template-columns: 258px minmax(0, 1fr);
  gap: clamp(28px, 3.4vw, 52px);
  align-items: start;
}

.aside-nav {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.aside-nav__title {
  padding: 18px 20px;
  background: var(--c-primary);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
}
.aside-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 15px 20px;
  border-top: 1px solid var(--c-line);
  font-size: 15px;
  color: var(--c-body);
}
.aside-nav a:hover { background: var(--c-soft); color: var(--c-primary); }
.aside-nav a[aria-current="page"] {
  color: var(--c-primary);
  font-weight: 600;
  background: var(--c-soft);
  box-shadow: inset 3px 0 0 var(--c-primary);
}
.aside-nav a svg { width: 14px; height: 14px; opacity: .45; }

.aside-contact {
  margin-top: 20px;
  padding: 24px 20px;
  border-radius: var(--radius);
  background: var(--c-primary-900);
  color: rgba(255, 255, 255, .8);
  font-size: 14px;
}
.aside-contact h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
.aside-contact p { margin-bottom: 6px; }
.aside-contact .tel {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .02em;
  display: block;
  margin: 4px 0 12px;
}

/* 产品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 1.8vw, 24px);
}
.product-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: transparent; }
.product-card__media {
  aspect-ratio: 4 / 3;
  background: var(--c-soft);
  display: grid;
  place-items: center;
  padding: 16px;
}
.product-card__media img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  object-fit: contain;
  transition: transform .35s var(--ease);
}
.product-card:hover .product-card__media img { transform: scale(1.05); }
.product-card__body { padding: 18px 20px 20px; border-top: 1px solid var(--c-line); }
.product-card__body h3 { font-size: 16px; line-height: 1.5; margin-bottom: 8px; }
.product-card__body span {
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--c-muted);
}

.group-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 22px;
}
.group-title h2 { font-size: clamp(20px, 1.8vw, 26px); }
.group-title span {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.product-group + .product-group { margin-top: clamp(36px, 4vw, 56px); }

/* 产品详情 */
.product-detail {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}
.gallery__main {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--c-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: hidden;
}
.gallery__main img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.gallery__thumbs {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.gallery__thumb {
  width: 82px;
  height: 66px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-soft);
  padding: 4px;
  display: grid;
  place-items: center;
  transition: border-color .2s var(--ease);
}
.gallery__thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
.gallery__thumb[aria-selected="true"] { border-color: var(--c-primary); box-shadow: 0 0 0 1px var(--c-primary); }

.spec-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  margin: 20px 0 26px;
  font-size: 15px;
}
.spec-table caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--c-muted);
  letter-spacing: .06em;
  padding: 0 0 10px;
}

.spec-table th,
.spec-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--c-line);
  text-align: left;
  vertical-align: top;
}
.spec-table th {
  width: 34%;
  color: var(--c-muted);
  font-weight: 400;
  background: var(--c-soft);
  white-space: nowrap;
}
.spec-table td { color: var(--c-ink); width: 66%; word-break: break-word; }

.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }

/* 新闻列表页 */
.news-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 8px;
}
.news-toolbar__count { font-size: 14px; color: var(--c-muted); }
.news-toolbar__count b { color: var(--c-primary); font-family: var(--font-num); }

.news-list { display: grid; }
.news-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-line);
}
.news-item__date {
  background: var(--c-soft);
  border-radius: var(--radius-sm);
  text-align: center;
  padding: 12px 6px;
  align-self: start;
}
.news-item__date .d {
  display: block;
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-primary);
}
.news-item__date .ym {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--c-muted);
  margin-top: 6px;
}
.news-item h3 { font-size: 17px; margin-bottom: 8px; }
.news-item p {
  color: var(--c-body);
  font-size: 14.5px;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--c-primary);
}
.news-item__more svg { width: 13px; height: 13px; }

.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.pager button,
.pager a {
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: var(--font-num);
  color: var(--c-body);
  background: #fff;
  transition: all .2s var(--ease);
}
.pager button:hover:not(:disabled),
.pager a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pager [aria-current="page"] {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}
.pager button:disabled { opacity: .45; cursor: not-allowed; }

/* 文章页 */
.article { max-width: 820px; margin: 0 auto; }
.article__head { border-bottom: 1px solid var(--c-line); padding-bottom: 22px; margin-bottom: 28px; }
.article__meta {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: var(--c-muted);
  margin-top: 14px;
}
.article__meta span { display: inline-flex; align-items: center; gap: 6px; }
.article__meta svg { width: 14px; height: 14px; }
.article__body { font-size: 16.5px; line-height: 1.95; color: #33465a; }
.article__body p { margin-bottom: 1.1em; }
.article__body figure { margin: 26px 0; }
.article__body img { border-radius: var(--radius); margin: 0 auto; }
.article__body figcaption { font-size: 13px; color: var(--c-muted); text-align: center; margin-top: 8px; }
.article-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--c-line);
}
.article-nav a {
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--c-body);
  display: block;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.article-nav a:hover { border-color: var(--c-primary); background: var(--c-soft); }
.article-nav span { display: block; font-size: 12.5px; color: var(--c-muted); margin-bottom: 4px; }

/* 时间轴 */
.timeline { position: relative; margin-top: 8px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 92px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-soft-2));
}
.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 28px;
  padding: 0 0 26px;
}
.timeline__year {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.4;
  text-align: left;
}
.timeline__body {
  position: relative;
  padding: 0 0 0 24px;
  font-size: 15px;
  color: var(--c-body);
}
.timeline__body::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--c-primary);
}

/* 荣誉证书 */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 1.6vw, 22px);
}
.honor-item {
  display: block;
  padding: 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.honor-item:hover { transform: translateY(-3px); box-shadow: var(--sh-2); }
.honor-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--c-soft);
  border-radius: var(--radius-sm);
}
.honor-item span {
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--c-muted);
  margin-top: 10px;
}

/* 联系页 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}
.contact-card {
  padding: 28px 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: #fff;
}
.contact-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--c-soft);
  color: var(--c-primary);
  margin-bottom: 16px;
}
.contact-card__icon svg { width: 20px; height: 20px; }
.contact-card h3 { font-size: 16px; margin-bottom: 8px; }
.contact-card p { margin: 0; color: var(--c-body); font-size: 15px; word-break: break-word; }
.contact-card .big {
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: .01em;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 3vw, 44px);
  margin-top: clamp(28px, 3vw, 44px);
  align-items: stretch;
}
.contact-info-box {
  padding: clamp(24px, 3vw, 36px);
  background: var(--c-soft);
  border-radius: var(--radius-lg);
}
.contact-info-box h2 { font-size: clamp(20px, 1.8vw, 26px); margin-bottom: 18px; }
.contact-info-box dl { margin: 0; display: grid; gap: 16px; }
.contact-info-box dt { font-size: 13px; color: var(--c-muted); letter-spacing: .06em; margin-bottom: 3px; }
.contact-info-box dd { margin: 0; font-size: 15.5px; color: var(--c-ink); }
.contact-photo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-soft-2);
  min-height: 260px;
}
.contact-photo img { width: 100%; height: 100%; object-fit: cover; }

/* 企业文化 */
.culture-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 60px);
  align-items: center;
}
.culture-lines { display: grid; gap: 14px; margin: 0; }
.culture-lines li {
  position: relative;
  padding-left: 22px;
  font-size: clamp(15.5px, 1.2vw, 18px);
  color: var(--c-ink);
  line-height: 1.75;
}
.culture-lines li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 2px;
  background: var(--c-primary);
}
.culture-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--sh-2);
}
.culture-img img { width: 100%; height: 100%; object-fit: cover; }

.value-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.value-card {
  padding: 30px 26px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  border-top: 3px solid var(--c-primary);
}
.value-card h3 { font-size: 18px; margin-bottom: 10px; }
.value-card p { margin: 0; font-size: 14.5px; color: var(--c-body); }

/* 项目实景照片墙 */
.photo-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(12px, 1.4vw, 18px); }
.photo-card {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-soft-2);
  aspect-ratio: 4 / 3;
}
.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s var(--ease);
}
.photo-card:hover img { transform: scale(1.05); }

/* 品牌主张 */
.claim-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.claim-card {
  padding: 32px 26px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-align: center;
  transition: box-shadow .25s var(--ease), transform .25s var(--ease);
}
.claim-card:hover { box-shadow: var(--sh-2); transform: translateY(-3px); }
.claim-card img { width: 72px; height: 72px; object-fit: contain; margin: 0 auto 16px; }
.claim-card h3 { font-size: 18px; }
.claim-card p { margin: 8px 0 0; font-size: 14.5px; color: var(--c-body); }

/* 灯塔 / 灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: rgba(4, 12, 24, .86);
  backdrop-filter: blur(2px);
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: 92vw; max-height: 88vh; border-radius: var(--radius); box-shadow: var(--sh-3); }
.lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .14);
  color: #fff;
  display: grid;
  place-items: center;
}
.lightbox__close:hover { background: rgba(255, 255, 255, .28); }
.lightbox__close svg { width: 20px; height: 20px; }

/* 返回顶部 */
.to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: var(--sh-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--c-primary-700); color: #fff; }
.to-top svg { width: 18px; height: 18px; }

/* 空状态 */
.empty {
  padding: 60px 20px;
  text-align: center;
  color: var(--c-muted);
  background: var(--c-soft);
  border-radius: var(--radius);
}

/* ---------- 8 页脚 ---------- */
.site-footer {
  background: var(--c-primary-900);
  color: rgba(255, 255, 255, .72);
  font-size: 14px;
}
.footer__main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(44px, 5vw, 64px) 0 40px;
}
.footer__brand img {
  height: 42px;
  width: auto;
  margin-bottom: 16px;
  background: #fff;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
}
.footer__brand p { margin: 0 0 8px; line-height: 1.8; max-width: 34ch; }
.footer h3 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
  letter-spacing: .04em;
}
.footer__links { display: grid; gap: 10px; }
.footer__links a { color: rgba(255, 255, 255, .72); }
.footer__links a:hover { color: #fff; }
.footer__contact { display: grid; gap: 12px; }
.footer__contact .tel {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .02em;
}
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
}

/* ---------- 9 响应式 ---------- */
@media (max-width: 1080px) {
  .footer__main { grid-template-columns: 1fr 1fr; }
  .honor-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .case-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .with-aside { grid-template-columns: 220px minmax(0, 1fr); }
}

@media (max-width: 900px) {
  :root { --header-h: 68px; }

  .topbar__left .topbar__item:last-child { display: none; }

  .nav-toggle { display: flex; }

  .nav {
    position: fixed;
    inset: calc(var(--header-h) + 38px) 0 auto 0;
    display: block;
    background: #fff;
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--sh-2);
    max-height: calc(100vh - var(--header-h) - 38px);
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }

  .nav__list { display: block; padding: 8px 16px 16px; }
  .nav__item { border-bottom: 1px solid var(--c-line); }
  .nav__link {
    line-height: 1.4;
    padding: 15px 4px;
    font-size: 16px;
  }
  .nav__link::after { display: none; }
  .nav__sub {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    padding: 0 0 8px 12px;
    min-width: 0;
  }
  .nav__sub a { padding: 10px 12px; font-size: 15px; color: var(--c-body); }

  .header__cta { display: none; }

  .brand img { height: 40px; }

  .hero__track { aspect-ratio: 16 / 11; max-height: none; }
  .hero__content { max-width: 100%; padding-right: 8%; }
  .hero__slide--text::after {
    background: linear-gradient(180deg, rgba(255, 255, 255, .95) 0%, rgba(255, 255, 255, .82) 62%, rgba(255, 255, 255, .55) 100%);
  }
  .hero__arrow { display: none; }

  .grid--4, .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-block { grid-template-columns: 1fr; }
  .about-media { aspect-ratio: 16 / 10; order: -1; }
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-detail { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-panel { grid-template-columns: 1fr; }
  .culture-hero { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .claim-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .with-aside { grid-template-columns: 1fr; }
  .aside-nav { position: static; }
  .aside-contact { display: none; }

  .news-mini a { grid-template-columns: 1fr auto; gap: 12px; }
  .news-mini time { grid-column: 1; font-size: 12.5px; }
  .news-mini .excerpt { display: none; }

  .timeline::before { left: 62px; }
  .timeline__item { grid-template-columns: 62px minmax(0, 1fr); gap: 16px; }
  .timeline__year { font-size: 17px; }
  .timeline__body { padding-left: 18px; font-size: 14.5px; }

  .footer__main { grid-template-columns: 1fr; gap: 28px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 620px) {
  .container { padding: 0 18px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats__inner { grid-template-columns: 1fr; }
  .stats__item { padding: 20px; }
  .case-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .brand img { height: 34px; }
  .hero__title { font-size: 26px; }
  .hero__subtitle { font-size: 14.5px; }
  .hero__eyebrow { display: none; }
  .news-item { grid-template-columns: 62px minmax(0, 1fr); gap: 16px; }
  .news-item h3 { font-size: 15.5px; }
  .article-nav { grid-template-columns: 1fr; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- 10 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

/* 无 JS 时的兜底：第一屏始终可见 */
.no-js .hero__slide:first-child { opacity: 1; visibility: visible; }