/* ===================== 上海氢投 · 科技蓝主题 ===================== */
:root {
  --bg-deep: #0c2e63;
  --bg-deep-2: #0f3a7b;
  --bg-deep-3: #124693;
  --blue: #2f80ed;
  --blue-2: #1e63d8;
  --cyan: #55a9ff;
  --grad: linear-gradient(120deg, #2f80ed 0%, #55a9ff 100%);
  --ink: #0b1a33;
  --muted: #5a6b85;
  --light: #eef3fc;
  --line: #dfe8f5;
  --white: #ffffff;
  --glow: 0 0 24px rgba(47, 128, 237, .42);
  --shadow: 0 14px 44px rgba(9, 44, 110, .12);
  --shadow-sm: 0 4px 20px rgba(9, 44, 110, .08);
  --radius: 16px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===================== 布局 ===================== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 32px 0; }
.section-alt { background: var(--light); }

.sec-head { text-align: center; margin-bottom: 32px; }
.sec-kicker {
  font-size: 13px; letter-spacing: 4px; font-weight: 700;
  color: var(--blue); text-transform: uppercase; margin-bottom: 12px;
}
/* 小标题上方的英文标签已删除（保留首页 banner 中文 kicker） */
.sec-head .sec-kicker, .series-head .sec-kicker { display: none; }
.sec-head h2 { font-size: 40px; font-weight: 800; color: var(--ink); line-height: 1.2; margin-bottom: 14px; }
.sec-sub { font-size: 17px; color: var(--muted); }

/* ===================== 按钮 ===================== */
.btn {
  display: inline-block; padding: 14px 34px; border-radius: 40px;
  font-size: 16px; font-weight: 600; letter-spacing: 1px; cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 26px rgba(47, 128, 237, .4); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(47, 128, 237, .55); }
.btn-ghost { background: rgba(255,255,255,.65); color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: rgba(255,255,255,.9); border-color: var(--blue); transform: translateY(-3px); }
.btn-outline { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; transform: translateY(-3px); }

/* ===================== 导航 ===================== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; transition: background .35s, box-shadow .35s; }
.nav-inner { max-width: 1360px; margin: 0 auto; padding: 0 24px; height: 78px; display: flex; align-items: center; justify-content: space-between; }
.nav-right { display: flex; align-items: center; gap: 8px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo { height: 40px; width: auto; }
.brand .logo-dark { display: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text em { font-style: normal; font-weight: 800; font-size: 18px; color: #fff; letter-spacing: 1px; transition: color .3s; }
.brand-text i { font-style: normal; font-size: 9.5px; letter-spacing: 1.4px; color: rgba(255,255,255,.6); transition: color .3s; }

/* 一级菜单 */
.menu { display: flex; align-items: center; }
.menu ul { list-style: none; display: flex; align-items: center; gap: 2px; }
.menu > ul > li { position: relative; }
.menu > ul > li > a {
  display: block; position: relative; color: rgba(255,255,255,.88); font-size: 17px; font-weight: 500;
  padding: 12px 16px; line-height: 1.6; white-space: nowrap; transition: color .3s;
}
.menu > ul > li > a::after {
  content: ""; position: absolute; left: 16px; bottom: 6px; height: 2px; border-radius: 2px;
  background: var(--grad); width: 0; opacity: 0; transition: width .3s ease, opacity .3s ease;
}
.menu > ul > li > a:hover { color: #fff; }
.menu > ul > li > a:hover::after { width: calc(100% - 32px); opacity: 1; }
.menu > ul > li.active > a { color: var(--cyan); }
.menu > ul > li.active > a::after { width: calc(100% - 32px); opacity: 1; }

/* 下拉菜单（多级，悬停展开） */
.menu .submenu {
  position: absolute; top: 100%; left: 50%; min-width: 200px; padding: 8px 0;
  background: #fff; border-radius: 10px; box-shadow: 0 18px 50px rgba(9,44,110,.16);
  list-style: none; opacity: 0; visibility: hidden; pointer-events: none;
  transform: translateX(-50%) translateY(14px); transition: opacity .28s ease, transform .28s ease, visibility .28s;
}
.menu .submenu::before { content: ""; position: absolute; top: -14px; left: 0; right: 0; height: 14px; }
.menu li:hover > .submenu { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(6px); }
.menu .submenu li { position: relative; }
.menu .submenu a {
  display: block; padding: 10px 24px; font-size: 14px; font-weight: 500; color: var(--ink);
  white-space: nowrap; transition: color .25s, background .25s, padding-left .25s;
}
.menu .submenu a:hover { color: var(--blue); background: var(--light); padding-left: 30px; }
.menu .submenu li.active > a { color: var(--cyan); }
.menu .submenu li.active > a:hover { color: var(--cyan); }

/* 二级/多级子菜单（向右展开） */
.menu .submenu .submenu { top: -8px; left: 100%; transform: translateX(14px); }
.menu .submenu li:hover > .submenu { transform: translateX(6px); }

/* 语言切换 */
.lang-toggle {
  margin-left: 10px; display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid rgba(255,255,255,.4); color: #fff; background: rgba(255,255,255,.06);
  padding: 7px 16px; border-radius: 30px; font-size: 13px; font-weight: 700; letter-spacing: 1px;
  cursor: pointer; transition: all .25s;
}
.lang-toggle:hover { background: rgba(255,255,255,.16); }
.lang-toggle .globe { font-size: 15px; }

/* 汉堡按钮 */
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; position: relative; z-index: 101; }
.hamburger span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: background .3s, transform .3s, opacity .3s; }

/* 滚动状态：白底 + 深色文字 + 深色 Logo */
.nav.scrolled { background: #fff; box-shadow: 0 4px 24px rgba(9,44,110,.14); }
.nav.scrolled .brand .logo-light { display: none; }
.nav.scrolled .brand .logo-dark { display: block; }
.nav.scrolled .brand-text em { color: #0E6EB8; }
.nav.scrolled .brand-text i { color: #4a90c9; }
.nav.scrolled .menu > ul > li > a { color: var(--ink); }
.nav.scrolled .menu > ul > li > a:hover { color: var(--blue-2); }
.nav.scrolled .menu > ul > li.active > a { color: var(--blue-2); }
.nav.scrolled .lang-toggle { border-color: var(--line); color: var(--ink); background: rgba(47,128,237,.05); }
.nav.scrolled .lang-toggle:hover { background: rgba(47,128,237,.10); }
.nav.scrolled .hamburger span { background: var(--ink); }
body.menu-open .hamburger span { background: #fff; }

/* ===================== 首页 Banner 轮播 ===================== */
.banner { position: relative; height: 78vh; min-height: 480px; overflow: hidden; }
.banner-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1.1s ease; }
.banner-slide.active { opacity: 1; }
.banner-slide img { width: 100%; height: 100%; object-fit: cover; }
/* 轮播文字：图下方独立区，随轮播切换 */
.banner-caption { padding: 40px 0 46px; background: var(--white); border-bottom: 1px solid var(--line); }
.caption-item { display: none; text-align: center; }
.caption-item.active { display: block; }
.banner-caption h1 { font-size: 38px; font-weight: 800; color: var(--ink); line-height: 1.22; letter-spacing: 1px; margin-bottom: 12px; }
.banner-caption h1 span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.banner-sub { font-size: 18px; color: #34465e; max-width: 720px; margin-left: auto; margin-right: auto; }
.caption-foot { display: flex; align-items: center; justify-content: center; gap: 28px; margin-top: 26px; flex-wrap: wrap; }
.banner-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.banner-badges span { font-size: 13px; color: #0c2e63; padding: 6px 16px; border: 1px solid rgba(12,46,99,.35); border-radius: 30px; background: var(--light); }
.banner-actions { display: flex; gap: 16px; }

.banner-controls { position: absolute; bottom: 44px; left: 0; right: 0; z-index: 3; display: flex; align-items: center; justify-content: center; gap: 20px; }
.banner-dots { display: flex; gap: 10px; }
.banner-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(12,46,99,.35); cursor: pointer; transition: all .3s; border: none; }
.banner-dot.active { width: 30px; border-radius: 6px; background: #0c2e63; }
.banner-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 3; width: 52px; height: 52px;
  border-radius: 50%; border: 1px solid rgba(12,46,99,.4); background: rgba(255,255,255,.55); color: #0c2e63;
  font-size: 22px; cursor: pointer; transition: all .3s; display: flex; align-items: center; justify-content: center; }
.banner-arrow:hover { background: var(--grad); border-color: transparent; color: #fff; }
.banner-arrow.prev { left: 28px; }
.banner-arrow.next { right: 28px; }

/* ===================== 子页面 Page Hero（与导航同高的蓝色底条） ===================== */
.page-hero { position: relative; height: 78px; padding: 0; overflow: hidden;
  background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-deep-2) 55%, var(--bg-deep-3) 100%); }
.page-hero::before { content: ""; position: absolute; inset: 0;
  background: radial-gradient(700px 400px at 80% 0%, rgba(85,169,255,.18), transparent 60%),
              radial-gradient(600px 400px at 10% 100%, rgba(47,128,237,.22), transparent 60%); }

/* ===================== 首页内容块 ===================== */
.intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: stretch; }
.intro-copy { display: flex; flex-direction: column; }
.intro-copy p { font-size: 16.5px; color: var(--muted); margin-bottom: 18px; }
.intro-copy strong { color: var(--ink); }
.intro-copy .btn { margin-top: auto; align-self: flex-start; }
.intro-mission { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-content: stretch; }
.mission-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: transform .3s, box-shadow .3s; }
.mission-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.mission-card h3 { font-size: 14px; color: var(--blue); margin-bottom: 8px; font-weight: 700; }
.mission-card p { font-size: 14.5px; color: var(--ink); font-weight: 600; }

.stats-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; margin-top: 56px; }
.stat-figure { text-align: center; padding: 32px 10px; border-radius: var(--radius); background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm); position: relative; overflow: hidden; transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; }
.stat-figure:hover { transform: translateY(-6px); border-color: var(--blue); box-shadow: var(--shadow); }
.stat-figure b { display: block; font-size: 38px; font-weight: 800; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-figure span { font-size: 15px; color: var(--muted); margin-top: 12px; display: block; }

.highlight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 20px; }
.highlight { position: relative; border-radius: var(--radius); overflow: hidden; height: 340px; }
.highlight img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.highlight:hover img { transform: scale(1.08); }
.highlight::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(12,46,99,.1), rgba(12,46,99,.85)); }
.highlight-body { position: absolute; bottom: 0; left: 0; right: 0; padding: 24px; z-index: 1; color: #fff; }
.highlight-body h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.highlight-body p { font-size: 14px; color: rgba(255,255,255,.8); margin-bottom: 12px; }
.highlight-body .link { color: var(--cyan); font-weight: 700; font-size: 14px; }
.highlight-body .link:hover { text-decoration: underline; }

/* ===================== 卡片 ===================== */
.tech-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tech-card { background: var(--white); border-radius: var(--radius); padding: 26px 22px; border: 1px solid var(--line); transition: transform .3s, box-shadow .3s; }
.tech-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.tech-card i { display: block; font-style: normal; font-size: 17px; font-weight: 700; color: var(--ink); margin-bottom: 10px; padding-bottom: 10px; border-bottom: 2px solid var(--cyan); }
.tech-card p { font-size: 14.5px; color: var(--muted); }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); transition: transform .3s, box-shadow .3s; display: flex; flex-direction: column; }
.product:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-img { background: #fff; padding: 20px; display: flex; align-items: center; justify-content: center; height: 220px; }
.product-img img { max-height: 180px; width: auto; object-fit: contain; }
.product-body { padding: 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.product-tag { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--blue); background: rgba(47,128,237,.1); padding: 4px 12px; border-radius: 20px; width: fit-content; }
.product h3 { font-size: 20px; font-weight: 800; color: var(--ink); }
.product p { font-size: 14.5px; color: var(--muted); flex: 1; }
.spec-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.spec-chips span { font-size: 13px; font-weight: 600; color: var(--bg-deep-2); background: var(--light); border: 1px solid var(--line); padding: 5px 12px; border-radius: 20px; }

.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.app { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); transition: transform .3s, box-shadow .3s; }
.app:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.app-img { height: 180px; overflow: hidden; background: var(--white); }
.app-img img { width: 100%; height: 100%; object-fit: contain; display: block; }
.app-body { padding: 22px 26px 26px; }
.app h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 10px; text-align: center; }
.app p { font-size: 14.5px; color: var(--muted); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); transition: transform .3s, box-shadow .3s; display: flex; flex-direction: column; }
.case:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-img { overflow: hidden; height: 210px; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case:hover .case-img img { transform: scale(1.06); }
.case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.case-body h3 { font-size: 19px; font-weight: 800; color: var(--ink); }
.case-body p { font-size: 14.5px; color: var(--muted); flex: 1; }
.case-tag { font-size: 12.5px; font-weight: 700; color: var(--blue); background: rgba(47,128,237,.1); padding: 4px 12px; border-radius: 20px; width: fit-content; }
.case-more { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 28px; }
.case-more-item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.case-more-item b { display: block; font-size: 16px; color: var(--ink); margin-bottom: 6px; }
.case-more-item p { font-size: 13.5px; color: var(--muted); }

.honor-feature { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; margin-bottom: 44px;
  background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 40px; }
.honor-kicker { font-size: 18px; font-weight: 800; color: var(--blue); letter-spacing: 2px; margin-bottom: 12px; }
.honor-feature-left h3 { font-size: 26px; font-weight: 800; color: var(--ink); margin-bottom: 14px; }
.honor-feature-left p { font-size: 16px; color: var(--muted); }
.honor-feature-left b { color: var(--ink); }
.honor-feature-right { display: grid; gap: 14px; }
.honor-badge { display: flex; align-items: center; gap: 16px; background: var(--light); border-radius: 14px; padding: 18px 20px; }
.honor-badge b { font-size: 22px; font-weight: 800; color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text; min-width: 64px; }
.honor-badge span { font-size: 15px; color: var(--ink); font-weight: 600; }
.honor-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.honor { text-align: center; border: 1px solid var(--line); border-radius: 14px; padding: 22px 10px; background: var(--white); transition: transform .3s, box-shadow .3s; }
.honor:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.honor b { display: block; font-size: 18px; color: var(--blue); margin-bottom: 4px; }
.honor span { font-size: 17px; color: var(--ink); font-weight: 600; }

/* ===================== 荣誉照片画廊（完整展示卡片） ===================== */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.gallery-grid-5 { grid-template-columns: repeat(5, 1fr); margin-top: 28px; gap: 20px; }
.gallery-item { position: relative; border-radius: 16px; overflow: hidden; background: #fff; border: 1px solid var(--line); cursor: pointer; transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease; display: flex; flex-direction: column; }
.gallery-item:hover { transform: translateY(-6px); border-color: var(--blue); box-shadow: 0 18px 44px rgba(9,44,110,.16), 0 0 0 1px rgba(85,169,255,.18); }
.gallery-item .g-thumb { aspect-ratio: 16 / 10; overflow: hidden; background: #fff; display: flex; align-items: center; justify-content: center; padding: 0; }
.gallery-grid-5 .g-thumb { aspect-ratio: 3 / 4; padding: 8px; }
.gallery-item .g-thumb img { width: 100%; height: 100%; object-fit: contain; transition: transform .5s ease; }
.gallery-item:hover .g-thumb img { transform: scale(1.05); }
.gallery-item::after { content: "+"; position: absolute; top: 12px; right: 12px; z-index: 3; width: 32px; height: 32px; border-radius: 50%; background: rgba(85,169,255,.92); color: #08204f; font-size: 19px; line-height: 32px; text-align: center; opacity: 0; transform: scale(.6); transition: opacity .3s ease, transform .3s ease; }
.gallery-item:hover::after { opacity: 1; transform: scale(1); }

/* 灯箱 */
.lightbox { position: fixed; inset: 0; z-index: 200; background: rgba(12,46,99,.94); display: none; align-items: center; justify-content: center; padding: 48px; }
.lightbox.show { display: flex; }
.lightbox .lb-img { max-width: 100%; max-height: 86vh; border-radius: 8px; box-shadow: 0 24px 70px rgba(0,0,0,.6); }
.lightbox .lb-close { position: absolute; top: 22px; right: 28px; width: 46px; height: 46px; border-radius: 50%; border: 1px solid rgba(255,255,255,.4); background: rgba(255,255,255,.1); color: #fff; font-size: 26px; line-height: 1; cursor: pointer; transition: background .3s, transform .3s; }
.lightbox .lb-close:hover { background: rgba(255,255,255,.25); transform: rotate(90deg); }
.lightbox .lb-caption { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.92); font-size: 15px; font-weight: 600; text-align: center; max-width: 90%; }

.partner-group h3 { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 16px; }
.partner-groups { display: grid; gap: 32px; }
.partner-tags { display: flex; flex-wrap: wrap; gap: 12px; }
.partner-tags span { font-size: 15px; color: var(--muted); background: var(--white); border: 1px solid var(--line); border-radius: 30px; padding: 10px 22px; font-weight: 500; transition: all .3s; }
.partner-tags span:hover { color: var(--blue); border-color: var(--blue); background: rgba(47,128,237,.06); transform: translateY(-3px); }

/* 合作伙伴 logo 墙 */
.logo-wall { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.logo-tile { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; min-height: 104px; background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 10px 10px; transition: all .3s; }
.logo-tile:hover { border-color: var(--blue); transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.logo-tile img { height: 62px; width: auto; max-width: 150px; object-fit: contain; }
.logo-tile span { font-size: 12.5px; color: var(--muted); font-weight: 600; }

/* ===================== 时间轴 ===================== */
.timeline { display: grid; grid-template-columns: repeat(6, 1fr); position: relative; margin: 20px -24px 0; }
.timeline::before { content: ""; position: absolute; top: 50%; left: 1.5%; right: 1.5%; height: 2px; background: var(--line); transform: translateY(-50%); }
.tl-item { position: relative; display: grid; grid-template-rows: 1fr auto 1fr; min-height: 260px; }
.tl-dot { grid-row: 2; justify-self: center; width: 16px; height: 16px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 0 4px #fff, 0 0 0 5px var(--line); }
.tl-top { grid-row: 1; display: flex; flex-direction: column; align-items: center; text-align: center; padding: 0; }
.tl-bottom { grid-row: 3; display: flex; flex-direction: column; align-items: center; text-align: center; padding: 0; }
.tl-top.tl-near { justify-content: flex-end; padding-bottom: 16px; }
.tl-top.tl-far { justify-content: flex-start; padding-top: 16px; }
.tl-bottom.tl-near { justify-content: flex-start; padding-top: 16px; }
.tl-bottom.tl-far { justify-content: flex-end; padding-bottom: 16px; }
.tl-item b { font-size: 17px; font-weight: 800; color: var(--blue); }
.tl-item p { font-size: 13px; color: var(--muted); line-height: 1.55; }

/* ===================== 发展布局 ===================== */
.layout-map { max-width: 880px; margin: 0 auto; }
.layout-map img { width: 100%; height: auto; filter: drop-shadow(0 16px 36px rgba(9,44,110,.16)); transition: transform .5s ease, filter .5s ease; }
.layout-map:hover img { transform: scale(1.02); filter: drop-shadow(0 22px 46px rgba(9,44,110,.22)) drop-shadow(0 0 30px rgba(85,169,255,.14)); }

/* ===================== 产业布局 + 分支机构 ===================== */
.layout-row { display: grid; grid-template-columns: 1.15fr 1fr; gap: 44px; align-items: center; max-width: 1080px; margin: 0 auto; }
.layout-row .layout-map { max-width: none; margin: 0; }
.branch-panel { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 32px; box-shadow: var(--shadow-sm); }
.branch-panel h3 { font-size: 21px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.branch-panel h3::after { content: ""; display: block; width: 44px; height: 3px; background: var(--grad); border-radius: 2px; margin-top: 10px; }
.branch-list { list-style: none; margin-top: 20px; display: flex; flex-direction: column; }
.branch-list li { display: flex; flex-direction: column; gap: 3px; padding: 15px 0; border-bottom: 1px dashed var(--line); }
.branch-list li:last-child { border-bottom: none; padding-bottom: 0; }
.branch-list b { display: block; font-size: 13px; font-weight: 700; color: var(--blue); letter-spacing: 1px; }
.branch-list span { display: block; font-size: 15.5px; font-weight: 600; color: var(--ink); }
@media (max-width: 860px) { .layout-row { grid-template-columns: 1fr; gap: 28px; } }

/* ===================== 旗舰产品 ===================== */
.flagship { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
  background: var(--white); border: 1px solid var(--line); border-radius: 24px; padding: 52px; overflow: hidden; position: relative; margin-top: 60px; }
.flagship::before { content: ""; position: absolute; inset: 0; background: radial-gradient(500px 500px at 90% 10%, rgba(47,128,237,.07), transparent 60%); pointer-events: none; }
.flagship-art { position: relative; z-index: 1; }
.flagship-art img { border-radius: 16px; box-shadow: 0 16px 40px rgba(9,44,110,.18); }
.flagship-copy { position: relative; z-index: 1; }
.flagship-copy h3 { font-size: 34px; font-weight: 800; color: var(--ink); margin-bottom: 6px; }
.flagship-copy h3 span { display: block; font-size: 15px; letter-spacing: 3px; color: var(--blue); font-weight: 600; margin-top: 4px; }
.flagship-lead { font-size: 16px; color: var(--muted); margin-bottom: 20px; }
.flagship-feats { list-style: none; margin-bottom: 28px; }
.flagship-feats li { color: var(--ink); font-size: 15.5px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.flagship-feats b { color: var(--blue); }
.flagship .product-tag { background: rgba(47,128,237,.1); color: var(--blue); margin-bottom: 12px; }

/* 氢能万里行 数据 */
.journey-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 20px; }
.journey-stats div { text-align: center; background: var(--light); border: 1px solid var(--line); border-radius: 12px; padding: 18px 8px; }
.journey-stats b { display: block; font-size: 26px; font-weight: 800; color: var(--blue); }
.journey-stats span { font-size: 12px; color: var(--muted); }

/* ===================== 表格 ===================== */
.spec-table { width: 100%; border-collapse: collapse; background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.spec-table th, .spec-table td { padding: 14px 18px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
.spec-table thead th { background: var(--bg-deep-2); color: #fff; font-weight: 700; }
.spec-table tbody tr:hover { background: var(--light); }
.spec-table td:first-child { font-weight: 700; color: var(--ink); }

/* ===================== 联系我们表单 ===================== */
.contact-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 56px; }
.contact-card { text-align: center; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px 24px; transition: transform .3s, box-shadow .3s; }
.contact-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.contact-main { border: 2px solid var(--blue); background: linear-gradient(180deg, #fff 0%, #eaf2fc 100%); }
.contact-ic { font-size: 38px; margin-bottom: 14px; }
.contact-card h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.contact-card p { font-size: 15px; color: var(--muted); }
.contact-tel { margin: 8px 0; }
.contact-tel a { font-size: 26px; font-weight: 800; color: var(--blue); }
.contact-card a:hover { text-decoration: underline; }

.form-panel { max-width: 720px; margin: 0 auto; }
.form-toggle {
  display: flex; align-items: center; gap: 16px;
  width: 100%; padding: 24px 28px;
  background: linear-gradient(120deg, var(--bg-deep-2) 0%, var(--bg-deep-3) 100%);
  border: none; border-radius: 18px; cursor: pointer;
  color: #fff; text-align: left; font-family: var(--font);
  box-shadow: 0 14px 36px rgba(9,44,110,.18);
  transition: transform .3s, box-shadow .3s;
}
.form-toggle:hover { transform: translateY(-3px); box-shadow: 0 20px 44px rgba(9,44,110,.24); }
.form-toggle-ic { font-size: 30px; }
.form-toggle-txt { display: flex; flex-direction: column; gap: 5px; flex: 1; }
.form-toggle-txt b { font-size: 19px; font-weight: 800; letter-spacing: 1px; }
.form-toggle-txt i { font-style: normal; font-size: 13.5px; color: rgba(255,255,255,.72); }
.form-toggle-arrow { font-size: 20px; transition: transform .35s; }
.form-toggle.open .form-toggle-arrow { transform: rotate(180deg); }
.form-collapse {
  background: var(--white); border: 1px solid var(--line); border-radius: 18px;
  padding: 36px 32px; margin-top: 18px; box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 13px 16px; font-size: 15px; color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px; font-family: var(--font); transition: border .25s, box-shadow .25s;
  background: var(--light);
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(47,128,237,.14); background: #fff; }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; padding: 15px; font-size: 16px; }
.form-ok { display: none; margin-top: 16px; text-align: center; padding: 14px; border-radius: 10px;
  background: #e8f9f1; color: #0a8a4a; font-weight: 600; font-size: 15px; }

/* ===================== 页脚 ===================== */
.footer { background: var(--bg-deep); color: rgba(255,255,255,.7); padding-top: 48px; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px 36px; display: grid; grid-template-columns: 3fr 2fr 3fr 2fr; gap: 32px; align-items: stretch; }
.footer-brand img { height: 44px; width: auto; margin-bottom: 20px; display: block; }
.footer-brand p { font-size: 15px; }
.footer-motto { color: var(--cyan); margin-top: 12px; letter-spacing: 2px; }
.footer-links { display: flex; flex-direction: column; justify-content: space-between; }
.footer-links a { font-size: 15px; line-height: 1.8; transition: color .25s; }
.footer-links a:hover { color: var(--cyan); }
.footer-contact { display: flex; flex-direction: column; justify-content: space-between; }
.footer-contact p { font-size: 15px; line-height: 1.8; }
.footer-qr { display: flex; flex-direction: column; align-items: flex-end; justify-content: center; }
.footer-qr img { width: 112px; height: 112px; border-radius: 10px; background: #fff; padding: 5px; box-shadow: 0 4px 16px rgba(0,0,0,.3); }
.footer-qr span { display: block; width: 112px; text-align: center; margin-top: 8px; font-size: 13px; color: rgba(255,255,255,.75); letter-spacing: 1px; }
.footer-branch h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 14px; letter-spacing: 1px; }
.footer-branch ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-branch li { font-size: 15px; color: rgba(255,255,255,.7); line-height: 1.5; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); text-align: center; padding: 12px; font-size: 13px; color: rgba(255,255,255,.45); }
.footer-icp { margin-left: 10px; color: rgba(255,255,255,.45); text-decoration: none; }
.footer-icp:hover { color: rgba(255,255,255,.8); }

/* ===================== 返回顶部 ===================== */
.to-top { position: fixed; right: 26px; bottom: 26px; z-index: 90; width: 48px; height: 48px;
  border-radius: 50%; border: none; background: var(--grad); color: #fff; font-size: 20px; cursor: pointer;
  box-shadow: 0 8px 24px rgba(47,128,237,.45); opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .3s; }
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { transform: translateY(-3px); }

/* ===================== 动画 ===================== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
  .banner-caption h1 { font-size: 34px; }
  .tech-cards { grid-template-columns: repeat(2, 1fr); }
  .stats-strip { grid-template-columns: repeat(3, 1fr); }
  .case-more { grid-template-columns: repeat(2, 1fr); }
  .honor-list { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .logo-wall { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 860px) {
  .section { padding: 24px 0; }
  .sec-head h2 { font-size: 32px; }
  .hamburger { display: flex; }
  .menu { position: fixed; top: 0; right: -100%; width: 80%; max-width: 340px; height: 100vh;
    background: var(--bg-deep-2); display: block; padding: 90px 28px 40px;
    transition: right .35s ease; box-shadow: -10px 0 40px rgba(0,0,0,.4); overflow-y: auto; }
  .menu.open { right: 0; }
  .menu ul { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .menu > ul > li { width: 100%; }
  .menu > ul > li > a { color: rgba(255,255,255,.88); width: 100%; padding: 13px 8px; font-size: 16px; border-bottom: 1px solid rgba(255,255,255,.12); }
  .menu > ul > li > a::after { display: none; }
  .menu .submenu { position: static; transform: none; min-width: 0; padding: 0 0 4px 18px; background: transparent; box-shadow: none; opacity: 1; visibility: visible; pointer-events: auto; border-radius: 0; }
  .menu .submenu::before { display: none; }
  .menu .submenu a { color: rgba(255,255,255,.72); padding: 11px 8px; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .menu .submenu a:hover { background: rgba(255,255,255,.08); color: #fff; padding-left: 14px; }
  .lang-toggle { margin: 12px 0 0; }
  .banner-caption h1 { font-size: 30px; }
  .banner-arrow { display: none; }
  .intro-grid, .flagship, .honor-feature { grid-template-columns: 1fr; }
  .product-grid, .app-grid, .case-grid, .highlight-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; gap: 26px; margin: 20px 0 0; }
  .timeline::before { display: none; }
  .tl-item { min-height: 0; display: flex; flex-direction: column; align-items: flex-start; text-align: left; padding-left: 20px; position: relative; border-left: 2px solid var(--line); }
  .tl-item::before { content: ""; position: absolute; left: -6px; top: 4px; width: 10px; height: 10px; border-radius: 50%; background: var(--grad); }
  .tl-dot { display: none; }
  .tl-top, .tl-bottom, .tl-top.tl-near, .tl-top.tl-far, .tl-bottom.tl-near, .tl-bottom.tl-far { display: block; padding: 0; width: 100%; justify-content: flex-start; }
  .tl-top.tl-near, .tl-bottom.tl-near { order: 1; }
  .tl-top.tl-far, .tl-bottom.tl-far { order: 2; }
  .tl-item p { margin-top: 4px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 480px) {
  .banner-caption h1 { font-size: 26px; }
  .tech-cards, .stats-strip, .honor-list { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .intro-mission { grid-template-columns: 1fr; }
}

/* ===================== 知识产权 / 专利墙（炫酷深色版） ===================== */

.pat-wall { background: var(--light); position: relative; overflow: hidden; }
.pat-wall::before { content: ""; position: absolute; inset: 0; background: radial-gradient(700px 420px at 85% 0%, rgba(47,128,237,.06), transparent 60%), radial-gradient(620px 420px at 8% 100%, rgba(85,169,255,.08), transparent 60%); pointer-events: none; }
.pat-wall .container { position: relative; z-index: 1; }
.pat-wall .sec-head h2 { color: var(--ink); }
.pat-wall .sec-sub { color: var(--muted); }

.pat-note { max-width: 820px; margin: -12px auto 36px; text-align: center; font-size: 15px; line-height: 1.9; color: var(--muted); padding: 18px 28px; border: 1px solid var(--line); border-radius: 14px; background: var(--white); }
.pat-note b { color: var(--blue); }

.pat-filter { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin: 40px 0 32px; }
.pat-filter button { border: 1px solid var(--line); background: var(--white); color: var(--muted); font-size: 14.5px; font-weight: 600; padding: 9px 22px; border-radius: 30px; cursor: pointer; transition: all .3s; font-family: var(--font); }
.pat-filter button:hover { color: var(--blue); border-color: var(--blue); }
.pat-filter button.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 8px 24px rgba(47,128,237,.3); }
.pat-filter button em { font-style: normal; font-size: 12px; opacity: .65; margin-left: 4px; }
.pat-filter button.active em { opacity: 1; }

.pat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.pat-card { display: flex; flex-direction: column; background: var(--white); border: 1px solid var(--line); transition: transform .35s, box-shadow .35s, border-color .35s; }
.pat-card:hover { transform: translateY(-8px); border-color: var(--blue); box-shadow: 0 18px 44px rgba(9,44,110,.16), 0 0 0 1px rgba(85,169,255,.18); }
.pat-card .g-cap { display: none; }
.pat-media { position: relative; aspect-ratio: 3 / 4; overflow: hidden; background: #f2f6fc; }
.pat-media img { width: 100%; height: 100%; object-fit: cover; object-position: center top; transition: transform .6s; }
.pat-card:hover .pat-media img { transform: scale(1.07); }
.pat-media::after { content: "+"; position: absolute; top: 12px; right: 12px; width: 34px; height: 34px; border-radius: 50%; background: rgba(85,169,255,.92); color: #fff; font-size: 20px; line-height: 34px; text-align: center; opacity: 0; transition: opacity .3s, transform .3s; pointer-events: none; transform: scale(.8); }
.pat-card:hover .pat-media::after { opacity: 1; transform: scale(1); }
.pat-idx { position: absolute; left: 12px; bottom: 6px; font-size: 42px; font-weight: 800; color: rgba(47,128,237,.14); line-height: 1; letter-spacing: 1px; pointer-events: none; }
.pat-body { padding: 16px 20px 20px; display: flex; flex-direction: column; gap: 10px; border-top: 1px solid var(--line); flex: 1; }
.pat-type { align-self: flex-start; display: inline-flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 700; padding: 4px 13px; border-radius: 30px; letter-spacing: .4px; }
.pat-type::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 8px currentColor; }
.pat-um { color: #2f80ed; background: rgba(47,128,237,.10); border: 1px solid rgba(47,128,237,.30); }
.pat-sc { color: #0a9c6a; background: rgba(22,176,122,.10); border: 1px solid rgba(22,176,122,.30); }
.pat-body h3 { font-size: 14.5px; font-weight: 700; color: var(--ink); line-height: 1.5; }

@media (max-width: 1024px) {
  .pat-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 480px) {
  .pat-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===================== 核心技术子页面导航 ===================== */
.subnav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.subnav a { padding: 9px 22px; border-radius: 30px; font-size: 14px; font-weight: 600; color: var(--ink); background: rgba(255,255,255,.6); border: 1px solid var(--line); transition: all .3s; }
.subnav a:hover { color: var(--blue-2); background: rgba(47,128,237,.1); }
.subnav a.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(85,169,255,.28); }



/* ===================== 核心技术 · 图片卡片 ===================== */
.tech-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.tech-item {
  display: flex; flex-direction: column;
  background: var(--white); border: 1px solid var(--line); border-radius: 20px;
  overflow: hidden; transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.tech-item:hover {
  transform: translateY(-8px); border-color: var(--blue);
  box-shadow: 0 24px 55px rgba(9,44,110,.16), 0 0 0 1px rgba(47,128,237,.12);
}
.tech-figure {
  position: relative; background: #fff; height: 260px; padding: 20px;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.tech-figure img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; transition: transform .5s ease; }
.tech-item:hover .tech-figure img { transform: scale(1.06); }
.tech-idx {
  position: absolute; right: 16px; bottom: 2px; font-size: 46px; font-weight: 800;
  color: rgba(47,128,237,.10); line-height: 1; letter-spacing: 1px; pointer-events: none;
}
.tech-item-body { padding: 22px 24px 26px; }
.tech-item-body h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 10px; padding-left: 14px; position: relative; }
.tech-item-body h3::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 4px; height: 18px; border-radius: 2px; background: var(--grad); }
.tech-item-body p { font-size: 14.5px; color: var(--muted); line-height: 1.8; }

/* ===================== 机器学习加速研发 ===================== */
.section-ml { position: relative; overflow: hidden; background: var(--white); }
.section-ml .container { position: relative; z-index: 1; }
.section-ml .sec-head h2 { color: var(--ink); }
.section-ml .sec-sub { color: var(--muted); }
.section-ml .sec-kicker { color: var(--blue); }

.ml-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 46px; }
.ml-stats > div { text-align: center; background: var(--white); border: 1px solid var(--line); border-radius: 16px; padding: 26px 16px; }
.ml-stats b { display: block; font-size: 34px; font-weight: 800; line-height: 1.1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ml-stats span { display: block; margin-top: 8px; font-size: 13.5px; color: var(--muted); }

.ml-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 16px; margin-bottom: 46px; }
.ml-pillar { background: var(--white); border: 1px solid var(--line); border-radius: 16px; padding: 24px 22px; position: relative; transition: transform .3s ease, border-color .3s ease, background .3s ease; }
.ml-pillar:hover { transform: translateY(-4px); border-color: var(--blue); background: rgba(47,128,237,.05); }
.ml-pillar-num { display: inline; font-size: 18px; font-weight: 700; color: var(--blue); letter-spacing: 1px; margin-right: 6px; }
.ml-pillar h4 { display: inline; font-size: 19px; font-weight: 800; color: var(--ink); }
.ml-pillar p { font-size: 13.5px; color: var(--muted); line-height: 1.7; margin-top: 10px; }
.ml-arrow { align-self: center; font-size: 26px; color: var(--cyan); font-weight: 300; }

.ml-charts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 30px; }
.ml-chart { background: #fff; border-radius: 14px; padding: 18px 18px 14px; display: flex; flex-direction: column; transition: transform .35s ease, box-shadow .35s ease; }
.ml-chart:hover { transform: translateY(-6px); box-shadow: 0 20px 44px rgba(0,0,0,.35); }
.ml-chart img { width: 100%; height: auto; display: block; border-radius: 8px; margin-bottom: 12px; }
.ml-chart figcaption { font-size: 13px; font-weight: 700; color: #5a6b85; text-align: center; }

.ml-note { max-width: 860px; margin: 0 auto; text-align: center; font-size: 14px; line-height: 1.9; color: var(--muted); padding: 16px 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); }

/* ===================== 核心技术响应式 ===================== */
@media (max-width: 860px) {
  .tech-grid { grid-template-columns: 1fr; }
  .ml-stats { grid-template-columns: 1fr; }
  .ml-flow { grid-template-columns: 1fr; gap: 14px; }
  .ml-arrow { transform: rotate(90deg); justify-self: center; }
  .ml-charts { grid-template-columns: 1fr; }
  .tech-figure { height: 220px; }
}



/* ===================== 新闻动态 ===================== */
.news-tabs { display: flex; justify-content: center; gap: 12px; margin: -16px 0 40px; }
.news-tab {
  padding: 10px 32px; border-radius: 30px; font-size: 15px; font-weight: 700; letter-spacing: 1px;
  border: 1px solid var(--line); background: var(--white); color: var(--muted); cursor: pointer;
  transition: all .3s ease; font-family: var(--font);
}
.news-tab:hover { color: var(--blue); border-color: var(--blue); }
.news-tab.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 8px 24px rgba(47,128,237,.3); }

.news-panel { display: none; }
.news-panel.active { display: block; }

.news-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 28px; align-items: start; }

.news-feature {
  display: flex; flex-direction: column; border-radius: 16px; overflow: hidden;
  background: var(--white); border: 1px solid var(--line);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.news-feature:hover { transform: translateY(-6px); border-color: var(--blue); box-shadow: 0 22px 50px rgba(9,44,110,.16); }
.news-feature-img { aspect-ratio: 16 / 10; overflow: hidden; background: #eaf2fc; }
.news-feature-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.news-feature:hover .news-feature-img img { transform: scale(1.05); }
.news-feature-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; }
.news-cat { align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--blue); background: rgba(47,128,237,.1); padding: 4px 14px; border-radius: 20px; }
.news-feature-body h3 { font-size: 19px; font-weight: 800; color: var(--ink); line-height: 1.5; }
.news-date { font-size: 13px; color: #9aa7b8; white-space: nowrap; }

.news-list { list-style: none; display: flex; flex-direction: column; }
.news-list li { border-bottom: 1px solid var(--line); }
.news-list li:last-child { border-bottom: none; }

.news-row { display: flex; align-items: flex-start; gap: 16px; padding: 16px 4px; }
a.news-row { text-decoration: none; border-radius: 10px; transition: background .25s ease; }
a.news-row:hover { background: rgba(47,128,237,.04); }
.news-row .news-date { flex-shrink: 0; padding-top: 3px; }
.news-row-body { flex: 1; min-width: 0; }
.news-row-body h4 { font-size: 15.5px; font-weight: 700; color: var(--ink); line-height: 1.5; margin-bottom: 5px; transition: color .25s; }
a.news-row:hover .news-row-body h4 { color: var(--blue); }
.news-sum { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.news-feature-body .news-sum { font-size: 14px; }

.news-arrow { color: var(--blue); font-size: 18px; line-height: 1; flex-shrink: 0; align-self: center; opacity: 0; transform: translateX(-6px); transition: all .25s ease; }
a.news-row:hover .news-arrow { opacity: 1; transform: translateX(0); }

/* 行业新闻列表（带摘要 + 外链） */
.news-list-full .news-row { padding: 18px 6px; }
.news-list-full .news-row-body h4 { font-size: 16px; font-weight: 800; }

/* 公司新闻：缩略图 + 可点击卡片 */
.news-link { cursor: pointer; }
.news-row.news-link { border-radius: 12px; transition: background .25s ease; }
.news-row.news-link:hover { background: rgba(47,128,237,.04); }
.news-row.news-link:hover .news-row-body h4 { color: var(--blue); }
.news-row.news-link:hover .news-thumb img { transform: scale(1.06); }

.news-thumb { flex-shrink: 0; width: 116px; height: 82px; border-radius: 10px; overflow: hidden; background: #eaf2fc; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }

/* 新闻详情弹窗 */
.news-modal { position: fixed; inset: 0; z-index: 1200; display: none; }
.news-modal.active { display: block; }
.news-modal-mask { position: absolute; inset: 0; background: rgba(12, 46, 99, .72); backdrop-filter: blur(5px); }
.news-modal-box {
  position: relative; max-width: 760px; max-height: 88vh; overflow-y: auto;
  margin: 4vh auto; background: #fff; border-radius: 18px; box-shadow: 0 32px 90px rgba(0,0,0,.45);
  animation: newsPop .28s ease;
}
@keyframes newsPop { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
.news-modal-close {
  position: absolute; top: 14px; right: 14px; width: 38px; height: 38px; border-radius: 50%;
  background: rgba(0,0,0,.4); color: #fff; border: none; font-size: 24px; line-height: 1; cursor: pointer; z-index: 2;
  transition: background .2s ease;
}
.news-modal-close:hover { background: rgba(0,0,0,.65); }
.news-modal-img img { width: 100%; display: block; max-height: 46vh; object-fit: cover; }
.news-modal-body { padding: 22px 30px 30px; }
.news-modal-body h3 { font-size: 21px; font-weight: 800; color: var(--ink); line-height: 1.5; margin: 6px 0 14px; }
.news-modal-body p { font-size: 15px; color: #3c4c60; line-height: 1.95; }

@media (max-width: 860px) {
  .news-grid { grid-template-columns: 1fr; }
  .news-tabs { margin: -12px 0 30px; }
  .news-thumb { width: 84px; height: 62px; }
  .news-modal-box { max-width: 92%; }
  .news-modal-body { padding: 18px 20px 24px; }
  .news-modal-body h3 { font-size: 18px; }
}

/* ===================== 刘海屏安全区适配（配合 viewport-fit=cover） ===================== */
@supports (padding: max(0px)) {
  .nav { padding-top: env(safe-area-inset-top); }
  .nav-inner { padding-left: max(24px, env(safe-area-inset-left)); padding-right: max(24px, env(safe-area-inset-right)); }
  .footer { padding-bottom: env(safe-area-inset-bottom); }
}

/* ===================== 产品中心三大板块 ===================== */
.prod-tags { text-align: center; font-size: 15px; font-weight: 600; color: var(--blue); letter-spacing: 1px; }
.prod-tags-gold { color: #c8961e; }

/* 参数卡片 */
.param-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 56px; }
.param-card { background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 32px 26px; text-align: center; transition: transform .3s, box-shadow .3s; }
.param-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.param-ic { font-size: 40px; margin-bottom: 12px; }
.param-card h3 { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 12px; }
.param-val { font-size: 26px; font-weight: 800; color: var(--blue); margin-bottom: 14px; }
.param-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* 能量密度数据条 */
.param-bars { display: flex; flex-direction: column; gap: 7px; margin-bottom: 14px; }
.param-bars span { position: relative; height: 22px; border-radius: 6px; background: linear-gradient(90deg, var(--blue), var(--cyan)); }
.param-bars span i { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); font-style: normal; font-size: 11px; color: #fff; white-space: nowrap; }

/* 宽温域区间条 */
.param-range { position: relative; height: 16px; border-radius: 8px; background: linear-gradient(90deg, #4da3ff 0%, #2f80ed 45%, #f08a5d 100%); margin-bottom: 22px; }
.param-range em { position: absolute; top: 100%; font-style: normal; font-size: 12px; color: var(--muted); margin-top: 5px; }
.param-range .range-min { left: 0; }
.param-range .range-max { right: 0; }

/* 规格卡片 */
.spec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 56px; }
.spec-card { background: var(--white); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; transition: transform .3s, box-shadow .3s; }
.spec-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.spec-img { position: relative; height: 200px; background: #fff; display: flex; align-items: center; justify-content: center; padding: 18px; border-bottom: 1px solid var(--line); }
.spec-img img { max-width: 100%; max-height: 100%; object-fit: contain; transition: transform .5s ease; }
.spec-card:hover .spec-img img { transform: scale(1.05); }
.spec-badge { position: absolute; top: 12px; right: 12px; font-size: 11px; font-weight: 700; color: #fff; background: var(--grad); padding: 3px 10px; border-radius: 20px; }
.spec-img.plan { background: linear-gradient(135deg, #eef3fc 0%, #e0e9f5 100%); }
.plan-txt { font-size: 28px; font-weight: 800; color: #9aa7b8; letter-spacing: 1px; }
.spec-card h4 { font-size: 17px; font-weight: 800; color: var(--ink); padding: 16px 18px 4px; }
.spec-card p { font-size: 13.5px; color: var(--muted); padding: 0 18px 18px; }

/* 模组化范例 */
.modular { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: center; background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-deep-2) 100%); border-radius: 24px; padding: 44px; margin-bottom: 56px; color: #fff; }
.modular-left h3 { font-size: 22px; font-weight: 800; margin-bottom: 10px; }
.modular-left p { font-size: 14px; color: rgba(255,255,255,.7); margin-bottom: 20px; }
.modular-formula { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.modular-formula span { font-size: 16px; font-weight: 700; padding: 10px 16px; border: 1px solid rgba(255,255,255,.3); border-radius: 10px; }
.modular-formula b { font-size: 22px; color: var(--cyan); }
.modular-formula .modular-result { background: var(--grad); border-color: transparent; }
.modular-right { display: flex; align-items: center; gap: 10px; }
.mod-stage { flex: 1; text-align: center; padding: 20px 10px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 14px; font-weight: 700; }
.mod-stage i { display: block; font-style: normal; font-size: 13px; color: var(--cyan); margin-top: 6px; font-weight: 600; }
.mod-arrow { font-size: 20px; color: var(--cyan); flex-shrink: 0; }

/* 技术路线图 */
.roadmap { margin-bottom: 8px; }
.roadmap-title { font-size: 20px; font-weight: 800; color: var(--ink); text-align: center; margin-bottom: 30px; }
.roadmap-track { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.roadmap-track::before { content: ""; position: absolute; top: 21px; left: 12%; right: 12%; height: 2px; background: linear-gradient(90deg, var(--blue), var(--cyan)); }
.road-node { position: relative; text-align: center; padding-top: 58px; }
.road-node b { position: absolute; top: 4px; left: 50%; transform: translateX(-50%); width: 36px; height: 36px; line-height: 36px; border-radius: 50%; background: var(--grad); color: #fff; font-size: 13px; z-index: 1; }
.road-node span { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* 优势卡片 */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 52px; }
.adv-card { background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 32px 26px; text-align: center; transition: transform .3s, box-shadow .3s; }
.adv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.adv-card h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 10px; }
.adv-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* 产品矩阵 */
.matrix-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.matrix-card { background: var(--white); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; transition: transform .3s, box-shadow .3s; }
.matrix-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.matrix-img { height: 190px; background: #fff; display: flex; align-items: center; justify-content: center; padding: 18px; border-bottom: 1px solid var(--line); }
.matrix-img img { max-width: 100%; max-height: 100%; object-fit: contain; transition: transform .5s ease; }
.matrix-card:hover .matrix-img img { transform: scale(1.05); }
.matrix-card h4 { font-size: 17px; font-weight: 800; color: var(--ink); padding: 16px 18px 4px; }
.matrix-card p { font-size: 13.5px; color: var(--muted); padding: 0 18px 18px; }

/* 换氢流程图 */
.swap-flow { text-align: center; }
.swap-flow img { max-width: 100%; height: auto; margin: 0 auto; }
.swap-note { margin-top: 22px; font-size: 15px; font-weight: 700; color: var(--ink); text-align: center; }

/* 响应式 */
@media (max-width: 860px) {
  .param-grid, .spec-grid, .adv-grid, .matrix-grid { grid-template-columns: repeat(2, 1fr); }
  .modular { grid-template-columns: 1fr; }
  .modular-right { flex-direction: column; }
  .mod-arrow { transform: rotate(90deg); }
  .roadmap-track { grid-template-columns: 1fr; gap: 18px; }
  .roadmap-track::before { display: none; }
  .road-node { padding-top: 0; text-align: left; }
  .road-node b { position: static; transform: none; display: inline-block; margin-bottom: 6px; }
}
@media (max-width: 480px) {
  .param-grid, .spec-grid, .adv-grid, .matrix-grid { grid-template-columns: 1fr; }
}


/* ===================== 联系我们：总部 + 分支机构 ===================== */
.hq-head { text-align: center; margin-bottom: 36px; }
.hq-head h2 { font-size: 36px; font-weight: 800; color: var(--ink); }
.map-row { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: stretch; }
.map-box { border-radius: 18px; overflow: hidden; border: 1px solid var(--line); background: #f4f7fb; display: flex; align-items: center; justify-content: center; }
.map-box img { display: block; width: 100%; height: 100%; min-height: 380px; object-fit: contain; }
.hq-info { list-style: none; display: flex; flex-direction: column; justify-content: center; gap: 14px; background: var(--white); border: 1px solid var(--line); border-radius: 18px; padding: 30px 28px; max-width: 720px; margin: 0 auto; }
.hq-info li { display: flex; align-items: flex-start; gap: 14px; padding-bottom: 14px; border-bottom: 1px dashed var(--line); }
.hq-info li:last-child { border-bottom: none; padding-bottom: 0; }
.hq-info .hi-ic { font-size: 22px; line-height: 1.4; flex-shrink: 0; }
.hq-info p { font-size: 15.5px; color: var(--ink); line-height: 1.6; }
.hq-info-simple { max-width: 480px; margin: 0 auto; justify-content: center; }
.hq-info-simple li { border-bottom: none; padding-bottom: 0; }
.hq-info-simple li + li { margin-top: 4px; }
/* 总部：信息 + 发展布局图 两栏 */
.hq-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hq-row .hq-head { text-align: left; margin-bottom: 28px; }
.hq-row .hq-info { margin: 0; max-width: none; }
.hq-row .hq-map .layout-map { max-width: 420px; margin: 0 auto; }
.sec-head-sub h2 { font-size: 28px; }
.sec-head-sub { margin-bottom: 24px; }
.branch-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.branch-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 32px; transition: transform .3s ease, box-shadow .3s ease; }
.branch-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.branch-card .bc-ic { font-size: 40px; display: block; margin-bottom: 14px; }
.branch-card strong { display: block; font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.branch-card .bc-role { font-size: 13px; font-weight: 700; color: var(--blue); letter-spacing: 1px; margin-bottom: 18px; }
.bc-detail { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.bc-detail li { display: flex; align-items: flex-start; gap: 10px; font-size: 14.5px; color: var(--muted); line-height: 1.6; }
.bc-detail .bd-ic { flex-shrink: 0; }
@media (max-width: 860px) { .map-row { grid-template-columns: 1fr; } .branch-grid { grid-template-columns: repeat(2, 1fr); } .hq-row { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .branch-grid { grid-template-columns: 1fr; } }


/* ===== 产品中心：系列 + 产品卡片（参考 sinohytec 排布） ===== */
.series-head { text-align: center; margin-bottom: 40px; }
.series-head h2 { font-size: 34px; font-weight: 800; color: var(--ink); line-height: 1.2; margin: 6px 0 14px; }
.series-desc { max-width: 860px; margin: 0 auto; font-size: 15px; color: var(--muted); line-height: 1.85; }

.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card { display: block; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; text-decoration: none; color: inherit; transition: transform .3s ease, box-shadow .3s ease; }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.pc-img { position: relative; height: 260px; background: #fff; display: flex; align-items: center; justify-content: center; padding: 16px; border-bottom: 1px solid var(--line); overflow: hidden; }
.pc-img img { width: 100%; height: 100%; object-fit: contain; transition: transform .5s ease; }
.product-card:hover .pc-img img { transform: scale(1.06); }
.pc-plus { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 46px; height: 46px; border-radius: 50%; background: var(--grad); color: #fff; font-size: 28px; font-weight: 300; line-height: 46px; text-align: center; opacity: 0; transition: opacity .3s ease; }
.product-card:hover .pc-plus { opacity: 1; }
.pc-info { padding: 16px 18px 20px; text-align: center; }
.pc-info h4 { font-size: 17px; font-weight: 800; color: var(--ink); margin-bottom: 6px; }
.pc-info p { font-size: 13.5px; color: var(--muted); }

@media (max-width: 860px) { .prod-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .prod-grid { grid-template-columns: 1fr; } }

/* ===== 产品详情页 ===== */
.detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.detail-media { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; display: flex; align-items: center; justify-content: center; min-height: 380px; padding: 30px; }
.detail-media img { max-width: 100%; max-height: 460px; object-fit: contain; }
.detail-badge { position: absolute; top: 18px; left: 18px; background: var(--grad); color: #fff; font-size: 13px; font-weight: 700; padding: 6px 14px; border-radius: 999px; }
.detail-body h2 { font-size: 26px; font-weight: 800; color: var(--ink); margin-bottom: 14px; }
.detail-intro { font-size: 15px; color: var(--muted); line-height: 1.8; margin-bottom: 26px; }
.detail-specs-title { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 14px; }
.dspec-table { width: 100%; border-collapse: collapse; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.dspec-table th, .dspec-table td { padding: 13px 16px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
.dspec-table tr:last-child th, .dspec-table tr:last-child td { border-bottom: none; }
.dspec-table th { width: 38%; background: #f6f8fb; color: var(--muted); font-weight: 600; }
.dspec-table td { color: var(--ink); }
.btn-back { display: inline-flex; align-items: center; gap: 8px; margin-top: 28px; padding: 12px 24px; background: var(--grad); color: #fff; text-decoration: none; font-weight: 700; border-radius: 10px; box-shadow: 0 8px 24px rgba(47,128,237,.25); transition: opacity .3s ease; }
.btn-back:hover { opacity: .85; }
.btn-back-arrow { font-size: 16px; }
@media (max-width: 860px) { .detail-layout { grid-template-columns: 1fr; gap: 28px; } }


/* 亮点卡：宽幅图完整显示（不裁切） */
.highlight-contain img { object-fit: contain; }
.highlight-contain:hover img { transform: none; }


/* ===================== 电话悬浮按钮 + 在线留言模态框 ===================== */
.phone-fab {
  position: fixed; right: 26px; bottom: 26px; z-index: 150;
  width: 60px; height: 60px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--grad); color: #fff; font-size: 26px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px rgba(47,128,237,.45);
  transition: transform .3s ease, box-shadow .3s ease;
}
.phone-fab:hover { transform: translateY(-4px) scale(1.05); box-shadow: 0 16px 40px rgba(47,128,237,.6); }
.phone-fab::after { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid rgba(47,128,237,.5); animation: phone-pulse 2s ease-out infinite; }
@keyframes phone-pulse { 0% { transform: scale(1); opacity: 1; } 100% { transform: scale(1.7); opacity: 0; } }

.form-modal { position: fixed; inset: 0; z-index: 300; }
.form-modal[hidden] { display: none; }
.form-modal-mask { position: absolute; inset: 0; background: rgba(12,46,99,.5); }
.form-modal-card {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: min(800px, calc(100% - 28px));
  height: min(720px, 92vh);
  display: flex; flex-direction: column;
  background: var(--white); border: 1px solid var(--line); border-radius: 18px;
  overflow: hidden; box-shadow: 0 30px 80px rgba(9,44,110,.28);
}
.form-modal-card::before {
  content: ""; flex: 0 0 auto; height: 4px; background: var(--grad);
}
.form-modal-head {
  flex: 0 0 auto; display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 24px 30px 18px;
}
.form-modal-title h3 { font-size: 22px; font-weight: 800; color: var(--ink); letter-spacing: .5px; }
.form-modal-title p { font-size: 13px; color: var(--muted); margin-top: 5px; }
.form-modal-close {
  flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--light); color: var(--muted);
  font-size: 20px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .25s, color .25s;
}
.form-modal-close:hover { background: var(--line); color: var(--ink); }
.form-frame { flex: 1 1 auto; width: 100%; border: 0; background: #f7f9fc; min-height: 0; }




/* 荣誉照片子标题（并入荣誉资质后的小标题） */
.honor-gallery-title { text-align: center; font-size: 22px; font-weight: 800; color: var(--ink); margin: 44px 0 6px; }
.honor-gallery-sub { text-align: center; font-size: 14px; color: var(--muted); margin-bottom: 28px; }


/* ===== 备用电源柜 · 产品展示卡（反向布局） ===== */
.flagship-rev .flagship-art { order: 2; }
.flagship-rev .flagship-copy { order: 1; }
.flagship-rev .flagship-art img { max-height: 460px; width: auto; margin: 0 auto; }
#backup .flagship-art img { max-height: 460px; width: auto; margin: 0 auto; }
.pcab-intro { font-size: 15px; color: var(--muted); line-height: 1.85; margin-bottom: 18px; }
@media (max-width: 860px) {
  .flagship-rev .flagship-art, .flagship-rev .flagship-copy { order: initial; }
}


/* ===== 新闻动态分页 ===== */
.news-pagination { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 32px; flex-wrap: wrap; }
.news-pagination .pg-btn, .news-pagination .pg-num {
  min-width: 40px; height: 40px; padding: 0 14px;
  border: 1px solid var(--line); background: #fff; color: var(--muted);
  border-radius: 10px; font-size: 14px; font-weight: 600; font-family: var(--font);
  cursor: pointer; display: inline-flex; align-items: center; justify-content: center;
  transition: all .25s ease;
}
.news-pagination .pg-nums { display: flex; gap: 8px; }
.news-pagination .pg-num { min-width: 40px; padding: 0; }
.news-pagination .pg-btn:hover:not(:disabled), .news-pagination .pg-num:hover:not(.active) { border-color: var(--blue); color: var(--blue); }
.news-pagination .pg-num.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 6px 18px rgba(47,128,237,.3); }
.news-pagination .pg-btn:disabled { opacity: .4; cursor: not-allowed; }
.news-pagination .pg-next { color: var(--blue); }
.news-grid-single { grid-template-columns: 1fr; }