/* ============================================================
   Viscore 江苏为是科技 — 复刻版样式
   ============================================================ */
:root {
  --blue-deep: #082a56;
  --blue-dark: #0d3a75;
  --blue: #1456a0;
  --blue-bright: #1e78d7;
  --accent: #ffa200;
  --accent-deep: #f08d00;
  --text: #333;
  --text-mid: #666;
  --text-light: #999;
  --line: #e5e8ee;
  --bg-gray: #f5f7fa;
  --header-h: 64px;
  --radius: 6px;
  --shadow: 0 10px 30px rgba(13, 58, 117, .10);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: #fff;
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.wrap { width: min(1200px, 92%); margin: 0 auto; }
.en body { letter-spacing: .1px; }

/* ============================== Header ============================== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(6px);
  box-shadow: 0 1px 0 rgba(0,0,0,.04);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 4px 18px rgba(8, 42, 86, .12); }
.header-inner {
  max-width: 1280px; margin: 0 auto; height: 100%;
  padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 42px; height: 42px; flex: none; }
.brand-name { line-height: 1.15; }
.brand-name b { display: block; font-size: 19px; letter-spacing: 4px; color: #17355c; }
.brand-name span { display: block; font-size: 11px; letter-spacing: 5.5px; color: #8a97a8; font-weight: 600; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative;
  display: block; padding: 0 18px; height: var(--header-h);
  line-height: var(--header-h);
  font-size: 15px; color: #2c3a4d;
  transition: color .2s;
}
.main-nav a::after {
  content: ""; position: absolute; left: 18px; right: 18px; bottom: 0;
  height: 3px; background: var(--accent);
  transform: scaleX(0); transition: transform .25s;
}
.main-nav a:hover, .main-nav a.active { color: var(--accent); }
.main-nav a.active::after, .main-nav a:hover::after { transform: scaleX(1); }
.lang-switch {
  margin-left: 22px;
  font-size: 14px; font-weight: 700; color: var(--accent) !important;
  letter-spacing: 1px;
}
.lang-switch::after { display: none !important; }

.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; position: relative; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 8px; width: 24px; height: 2px;
  background: #17355c; transition: .3s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -7px; left: 0; }
.nav-toggle span::after { top: 7px; left: 0; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: rotate(45deg); top: 0; }
body.nav-open .nav-toggle span::after { transform: rotate(-45deg); top: 0; }

/* ============================== Hero slideshow ============================== */
.hero { position: relative; height: 100vh; min-height: 560px; overflow: hidden; background: var(--blue-deep); }
.hero-slide {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: scale(1.06);
  transition: opacity .9s ease, transform 6s linear, visibility .9s;
}
.hero-slide.active { opacity: 1; visibility: visible; transform: scale(1); z-index: 2; }

/* -- generated backgrounds -- */
.bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.bg svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.bg-1 { background: linear-gradient(160deg, #0a2f63 0%, #0d4a94 45%, #0a2c5c 100%); }
.bg-2 { background: linear-gradient(150deg, #071f42 0%, #0e4487 55%, #123a6e 100%); }
.bg-3 { background: linear-gradient(140deg, #0b2b58 0%, #16549e 50%, #0a2550 100%); }
.bg-4 { background: linear-gradient(155deg, #081f40 0%, #0d3f7e 60%, #0a2c5a 100%); }
.bg-5 { background: linear-gradient(145deg, #0a2850 0%, #114d93 50%, #092146 100%); }
.bg::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 42%, rgba(64, 156, 255, .22), transparent 70%);
}
.bg-mesh::before {
  content: ""; position: absolute; inset: 0;
  background: url("../img/mesh.svg") center/cover no-repeat;
}
.bg-circuit::before {
  content: ""; position: absolute; inset: 0;
  background: url("../img/circuit.svg") center/cover no-repeat;
}
.bg-mountain::before {
  content: ""; position: absolute; inset: 0;
  background: url("../img/mountain.svg") center/cover no-repeat;
}
.bin-col {
  position: absolute; top: -10%; height: 120%;
  writing-mode: vertical-rl; text-orientation: mixed;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 26px; letter-spacing: 10px;
  color: rgba(140, 190, 255, .14); user-select: none; z-index: 1; white-space: nowrap;
}

.hero-content { position: relative; z-index: 3; text-align: center; color: #fff; padding: 0 6%; max-width: 1080px; }
.hero-kicker { font-size: 14px; letter-spacing: 8px; color: #9cc4f5; margin-bottom: 18px; }
.hero-title { font-size: clamp(40px, 6.5vw, 76px); font-weight: 800; letter-spacing: 6px; line-height: 1.25; text-shadow: 0 6px 30px rgba(0, 20, 60, .45); }
.hero-title em { font-style: normal; color: var(--accent); }
.hero-sub { margin-top: 22px; font-size: clamp(15px, 1.6vw, 20px); color: #cfe2ff; letter-spacing: 2px; }
.hero-desc { margin-top: 20px; font-size: 15px; color: rgba(215, 231, 255, .85); max-width: 760px; margin-left: auto; margin-right: auto; }

.btn {
  display: inline-block; margin-top: 34px;
  padding: 13px 44px; border-radius: 999px;
  background: var(--accent); color: #fff;
  font-size: 15px; letter-spacing: 2px; border: 0;
  box-shadow: 0 8px 24px rgba(255, 162, 0, .35);
  transition: .25s;
}
.btn:hover { background: var(--accent-deep); transform: translateY(-2px); }
.btn-ghost { background: transparent; border: 1px solid rgba(255,255,255,.55); box-shadow: none; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }

/* slide 2: core tech */
.hero-cols { display: flex; align-items: center; gap: 70px; text-align: left; }
.hero-cols .hero-title { font-size: clamp(32px, 4.2vw, 52px); }
.lat-tabs { display: flex; gap: 46px; margin-top: 34px; }
.lat-tab b { display: block; font-size: 13px; color: var(--accent); letter-spacing: 2px; margin-bottom: 6px; font-family: Georgia, serif; font-style: italic; }
.lat-tab span { font-size: clamp(20px, 2.4vw, 30px); font-weight: 700; letter-spacing: 3px; }
.tech-card {
  flex: 1; max-width: 430px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  backdrop-filter: blur(4px);
  border-radius: var(--radius);
  padding: 34px 36px;
}
.tech-card h3 { font-size: 19px; letter-spacing: 2px; color: #ffd28a; margin-bottom: 14px; }
.tech-card p { font-size: 14px; color: #d5e5ff; line-height: 2; }
.tech-card .more { display: inline-block; margin-top: 18px; color: var(--accent); font-size: 13px; letter-spacing: 3px; font-weight: 700; }
.tech-card .more:hover { text-decoration: underline; }

/* slide 4: news */
.home-news { width: min(880px, 100%); text-align: left; }
.home-news .news-item {
  display: flex; gap: 22px; align-items: flex-start;
  padding: 18px 20px; border-radius: var(--radius);
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  margin-top: 14px; transition: .25s;
}
.home-news .news-item:hover { background: rgba(255,255,255,.12); transform: translateX(6px); }
.home-news .news-tag { flex: none; font-size: 12px; color: var(--accent); border: 1px solid var(--accent); border-radius: 3px; padding: 2px 8px; margin-top: 4px; }
.home-news h4 { font-size: 16px; color: #fff; letter-spacing: .5px; }
.home-news p { font-size: 13px; color: #b9d2f5; margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.home-news .view-all { display: inline-block; margin-top: 20px; color: var(--accent); font-size: 14px; letter-spacing: 2px; }
.home-news .view-all:hover { text-decoration: underline; }

/* slide 5: about */
.hero-about { text-align: left; display: flex; gap: 70px; align-items: center; }
.hero-about .hero-title { font-size: clamp(32px, 4.2vw, 52px); }
.hero-about p { max-width: 560px; font-size: 14px; color: #cfe0fb; line-height: 2.1; margin-top: 22px; }

/* hero controls */
.hero-counter {
  position: absolute; left: 42px; bottom: 40px; z-index: 5;
  font-family: Georgia, serif; font-size: 15px; letter-spacing: 3px; color: rgba(255,255,255,.85);
}
.hero-counter b { color: var(--accent); font-size: 26px; font-style: italic; }
.hero-arrows { position: absolute; right: 42px; bottom: 34px; z-index: 5; display: flex; gap: 12px; }
.hero-arrows button {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.4); background: rgba(255,255,255,.08);
  color: #fff; font-size: 17px; transition: .25s;
}
.hero-arrows button:hover { background: var(--accent); border-color: var(--accent); }
.hero-dots { position: absolute; bottom: 46px; left: 50%; transform: translateX(-50%); z-index: 5; display: flex; gap: 10px; }
.hero-dots i { width: 26px; height: 3px; background: rgba(255,255,255,.3); cursor: pointer; transition: .3s; }
.hero-dots i.on { background: var(--accent); }
.scroll-hint {
  position: absolute; bottom: 100px; left: 50%; transform: translateX(-50%); z-index: 4;
  width: 26px; height: 42px; border: 2px solid rgba(255,255,255,.5); border-radius: 14px;
}
.scroll-hint::after {
  content: ""; position: absolute; left: 50%; top: 7px; width: 4px; height: 8px;
  margin-left: -2px; border-radius: 2px; background: #fff;
  animation: wheel 1.6s ease-in-out infinite;
}
@keyframes wheel { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }

/* ============================== Inner page banner ============================== */
.page-banner { position: relative; height: 380px; margin-top: var(--header-h); overflow: hidden; display: flex; align-items: center; justify-content: center; text-align: center; color: #fff; }
.page-banner .bg svg { width: 100%; height: 100%; }
.page-banner h1 { position: relative; z-index: 2; font-size: clamp(30px, 4vw, 44px); letter-spacing: 8px; text-shadow: 0 4px 20px rgba(0,20,60,.5); }
.page-banner .en { position: relative; z-index: 2; margin-top: 10px; font-size: 16px; letter-spacing: 3px; color: #cfe2ff; }

.breadcrumb { background: var(--bg-gray); border-bottom: 1px solid var(--line); font-size: 13px; color: var(--text-mid); }
.breadcrumb .wrap { display: flex; align-items: center; gap: 6px; height: 46px; }
.breadcrumb svg { width: 15px; height: 15px; fill: #7d8ea3; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: #b7c2cf; margin: 0 4px; }

/* ============================== Sections ============================== */
.section { padding: 80px 0; }
.section.alt { background: var(--bg-gray); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head h2 { font-size: clamp(24px, 3vw, 34px); letter-spacing: 3px; color: #1c2b3d; }
.sec-head h2 i { font-style: normal; color: var(--accent); }
.sec-head .bar { width: 46px; height: 4px; background: var(--accent); margin: 18px auto 0; border-radius: 2px; }
.sec-head p.sub { margin-top: 14px; color: var(--text-light); font-size: 14px; letter-spacing: 1px; }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 核心技术 page ---------- */
.duo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; }
.chart-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.chart-card h4 { text-align: center; font-size: 15px; color: var(--blue); margin-bottom: 18px; letter-spacing: 1px; }
.duo-grid figure figcaption { margin-top: 20px; }
.duo-grid figure figcaption b { display: block; font-size: 16px; color: #1c2b3d; margin-bottom: 8px; }
.duo-grid figure figcaption p { font-size: 14px; color: var(--text-mid); }

.stack-demo { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.layer-stack { display: flex; flex-direction: column; gap: 10px; }
.layer { padding: 18px 24px; border-radius: var(--radius); color: #fff; text-align: center; font-size: 15px; letter-spacing: 2px; box-shadow: var(--shadow); }
.layer small { display: block; font-size: 12px; opacity: .75; letter-spacing: 1px; font-weight: 400; }
.layer-1 { background: linear-gradient(90deg, #2f80d6, #56a4ef); }
.layer-2 { background: linear-gradient(90deg, #1e64b4, #2f80d6); }
.layer-3 { background: linear-gradient(90deg, #14509a, #1e64b4); }
.layer-4 { background: linear-gradient(90deg, #0d3a75, #14509a); }
.layer.hl { outline: 3px solid var(--accent); outline-offset: 3px; position: relative; }
.layer.hl::after {
  content: "← 网卡 NIC"; position: absolute; right: -10px; top: 50%;
  transform: translate(100%, -50%); color: var(--accent); font-weight: 700; letter-spacing: 1px; white-space: nowrap;
}
.stack-note { font-size: 15px; color: var(--text-mid); }
.stack-note b { display: block; font-size: 20px; color: #1c2b3d; margin-bottom: 14px; letter-spacing: 1px; }

.evo-flow { display: flex; align-items: stretch; justify-content: center; gap: 0; margin-top: 40px; flex-wrap: wrap; }
.evo-node { position: relative; flex: 1; min-width: 220px; max-width: 300px; padding: 30px 22px; text-align: center; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.evo-node + .evo-node { margin-left: 54px; }
.evo-node + .evo-node::before {
  content: ""; position: absolute; left: -40px; top: 50%; width: 26px; height: 26px;
  border-top: 3px solid var(--accent); border-right: 3px solid var(--accent);
  transform: translateY(-50%) rotate(45deg);
}
.evo-node h4 { font-size: 18px; letter-spacing: 2px; color: #1c2b3d; }
.evo-node p { font-size: 13px; color: var(--text-mid); margin-top: 10px; }
.evo-node.hot { background: linear-gradient(135deg, #1456a0, #1e78d7); border: 0; }
.evo-node.hot h4 { color: #fff; }
.evo-node.hot p { color: #cfe2ff; }
.evo-node.hot::after { content: "LT-RDMA"; position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; font-size: 11px; letter-spacing: 2px; padding: 3px 12px; border-radius: 999px; }

.timeline { position: relative; margin-top: 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.timeline::before { content: ""; position: absolute; left: 4%; right: 4%; top: 9px; height: 2px; background: linear-gradient(90deg, var(--blue), var(--accent)); }
.tl-item { position: relative; padding-top: 38px; text-align: center; }
.tl-item::before { content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 5px solid var(--accent); box-shadow: 0 0 0 4px rgba(255,162,0,.15); }
.tl-item .year { font-family: Georgia, serif; font-size: 30px; font-weight: 700; color: var(--blue); font-style: italic; }
.tl-item p { margin-top: 10px; font-size: 14px; color: var(--text-mid); }

.scene-flow { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.scene {
  width: 150px; padding: 26px 12px; border-radius: var(--radius); text-align: center;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); transition: .3s;
}
.scene:hover { transform: translateY(-8px); border-color: var(--blue-bright); }
.scene svg { width: 44px; height: 44px; margin: 0 auto 12px; }
.scene b { font-size: 14px; color: #1c2b3d; letter-spacing: 1px; }
.scene-arrow { color: var(--accent); font-size: 22px; font-weight: 700; }

/* ---------- 加入我们 page ---------- */
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; margin-top: 44px; }
.value-card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 26px; box-shadow: var(--shadow); transition: .3s; overflow: hidden; }
.value-card:hover { transform: translateY(-8px); border-color: var(--blue-bright); }
.value-card .num { font-family: Georgia, serif; font-style: italic; font-size: 44px; font-weight: 700; color: rgba(20, 86, 160, .12); position: absolute; right: 18px; top: 10px; }
.value-card h3 { font-size: 18px; letter-spacing: 2px; color: #1c2b3d; margin-bottom: 12px; }
.value-card h3::before { content: ""; display: block; width: 30px; height: 3px; background: var(--accent); margin-bottom: 14px; }
.value-card p { font-size: 13px; color: var(--text-mid); line-height: 1.95; }
.value-intro { max-width: 860px; margin: 0 auto; text-align: center; font-size: 15px; color: var(--text-mid); }

.welfare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.welfare-col { background: #fff; border-radius: var(--radius); padding: 40px 44px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.welfare-col.tint { background: linear-gradient(160deg, #0d3a75, #1e78d7); border: 0; color: #fff; }
.welfare-col h3 { font-size: 20px; letter-spacing: 2px; margin-bottom: 8px; color: #1c2b3d; }
.welfare-col.tint h3 { color: #fff; }
.welfare-col .lead { font-size: 13px; color: var(--text-light); margin-bottom: 24px; }
.welfare-col.tint .lead { color: rgba(255,255,255,.7); }
.chip-list { display: flex; flex-wrap: wrap; gap: 12px; }
.chip { padding: 10px 20px; border-radius: 999px; background: var(--bg-gray); border: 1px solid var(--line); font-size: 14px; color: #2c3a4d; transition: .25s; }
.chip:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.welfare-col.tint .chip { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.25); color: #fff; }
.welfare-col.tint .chip:hover { border-color: var(--accent); background: rgba(255,162,0,.2); }

.photo-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.photo {
  position: relative; aspect-ratio: 4/3; border-radius: var(--radius); overflow: hidden;
  display: flex; align-items: flex-end; justify-content: center;
}
.photo span {
  position: relative; z-index: 2; width: 100%; text-align: center; padding: 8px 4px;
  font-size: 12px; color: #fff; letter-spacing: 1px;
  background: linear-gradient(transparent, rgba(5, 20, 45, .72));
}
.photo::before { content: ""; position: absolute; inset: 0; background: var(--ph, linear-gradient(135deg, #9db8d8, #5e83b4)); transition: .4s; }
.photo:hover::before { transform: scale(1.08); }
.photo::after {
  content: ""; position: absolute; top: 12px; right: 12px; width: 26px; height: 26px; z-index: 2; opacity: .8;
  background: no-repeat center/contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='rgba(255,255,255,.85)'%3E%3Cpath d='M9 3l-1.5 2H4a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-3.5L15 3H9zm3 5a5.5 5.5 0 1 1 0 11 5.5 5.5 0 0 1 0-11zm0 2a3.5 3.5 0 1 0 0 7 3.5 3.5 0 0 0 0-7z'/%3E%3C/svg%3E");
}

.testimonial-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.t-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 38px 40px; box-shadow: var(--shadow); }
.t-card .who { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.avatar { width: 58px; height: 58px; border-radius: 50%; flex: none; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 20px; font-weight: 700; background: linear-gradient(135deg, var(--blue), var(--blue-bright)); }
.avatar.alt { background: linear-gradient(135deg, #f08d00, #ffb84d); }
.who b { font-size: 18px; letter-spacing: 1px; color: #1c2b3d; }
.who span { display: block; font-size: 13px; color: var(--text-light); }
.t-card p { font-size: 14px; color: var(--text-mid); line-height: 2.05; }

.faq { max-width: 880px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; box-shadow: var(--shadow); }
.faq-q {
  width: 100%; background: none; border: 0; text-align: left;
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 20px 28px; font-size: 16px; font-weight: 600; color: #1c2b3d; letter-spacing: 1px;
}
.faq-q .sign { flex: none; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--accent); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 16px; transition: .3s; }
.faq-item.open .faq-q .sign { background: var(--accent); color: #fff; transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .45s ease; }
.faq-a p { padding: 0 28px 24px; font-size: 14px; color: var(--text-mid); }

.cta-band { background: linear-gradient(120deg, #0d3a75, #1e78d7); color: #fff; text-align: center; padding: 70px 0; }
.cta-band h2 { font-size: clamp(22px, 3vw, 32px); letter-spacing: 4px; }
.cta-band p { margin-top: 14px; color: #cfe2ff; letter-spacing: 2px; }

/* ---------- 订购信息 page ---------- */
.product-card { display: grid; grid-template-columns: 380px 1fr; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); margin-bottom: 30px; }
.product-media { background: linear-gradient(150deg, #0d3a75, #1e78d7); display: flex; align-items: center; justify-content: center; padding: 34px; }
.product-body { padding: 34px 40px; }
.product-body .date { font-size: 13px; color: var(--text-light); }
.product-body h3 { font-size: 24px; letter-spacing: 1px; color: #1c2b3d; margin: 8px 0 16px; }
.product-body h3 sup { color: var(--accent); font-size: 13px; }
.product-body p { font-size: 14px; color: var(--text-mid); line-height: 2; }
.spec-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.spec-list .chip { font-size: 13px; padding: 7px 16px; }

/* ---------- 关于我们 page ---------- */
.brand-story { position: relative; padding: 90px 0; overflow: hidden; }
.brand-story .ghost {
  position: absolute; top: 26px; left: 50%; transform: translateX(-50%);
  font-family: Georgia, serif; font-weight: 800; font-style: italic;
  font-size: clamp(70px, 12vw, 150px); letter-spacing: 4px; color: rgba(20, 86, 160, .07);
  white-space: nowrap; user-select: none; line-height: 1;
}
.brand-story .wrap { position: relative; }
.brand-story h2 { font-size: clamp(24px, 3vw, 32px); letter-spacing: 4px; color: #1c2b3d; margin-bottom: 26px; }
.brand-story p { margin-bottom: 14px; font-size: 15px; color: var(--text-mid); text-indent: 2em; line-height: 2.1; }

.intro-grid { display: grid; grid-template-columns: 460px 1fr; gap: 50px; align-items: stretch; }
.intro-photo { border-radius: var(--radius); overflow: hidden; min-height: 380px; position: relative; }
.intro-photo .ph { position: absolute; inset: 0; background: linear-gradient(160deg, #b9cfe8 0%, #7fa4cf 45%, #3f6ba3 100%); }
.intro-photo .ph::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(255,255,255,.14) 1px, transparent 1px) 0 0/ 60px 100%,
    linear-gradient(rgba(8,42,86,.18) 1px, transparent 1px) 0 0/ 100% 46px,
    linear-gradient(rgba(8,42,86,.28) 2px, transparent 2px) 0 38%/ 100% 50%;
}
.intro-list { display: flex; flex-direction: column; justify-content: space-between; gap: 8px; }
.intro-item { display: flex; gap: 18px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.intro-item:last-child { border-bottom: 0; }
.intro-item .ico { flex: none; width: 46px; height: 46px; border-radius: 50%; background: linear-gradient(135deg, var(--blue), var(--blue-bright)); display: flex; align-items: center; justify-content: center; }
.intro-item .ico svg { width: 22px; height: 22px; fill: #fff; }
.intro-item h4 { font-size: 16px; letter-spacing: 1px; color: var(--blue); margin-bottom: 4px; }
.intro-item p { font-size: 13.5px; color: var(--text-mid); line-height: 1.9; }

.team-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.team-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.team-top { display: flex; align-items: center; gap: 20px; padding: 30px 34px 22px; }
.team-top .avatar { width: 72px; height: 72px; font-size: 24px; border-radius: 12px; }
.team-top h3 { font-size: 20px; letter-spacing: 2px; color: #1c2b3d; }
.team-top h3 span { display: block; font-size: 13px; color: var(--accent); letter-spacing: 1px; margin-top: 4px; font-weight: 600; }
.team-body { padding: 0 34px 30px; font-size: 14px; color: var(--text-mid); line-height: 2; }
.team-more { max-height: 0; overflow: hidden; transition: max-height .5s ease; }
.team-more .block { margin-top: 16px; }
.team-more b { display: block; color: var(--blue); margin-bottom: 6px; letter-spacing: 1px; }
.team-more li { position: relative; padding-left: 16px; font-size: 13.5px; margin: 4px 0; color: var(--text-mid); }
.team-more li::before { content: ""; position: absolute; left: 0; top: .8em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.team-toggle { margin: 4px 34px 28px; background: none; border: 0; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: 3px; }
.team-toggle:hover { text-decoration: underline; }

.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.culture-card { border-radius: var(--radius); padding: 44px 34px; color: #fff; text-align: center; background: linear-gradient(150deg, #0d3a75, #1e78d7); box-shadow: var(--shadow); transition: .3s; }
.culture-card:nth-child(2) { background: linear-gradient(150deg, #14509a, #2f80d6); }
.culture-card:nth-child(3) { background: linear-gradient(150deg, #082a56, #14509a); }
.culture-card:hover { transform: translateY(-8px); }
.culture-card small { display: block; font-size: 12px; letter-spacing: 3px; color: #9cc4f5; text-transform: uppercase; }
.culture-card h3 { margin: 10px 0 14px; font-size: 21px; letter-spacing: 2px; }
.culture-card p { font-size: 13.5px; color: #cfe2ff; line-height: 1.9; }
.value-chips { display: flex; justify-content: center; gap: 22px; margin-top: 44px; flex-wrap: wrap; }
.value-chips b {
  width: 92px; height: 92px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 19px; letter-spacing: 3px; color: var(--blue); background: #fff;
  border: 2px solid var(--blue-bright); box-shadow: var(--shadow); transition: .3s; cursor: default;
}
.value-chips b:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-6px); }

/* ---------- 新闻 ---------- */
.news-list { max-width: 960px; margin: 0 auto; }
.news-row { display: flex; gap: 34px; padding: 34px 10px; border-bottom: 1px solid var(--line); transition: .25s; border-radius: var(--radius); }
.news-row:hover { background: var(--bg-gray); transform: translateX(6px); }
.news-date { flex: none; text-align: center; padding-top: 4px; min-width: 86px; }
.news-date b { display: block; font-family: Georgia, serif; font-size: 34px; color: var(--blue); font-style: italic; line-height: 1.1; }
.news-date span { font-size: 13px; color: var(--text-light); letter-spacing: 1px; }
.news-info h3 { font-size: 18px; color: #1c2b3d; letter-spacing: .5px; line-height: 1.6; transition: .2s; }
.news-row:hover h3 { color: var(--blue-bright); }
.news-info p { margin-top: 10px; font-size: 13.5px; color: var(--text-mid); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-info .plus { display: inline-block; margin-top: 10px; font-size: 20px; color: var(--accent); line-height: 1; }
.news-info .plus:hover { transform: translateX(4px); }

.article { max-width: 860px; margin: 0 auto; }
.article .a-date { font-size: 13px; color: var(--text-light); }
.article h1 { font-size: clamp(22px, 3vw, 30px); color: #1c2b3d; line-height: 1.6; margin: 12px 0 30px; }
.article .a-body p { font-size: 15px; color: var(--text-mid); line-height: 2.15; margin-bottom: 18px; text-indent: 2em; }
.article .a-body h3 { font-size: 17px; color: var(--blue); margin: 28px 0 12px; }
.article .a-body li { position: relative; padding-left: 18px; font-size: 14.5px; color: var(--text-mid); margin: 8px 0; line-height: 1.95; }
.article .a-body li::before { content: ""; position: absolute; left: 0; top: .8em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.article .back { display: inline-block; margin-top: 30px; color: var(--accent); font-size: 14px; letter-spacing: 1px; }
.article .back:hover { text-decoration: underline; }
.a-figure { margin: 26px 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: linear-gradient(150deg, #0d3a75, #1e78d7); padding: 30px; }
.a-figure figcaption { text-align: center; font-size: 13px; color: #9cc4f5; margin-top: 14px; }

/* ============================== Footer ============================== */
.site-footer { background: #0a2547; color: #9fb4d4; margin-top: 0; }
.footer-nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 44px; padding: 34px 0 24px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-nav a { font-size: 14px; letter-spacing: 2px; color: #cddcf2; transition: .2s; }
.footer-nav a:hover, .footer-nav a.active { color: var(--accent); }
.footer-contact { text-align: center; padding: 26px 0 6px; font-size: 14px; letter-spacing: 1px; }
.footer-contact a { color: #fff; }
.footer-contact a:hover { color: var(--accent); }
.footer-contact .fc { margin: 0 12px; color: #7e93b6; }
.footer-addr { text-align: center; font-size: 13px; line-height: 2; color: #7e93b6; padding: 10px 0 26px; }
.footer-bottom { background: #071b36; padding: 16px 0; text-align: center; font-size: 12.5px; color: #61789e; letter-spacing: .5px; }
.footer-bottom a { color: #8fa6c9; }
.footer-bottom a:hover { color: var(--accent); }

/* ============================== Responsive ============================== */
@media (max-width: 1024px) {
  .photo-grid { grid-template-columns: repeat(4, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-grid { grid-template-columns: 1fr; }
  .intro-photo { min-height: 260px; }
}
@media (max-width: 860px) {
  .main-nav {
    position: fixed; top: var(--header-h); right: 0; width: min(78vw, 320px);
    height: calc(100vh - var(--header-h)); background: #fff; flex-direction: column;
    align-items: stretch; padding: 18px 0; gap: 0;
    box-shadow: -12px 0 40px rgba(8, 42, 86, .18);
    transform: translateX(100%); transition: transform .35s;
  }
  body.nav-open .main-nav { transform: none; }
  .main-nav a { height: 52px; line-height: 52px; padding: 0 30px; border-bottom: 1px solid #f0f2f6; }
  .main-nav a::after { display: none; }
  .main-nav a.active { background: var(--bg-gray); }
  .lang-switch { margin: 18px 30px 0; display: block; height: auto !important; line-height: 1.6 !important; border: 0 !important; }
  .nav-toggle { display: block; }
  .hero-cols, .hero-about { flex-direction: column; gap: 30px; text-align: center; }
  .tech-card { max-width: 100%; }
  .lat-tabs { justify-content: center; }
  .duo-grid, .stack-demo, .welfare-grid, .testimonial-grid, .team-grid, .culture-grid { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: 1fr; }
  .evo-node + .evo-node { margin-left: 0; margin-top: 54px; }
  .evo-node + .evo-node::before { left: 50%; top: -40px; transform: translateX(-50%) rotate(135deg); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { display: none; }
  .hero-counter { left: 20px; bottom: 26px; }
  .hero-arrows { right: 20px; bottom: 20px; }
  .hero-dots { display: none; }
  .scroll-hint { display: none; }
  .bin-col { display: none; }
  .section { padding: 56px 0; }
  .photo-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 560px) {
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .news-row { flex-direction: column; gap: 10px; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-name b { font-size: 16px; letter-spacing: 2px; }
  .brand-name span { font-size: 9px; letter-spacing: 3.5px; }
}