/* ===== 谷群智能装备官网 · 深色科技风 ===== */
:root {
  --bg: #070b16;
  --bg-2: #0b1222;
  --panel: rgba(18, 27, 48, 0.72);
  --panel-solid: #0e1626;
  --border: rgba(86, 130, 194, 0.22);
  --text: #e6edf7;
  --muted: #93a4c2;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --accent-grad: linear-gradient(120deg, #22d3ee 0%, #3b82f6 60%, #6366f1 100%);
  --glow: 0 0 24px rgba(34, 211, 238, 0.35);
  --radius: 16px;
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px 600px at 12% -8%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(34, 211, 238, 0.14), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  line-height: 1.7;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 网格背景 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 220, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 220, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 85%);
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 22, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 19px; letter-spacing: .5px; text-decoration: none; color: var(--text); }
.logo .logo-img {
  height: 44px; width: auto; display: block;
  filter: drop-shadow(0 0 12px rgba(255,140,80,.18));
}
.footer .logo .logo-img { height: 36px; }
.logo small { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: 1.5px; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  padding: 9px 15px; border-radius: 10px; font-size: 15px; color: var(--muted);
  transition: .2s; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: rgba(34, 211, 238, 0.1); }
.nav-ai {
  display: inline-flex; align-items: center; gap: 7px;
  margin-left: 14px; padding: 7px 14px 7px 12px;
  background: linear-gradient(135deg, #0ea5b7 0%, #22d3ee 60%, #06b6d4 100%);
  color: #fff; font-weight: 700; font-size: 14px; letter-spacing: .3px;
  border-radius: 999px; text-decoration: none; white-space: nowrap;
  box-shadow: 0 6px 18px rgba(34, 211, 238, .28), inset 0 1px 0 rgba(255, 255, 255, .18);
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
  position: relative; overflow: hidden;
}
.nav-ai::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, .28) 50%, transparent 100%);
  transform: translateX(-120%);
  transition: transform .6s ease;
}
.nav-ai:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(34, 211, 238, .42); filter: brightness(1.06); }
.nav-ai:hover::before { transform: translateX(120%); }
.nav-ai:active { transform: translateY(0); filter: brightness(.96); }
.nav-ai .ai-hex { width: 18px; height: 18px; flex-shrink: 0; color: #fff; }
.nav-ai .ai-hex text { fill: #fff; }
.nav-ai .ai-hex path { stroke: #fff; }
.nav-ai span { line-height: 1; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 9px; padding: 8px 12px; font-size: 18px; cursor: pointer; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 11px; font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1px solid transparent; transition: .22s; white-space: nowrap;
}
.btn-primary { background: var(--accent-grad); color: #04121f; box-shadow: var(--glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 32px rgba(34, 211, 238, 0.55); }
.btn-ghost { border-color: var(--border); color: var(--text); background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ===== Hero ===== */
.hero { position: relative; padding: 96px 0 70px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; position: relative; z-index: 2; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; letter-spacing: 2px;
  color: var(--cyan); border: 1px solid var(--border); padding: 6px 14px; border-radius: 999px;
  background: rgba(34, 211, 238, 0.06); margin-bottom: 22px; text-transform: uppercase;
}
.hero h1 { font-size: clamp(32px, 5vw, 56px); line-height: 1.12; font-weight: 800; letter-spacing: .5px; }
.hero h1 .grad { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--muted); font-size: 17px; margin: 22px 0 30px; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 26px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: 30px; font-weight: 800; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats .stat .lbl { font-size: 13px; color: var(--muted); }

.hero-visual { position: relative; }
.hero-visual .carousel {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
  aspect-ratio: 4/3;
  background: transparent;
}
.hero-visual .slides,
.hero-visual .slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-visual .slide {
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  z-index: 1;
  transform: scale(1.08);
  animation: kenBurns 7s ease-in-out forwards;
}
.hero-visual .slide.is-active {
  opacity: .7;
  z-index: 2;
}
@keyframes kenBurns {
  0%   { transform: scale(1.0); }
  100% { transform: scale(1.12); }
}
.hero-visual .slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,11,22,0) 55%, rgba(7,11,22,.78) 100%);
}
/* 视频/轮播图的蓝灰薄雾：盖在视频之上（z-index 高于 .hero-loop 的 1），
   比首页底层 .hero-mist（约 .16）更浅；降蓝、掺入浅灰，雾感更沉不刺眼 */
.hero-visual .slide::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 18%, rgba(125,211,252,.07), rgba(125,211,252,0) 62%),
    linear-gradient(180deg, rgba(170,182,198,.16), rgba(140,154,170,.12));
  mix-blend-mode: screen;
}
.hero-visual .cap {
  position: absolute;
  left: 22px;
  bottom: 22px;
  z-index: 3;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(7,11,22,.55);
  border: 1px solid rgba(34,211,238,.45);
  color: #d3ecff;
  font-size: 13px;
  letter-spacing: 1px;
  backdrop-filter: blur(8px);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .8s .25s ease, transform .8s .25s ease;
}
.hero-visual .slide.is-active .cap {
  opacity: 1;
  transform: translateY(0);
}

.hero-visual .arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(7,11,22,.55);
  color: #fff;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  transition: background .2s, transform .2s, border-color .2s;
  opacity: 0;
}
.hero-visual .carousel:hover .arrow,
.hero-visual .carousel:focus-within .arrow { opacity: 1; }
.hero-visual .arrow:hover {
  background: rgba(34,211,238,.25);
  border-color: rgba(34,211,238,.7);
  transform: translateY(-50%) scale(1.08);
}
.hero-visual .prev { left: 14px; }
.hero-visual .next { right: 14px; }

.hero-visual .dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  gap: 8px;
}
.hero-visual .dots button {
  width: 26px;
  height: 4px;
  border-radius: 2px;
  border: none;
  background: rgba(255,255,255,.35);
  cursor: pointer;
  padding: 0;
  transition: background .25s, width .25s;
}
.hero-visual .dots button:hover { background: rgba(255,255,255,.6); }
.hero-visual .dots button.active {
  background: var(--cyan);
  width: 38px;
}

/* 首页轮播位临时替换为视频（预览用；原轮播图保留在 index.html 注释中，可整段还原） */
.hero-visual .carousel.is-video .arrow,
.hero-visual .carousel.is-video .dots { display: none; }
.hero-visual .carousel.is-video .slide.is-active { opacity: 1; }
.hero-visual .slide .hero-loop {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 1;
  filter: brightness(.82) contrast(1.04) saturate(.95);
}
.hero-badge, .hero-badge2 {
  position: absolute; z-index: 6;
  background: rgba(8,14,26,.55); border: 1px solid var(--cyan);
  border-radius: 14px; padding: 12px 16px;
  box-shadow: var(--glow); backdrop-filter: none;
  pointer-events: none;
}
.hero-badge2 { left: 14px; top: 14px; }    /* 不良率 · 左上 */
.hero-badge { right: 14px; bottom: 14px; }  /* 交付准时率 · 右下 */
.hero-badge .t, .hero-badge2 .t { font-size: 12px; color: var(--muted); letter-spacing: .5px; }
.hero-badge .v, .hero-badge2 .v { font-size: 19px; font-weight: 800; color: var(--cyan); }

/* ===== 区块 ===== */
section.block { padding: 72px 0; position: relative; z-index: 1; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 46px; }
.section-head .tag { color: var(--cyan); font-size: 13px; letter-spacing: 3px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; margin: 12px 0 10px; }
.section-head p { color: var(--muted); font-size: 16px; }

/* 卡片 */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; transition: .25s; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.5); box-shadow: 0 18px 50px rgba(0,0,0,.45); }
.card .ic { width: 48px; height: 48px; border-radius: 12px; background: rgba(34,211,238,.1); display: grid; place-items: center; font-size: 24px; margin-bottom: 16px; border: 1px solid var(--border); }
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }
/* SVG icon inside .card .ic (服务能力) */
.card .ic svg { width: 24px; height: 24px; color: var(--cyan); stroke: currentColor; }
/* 服务能力卡片：略增左侧 3px 装饰条 */
.svc-card { padding: 0 !important; overflow: hidden; border-left: 3px solid transparent; }
.svc-card:hover { border-left-color: var(--cyan); }
.svc-thumb { aspect-ratio: 16 / 10; overflow: hidden; background: #0a1020; }
.svc-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s; }
.svc-card:hover .svc-thumb img { transform: scale(1.06); }
.svc-card .ic { margin: 18px 22px 8px 28px; }
.svc-card h3 { padding: 0 22px 0 28px; }
.svc-card p { padding: 0 22px 22px 28px; }

/* ===== 服务流程（首屏下方主体） ===== */
.flow-grid {
  display: grid; gap: 22px;
  grid-template-columns: repeat(4, 1fr);
}
.flow-step {
  background: rgba(255,255,255,.025);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  position: relative; transition: .25s;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.flow-step:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.55); box-shadow: 0 18px 50px rgba(0,0,0,.45); }
.flow-thumb { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #0a1020; }
.flow-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s; }
.flow-step:hover .flow-thumb img { transform: scale(1.06); }
.flow-thumb::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(7,11,22,0) 45%, rgba(7,11,22,0.55) 100%);
}
.flow-num {
  position: absolute; top: 12px; left: 14px; z-index: 1;
  font-size: 30px; font-weight: 800; line-height: 1;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
  font-variant-numeric: tabular-nums;
  filter: drop-shadow(0 0 10px rgba(0,0,0,.55));
}
.flow-body { padding: 22px 24px 24px 30px; border-left: 3px solid transparent; transition: border-color .25s; }
.flow-step:hover .flow-body { border-left-color: var(--cyan); }
.flow-body h3 { font-size: 18px; margin-bottom: 8px; }
.flow-body p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.flow-body .check { margin-top: 14px; font-size: 12px; color: var(--cyan); letter-spacing: 1.5px; text-transform: uppercase; display: inline-flex; gap: 6px; align-items: center; }
.flow-body .check::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 6px var(--cyan); }
@media (max-width: 1024px) { .flow-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px)  { .flow-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .flow-grid { grid-template-columns: 1fr; } }

/* 行业占比条 */
.bars { display: grid; gap: 16px; }
.bar-row { display: grid; grid-template-columns: 140px 1fr 56px; align-items: center; gap: 14px; }
.bar-row .name { color: var(--text); font-size: 15px; }
.bar-track { height: 12px; background: rgba(255,255,255,.06); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent-grad); border-radius: 999px; width: 0; transition: width 1.1s ease; }
.bar-row .pct { color: var(--cyan); font-weight: 700; text-align: right; }

/* 图片画廊 */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery figure { margin: 0; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); aspect-ratio: 4/3; background: #0a1120; }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: .4s; }
.gallery figure:hover img { transform: scale(1.06); }

/* 列表 */
.feature-list { list-style: none; display: grid; gap: 10px; }
.feature-list li { padding-left: 26px; position: relative; color: var(--text); }
.feature-list li::before { content: "▹"; position: absolute; left: 0; color: var(--cyan); }
.tag-group { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 12px; }
.tag-group span { border: 1px solid var(--border); border-radius: 999px; padding: 6px 13px; font-size: 13px; color: var(--muted); background: rgba(255,255,255,.02); }

/* 设备清单表 */
.equip-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.equip-table th, .equip-table td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--border); font-size: 15px; }
.equip-table th { color: var(--cyan); font-weight: 600; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; }
.equip-table td .qty { color: var(--cyan); font-weight: 700; }

/* 目标指标 */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.metric { text-align: center; padding: 26px 14px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--panel); }
.metric .v { font-size: 34px; font-weight: 800; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.metric .l { color: var(--muted); font-size: 14px; margin-top: 6px; }

/* ===== 联系 / 留言 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: stretch; }
.info-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; display: flex; flex-direction: column; }
.info-card .row { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--border); }
.info-card .row:last-child { border-bottom: none; }
.info-card .row .k { color: var(--cyan); width: 76px; flex-shrink: 0; font-size: 14px; }
.info-card .row .val { color: var(--text); font-size: 15px; }

.about-brief { margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--border); }
.about-brief h4 { color: var(--cyan); font-size: 14px; font-weight: 700; letter-spacing: 1px; margin-bottom: 10px; }
.about-brief p { color: var(--muted); font-size: 13.5px; line-height: 1.75; margin-bottom: 10px; }
.about-brief p:last-of-type { margin-bottom: 14px; }
.about-brief .brief-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0 0 18px; }
.about-brief .brief-tags li {
  font-size: 12.5px; color: var(--cyan);
  padding: 5px 12px;
  background: rgba(34,211,238,.08);
  border: 1px solid rgba(34,211,238,.25);
  border-radius: 999px;
}

form.contact-form { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; display: flex; flex-direction: column; }
.field { margin-bottom: 18px; }
.field:last-of-type { margin-bottom: 0; }
.field label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; border-radius: 11px; border: 1px solid var(--border);
  background: rgba(255,255,255,.03); color: var(--text); font-size: 15px; font-family: inherit; transition: .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34,211,238,.15); }
.field textarea { min-height: 120px; resize: vertical; }
.contact-form .btn-primary { margin-top: auto; align-self: flex-start; }
.form-msg { font-size: 14px; margin-top: 12px; min-height: 20px; }
.form-msg.ok { color: var(--cyan); }
.form-msg.err { color: #f87171; }

/* ===== 新闻 ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: .25s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.5); box-shadow: 0 18px 50px rgba(0,0,0,.45); }
.news-card .thumb { aspect-ratio: 16/9; background: #0a1120 center/cover no-repeat; border-bottom: 1px solid var(--border); }
.news-card .body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.news-card .date { color: var(--cyan); font-size: 12.5px; letter-spacing: 1px; }
.news-card h3 { font-size: 18px; margin: 8px 0 10px; line-height: 1.4; }
.news-card p { color: var(--muted); font-size: 14px; flex: 1; }
.news-card .more { margin-top: 14px; color: var(--cyan); font-size: 14px; font-weight: 600; }
.news-detail { max-width: 820px; margin: 0 auto; }
.news-detail .cover { width: 100%; aspect-ratio: 16/8; border-radius: var(--radius); background: #0a1120 center/cover no-repeat; border: 1px solid var(--border); margin: 22px 0; }
.news-detail .content { color: #cdd8ec; font-size: 16.5px; line-height: 1.9; }
.news-detail .content img, .news-detail .content video { max-width: 100%; height: auto; border-radius: 12px; margin: 14px 0; display: block; border: 1px solid var(--border); }
.news-detail .content h2 { font-size: 24px; margin: 22px 0 10px; }
.news-detail .content h3 { font-size: 20px; margin: 18px 0 8px; }
.news-detail .content p { margin: 10px 0; }
.news-detail .content ul, .news-detail .content ol { margin: 10px 0 10px 22px; }
.news-detail .content a { color: var(--cyan); text-decoration: underline; }
.news-detail .content blockquote { border-left: 3px solid var(--cyan); padding-left: 14px; color: var(--muted); margin: 12px 0; }
.news-detail h1 { font-size: clamp(26px, 4vw, 38px); }
.empty { text-align: center; color: var(--muted); padding: 50px 0; }

/* ===== 页脚 ===== */
.footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 46px 0 26px; background: rgba(7,11,22,.6); position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; }
.footer h4 { font-size: 15px; margin-bottom: 14px; color: var(--text); }
.footer a, .footer p { color: var(--muted); font-size: 14px; display: block; margin-bottom: 8px; }
.footer a:hover { color: var(--cyan); }
.footer .copy { text-align: center; color: var(--muted); font-size: 13px; margin-top: 30px; border-top: 1px solid var(--border); padding-top: 20px; }

/* ===== 后台 ===== */
.admin-wrap { max-width: 1080px; margin: 0 auto; padding: 40px 22px; position: relative; z-index: 1; }
.login-card { max-width: 400px; margin: 90px auto; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.login-card h2 { text-align: center; margin-bottom: 6px; }
.login-card .sub { text-align: center; color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.admin-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.admin-tabs { display: flex; gap: 8px; margin-bottom: 22px; border-bottom: 1px solid var(--border); }
.admin-tabs button { background: none; border: none; color: var(--muted); padding: 12px 16px; cursor: pointer; font-size: 15px; border-bottom: 2px solid transparent; }
.admin-tabs button.active { color: var(--cyan); border-bottom-color: var(--cyan); }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 12px; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: top; }
.table th { color: var(--cyan); font-size: 12.5px; text-transform: uppercase; letter-spacing: 1px; }
.badge { font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.badge.unread { background: rgba(34,211,238,.15); color: var(--cyan); }
.badge.read { background: rgba(255,255,255,.06); color: var(--muted); }
.link-btn { color: var(--cyan); cursor: pointer; background: none; border: none; font-size: 13.5px; margin-right: 10px; }
.link-btn.danger { color: #f87171; }
.modal { position: fixed; inset: 0; background: rgba(4,8,16,.7); display: none; place-items: center; z-index: 100; padding: 20px; }
.modal.open { display: grid; }
.modal-box { background: var(--panel-solid); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; width: 100%; max-width: 620px; max-height: 86vh; overflow: auto; }
.modal-box h3 { margin-bottom: 16px; }

/* ===== 响应式 ===== */
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .news-grid, .gallery, .metrics { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-ai { padding: 6px 12px; font-size: 13px; }
  .nav-ai .ai-hex { width: 16px; height: 16px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; background: var(--panel-solid); border-bottom: 1px solid var(--border); padding: 12px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-ai span { display: none; }
  .nav-ai { padding: 8px; margin-left: auto; margin-right: 10px; }
  .grid-2, .grid-3, .grid-4, .news-grid, .gallery, .metrics, .footer-grid { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 110px 1fr 48px; }
  .hero { padding: 60px 0 40px; }
}

/* ===== 富文本编辑器 ===== */
.editor { border: 1px solid var(--border); border-radius: 11px; overflow: hidden; background: rgba(255,255,255,.03); }
.editor-toolbar { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px; border-bottom: 1px solid var(--border); background: rgba(7,11,22,.5); }
.editor-toolbar button { background: rgba(255,255,255,.04); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 11px; font-size: 13px; cursor: pointer; transition: .15s; }
.editor-toolbar button:hover { border-color: var(--cyan); color: var(--cyan); }
.tb-sep { width: 1px; background: var(--border); margin: 2px 4px; }
.editor-area { min-height: 260px; max-height: 460px; overflow: auto; padding: 16px; font-size: 15px; line-height: 1.8; outline: none; color: var(--text); }
.editor-area:focus { box-shadow: inset 0 0 0 2px rgba(34,211,238,.18); }
.editor-area:empty::before { content: attr(data-placeholder); color: var(--muted); }
.editor-area img, .editor-area video { max-width: 100%; border-radius: 8px; margin: 8px 0; display: block; }
.editor-area h2 { font-size: 22px; margin: 10px 0; }
.editor-area a { color: var(--cyan); }
.upload-status { font-size: 13px; margin-top: 8px; color: var(--muted); min-height: 18px; }

/* ===== 页头 ===== */
.page-hero { padding: 72px 0 30px; text-align: center; position: relative; z-index: 1; }
.page-hero .tag { color: var(--cyan); letter-spacing: 3px; font-size: 13px; text-transform: uppercase; }
.page-hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; margin: 12px 0 10px; }
.page-hero p { color: var(--muted); font-size: 17px; }

/* ===== 视频（内容宽度） ===== */
.video-block { padding: 8px 0 36px; }
.vh-stage {
  position: relative; width: 100%;
  /* 16:9 宽高比（height = width × 9/16）。双保险：aspect-ratio 现代浏览器生效，
     padding-bottom 兼容老浏览器。height:0 防止任何内容先撑出非 16:9 的高度。 */
  height: 0;
  aspect-ratio: 16 / 9;
  padding-bottom: 56.25%;
  border-radius: var(--radius); overflow: hidden;
  background: #05080f; border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0,0,0,.45);
}
.vh-video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0; background: #05080f; display: block;
}
.vh-scrim {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg,
    rgba(7,11,22,.34) 0%,
    rgba(7,11,22,.08) 42%,
    rgba(7,11,22,.62) 78%,
    rgba(7,11,22,.92) 100%);
}
.vh-content {
  position: absolute; z-index: 2; left: 0; right: 0; bottom: 60px;
  padding: 0 38px; text-align: left;
}
.vh-content .tag { color: var(--cyan); letter-spacing: 3px; font-size: 13px; text-transform: uppercase; }
.vh-content h1 { font-size: clamp(26px, 3.4vw, 42px); font-weight: 800; margin: 10px 0 8px; text-shadow: 0 2px 18px rgba(0,0,0,.5); }
.vh-content p { color: #cfd9ea; font-size: 16px; text-shadow: 0 2px 12px rgba(0,0,0,.5); }
.vh-controls {
  position: absolute; z-index: 3; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 72px 14px 20px;
  background: linear-gradient(0deg, rgba(5,8,15,.86) 0%, rgba(5,8,15,0) 100%);
  /* 默认隐藏：播放中且鼠标不在视频上时淡出，鼠标移入视频区或暂停时再淡入 */
  opacity: 0;
  transition: opacity .3s ease;
}
/* 仅鼠标移到底部那条窄控件栏上 → 显示控件（不再整个视频触发） */
.vh-controls:hover { opacity: 1; }
/* 暂停状态始终显示（方便用户点播放键恢复） */
.vh-stage.paused .vh-controls { opacity: 1; }
/* 声音开关：始终可见（默认静音，需让用户一眼看到如何开声）。
   独立于 .vh-controls，故不受其隐藏/淡出影响；浮在右下角。 */
.vh-mute-float {
  position: absolute; right: 16px; bottom: 14px; z-index: 4;
  opacity: 1;
}
.vh-btn {
  flex: 0 0 auto; width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border); background: rgba(7,11,22,.55); color: var(--text);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: .2s; -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.vh-btn:hover { border-color: var(--cyan); color: var(--cyan); box-shadow: var(--glow); }
.vh-btn svg { width: 20px; height: 20px; fill: currentColor; stroke: currentColor; stroke-width: 0; }
.vh-btn .ic-play { display: none; }
.vh-btn .ic-sound { display: none; }
.vh-stage.paused .vh-btn#vhPlay .ic-pause { display: none; }
.vh-stage.paused .vh-btn#vhPlay .ic-play { display: block; }
.vh-stage.unmuted .vh-btn#vhMute .ic-muted { display: none; }
.vh-stage.unmuted .vh-btn#vhMute .ic-sound { display: block; }
.vh-progress {
  position: relative; flex: 1 1 auto; height: 6px; border-radius: 999px;
  background: rgba(255,255,255,.18); cursor: pointer; overflow: visible;
}
.vh-progress-buffer { position: absolute; left: 0; top: 0; height: 100%; width: 0; background: rgba(255,255,255,.30); border-radius: 999px; }
.vh-progress-played { position: absolute; left: 0; top: 0; height: 100%; width: 0; background: var(--accent-grad); border-radius: 999px; }
.vh-progress-knob {
  position: absolute; top: 50%; left: 0; width: 13px; height: 13px; border-radius: 50%;
  background: #fff; transform: translate(-50%,-50%); box-shadow: 0 0 8px rgba(34,211,238,.85);
  opacity: 0; transition: opacity .15s; pointer-events: none;
}
.vh-progress:hover .vh-progress-knob, .vh-progress:focus .vh-progress-knob { opacity: 1; }
.vh-time { flex: 0 0 auto; color: #cfd9ea; font-size: 12px; font-variant-numeric: tabular-nums; min-width: 92px; text-align: right; }
@media (max-width: 640px) {
  .video-block { padding: 4px 0 28px; }
  .vh-time { display: none; }
  .vh-content { bottom: 54px; padding: 0 18px; }
  .vh-content h1 { font-size: clamp(22px, 6vw, 30px); }
}

/* Hero 背景轮播 */
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .9; z-index: 0; }
/* 视频失败回退层：默认隐藏、不预加载图片；仅当视频出错或无法自动播放时才显示并加载 banner-machine.jpg */
.hero-fallback { position: absolute; inset: 0; z-index: 0; background-size: cover; background-position: center; background-repeat: no-repeat; display: none; }
.hero-mask { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,11,22,.45), rgba(7,11,22,.72)); z-index: 1; }
/* 稀薄蓝色薄雾层：在视频与暗色蒙版之上叠加一层青蓝雾气，缓慢飘动 */
.hero-mist {
  position: absolute; inset: -6%; z-index: 1; pointer-events: none;
  background:
    radial-gradient(130% 90% at 50% 16%, rgba(56,189,248,.16), rgba(56,189,248,0) 55%),
    radial-gradient(120% 80% at 82% 92%, rgba(14,165,183,.14), rgba(14,165,183,0) 60%),
    linear-gradient(180deg, rgba(8,30,60,.10), rgba(6,12,24,.22));
  mix-blend-mode: screen;
  animation: heroMist 18s ease-in-out infinite;
}
@keyframes heroMist {
  0%, 100% { transform: translate3d(0,0,0) scale(1.02); opacity: .9; }
  50% { transform: translate3d(-2.5%,1.5%,0) scale(1.06); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-mist { animation: none; }
}
/* hero-badge / hero-badge2 现在以实底不透明卡悬浮在轮播 banner 四角（左上/右下），z-index:6 在箭头(4)与标题(3)之上，背景不透明故半透明 banner 不会透出干扰 */

/* 使命愿景 */
.mv-grid { gap: 20px; }
.mv-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: .25s; position: relative; overflow: hidden; }
.mv-card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.5); box-shadow: 0 18px 50px rgba(0,0,0,.45); }
.mv-ic { width: 52px; height: 52px; border-radius: 14px; background: rgba(34,211,238,.1); display: grid; place-items: center; font-size: 26px; margin-bottom: 16px; border: 1px solid var(--border); }
.mv-card h3 { font-size: 20px; margin-bottom: 10px; }
.mv-card p { color: var(--muted); font-size: 15px; line-height: 1.8; }

/* 优势矩阵 */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; position: relative; overflow: hidden; transition: .25s; }
.adv-card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.5); box-shadow: 0 18px 50px rgba(0,0,0,.45); }
.adv-num { position: absolute; top: 12px; right: 16px; font-size: 34px; font-weight: 800; color: rgba(34,211,238,.18); }
.adv-card .ic { width: 46px; height: 46px; border-radius: 12px; background: rgba(34,211,238,.1); display: grid; place-items: center; font-size: 22px; margin-bottom: 14px; border: 1px solid var(--border); }
.adv-card h3 { font-size: 19px; margin-bottom: 8px; }
.adv-card p { color: var(--muted); font-size: 14px; margin-bottom: 12px; }

/* 制造能力卡片 */
.cap-card { display: block; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--panel); transition: .25s; }
.cap-card:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.5); }
.cap-img { aspect-ratio: 16/10; background: #0a1120 center/cover no-repeat; }
.cap-body { padding: 18px; }
.cap-body h3 { font-size: 18px; margin-bottom: 6px; }
.cap-body p { color: var(--muted); font-size: 14px; }

/* 工艺 */
.proc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.proc-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.proc-card h3 { font-size: 22px; margin-bottom: 14px; }

/* 时间轴 */
.timeline { max-width: 760px; margin: 0 auto; position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--cyan), rgba(34,211,238,.2)); }
.tl-item { position: relative; padding: 0 0 30px 26px; }
.tl-dot { position: absolute; left: -28px; top: 4px; width: 14px; height: 14px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(34,211,238,.15); }
.tl-year { font-size: 20px; font-weight: 800; color: var(--cyan); margin-bottom: 4px; }
.tl-text { color: var(--muted); font-size: 15px; }

/* 荣誉 */
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.honor { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; text-align: center; font-weight: 600; font-size: 15px; transition: .2s; }
.honor:hover { border-color: rgba(34,211,238,.5); transform: translateY(-3px); }

/* 客户评价 */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.quote { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.quote p { color: var(--text); font-size: 15.5px; line-height: 1.8; margin-bottom: 14px; }
.quote .q-from { color: var(--muted); font-size: 13px; }

/* CTA */
.cta-card { text-align: center; padding: 48px; background: linear-gradient(120deg, rgba(34,211,238,.08), rgba(59,130,246,.08)); }
.cta-card h2 { font-size: 30px; margin-bottom: 12px; }
.cta-card p { color: var(--muted); margin-bottom: 24px; }

/* 关于网格 */
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 36px; align-items: start; }
.about-text h2 { font-size: 26px; margin-bottom: 14px; }
.about-text p { color: var(--muted); font-size: 15.5px; line-height: 1.9; margin-bottom: 14px; }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-facts .metric .v { font-size: 30px; }

/* 地图占位 */
.map-box { margin-top: auto; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.map-inner { height: 86px; display: grid; place-items: center; text-align: center; color: var(--muted); font-size: 14px; background: linear-gradient(135deg, rgba(34,211,238,.06), rgba(59,130,246,.06)); }

@media (max-width: 920px) {
  .adv-grid, .honor-grid, .quotes, .about-grid, .proc-grid { grid-template-columns: 1fr; }
}

/* ===== 设备与加工能力 ===== */
.machine-wrap { display: flex; flex-direction: column; gap: 30px; margin-top: 4px; }

/* 能力数字条 */
.mc-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 4px 0 8px; }
.mc-stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 18px; text-align: center; transition: .3s; }
.mc-stat:hover { border-color: rgba(34,211,238,.4); transform: translateY(-3px); }
.mc-stat-num { font-size: 1.9rem; font-weight: 800; line-height: 1.1; letter-spacing: .5px;
  background: linear-gradient(135deg, #22d3ee, #3b82f6); -webkit-background-clip: text; background-clip: text; color: transparent; }
.mc-stat-label { margin-top: 6px; font-size: .82rem; color: var(--muted); letter-spacing: .5px; }

/* 旗舰设备 */
.mc-featured { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin: 8px 0 6px; }
.feat-card { position: relative; margin: 0; background: var(--panel); border: 1px solid var(--border); border-radius: 18px; overflow: hidden; transition: .35s; display: flex; flex-direction: column; }
.feat-card:hover { transform: translateY(-6px); border-color: rgba(34,211,238,.5); box-shadow: 0 18px 44px rgba(0,0,0,.4); }
.feat-img { position: relative; aspect-ratio: 16 / 10; background: #0c1426; overflow: hidden; }
.feat-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s; }
.feat-card:hover .feat-img img { transform: scale(1.06); }
.feat-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,11,22,0) 45%, rgba(7,11,22,.5) 100%); }
.feat-badge { position: absolute; top: 12px; left: 12px; z-index: 2; font-size: .72rem; font-weight: 700; letter-spacing: .5px; padding: 4px 12px; border-radius: 999px;
  background: linear-gradient(135deg, #22d3ee, #3b82f6); color: #04121f; box-shadow: 0 4px 14px rgba(34,211,238,.35); }
.feat-info { padding: 16px 18px 20px; display: flex; flex-direction: column; gap: 5px; }
.feat-type { font-size: .8rem; color: var(--muted); letter-spacing: .5px; }
.feat-model { font-size: 1.32rem; font-weight: 800; color: var(--cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .5px; }
.feat-usage { margin: 4px 0 0; font-size: .86rem; line-height: 1.55; color: var(--muted); }

/* 分组 */
.mc-groups { display: flex; flex-direction: column; gap: 44px; margin-top: 10px; }
.mc-group { scroll-margin-top: 90px; }
.mg-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; padding-bottom: 13px; border-bottom: 1px solid rgba(255,255,255,.09); }
.mg-icon { flex: 0 0 44px; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; color: var(--cyan);
  background: linear-gradient(135deg, rgba(34,211,238,.16), rgba(59,130,246,.16)); border: 1px solid rgba(34,211,238,.3); }
.mg-icon svg { width: 24px; height: 24px; }
.mg-text { flex: 1; min-width: 0; }
.mg-text h3 { margin: 0; font-size: 1.32rem; color: var(--text); letter-spacing: .5px; }
.mg-text p { margin: 4px 0 0; font-size: .86rem; color: var(--muted); letter-spacing: .3px; }
.mg-tag { font-size: .76rem; font-weight: 700; color: var(--cyan); background: rgba(34,211,238,.1); border: 1px solid rgba(34,211,238,.28); padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.mg-count { font-size: .78rem; color: var(--muted); background: rgba(255,255,255,.05); border: 1px solid var(--border); padding: 4px 12px; border-radius: 999px; white-space: nowrap; }

/* 机型卡片 */
.machine-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.machine-card { margin: 0; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: .3s; display: flex; flex-direction: column; }
.machine-card:hover { transform: translateY(-5px); border-color: rgba(34,211,238,.5); box-shadow: 0 16px 38px rgba(0,0,0,.38); }
.mc-img { position: relative; aspect-ratio: 4 / 3; background: #0c1426; overflow: hidden; }
.mc-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .45s; }
.machine-card:hover .mc-img img { transform: scale(1.06); }
.mc-idx { position: absolute; top: 10px; left: 10px; z-index: 2; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .72rem; font-weight: 700; color: var(--text);
  background: rgba(7,11,22,.55); border: 1px solid rgba(255,255,255,.16); padding: 2px 9px; border-radius: 8px; backdrop-filter: blur(2px); }
.machine-card figcaption { padding: 14px 16px 17px; display: flex; flex-direction: column; gap: 6px; }
.mc-model { font-weight: 700; font-size: 1.05rem; color: var(--cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .3px; }
.mc-usage { margin: 0; font-size: .85rem; line-height: 1.55; color: var(--muted); }

@media (max-width: 920px) {
  .mc-stats { grid-template-columns: repeat(2, 1fr); }
  .mc-featured { grid-template-columns: 1fr; }
  .machine-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
}
@media (max-width: 560px) {
  .mc-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .mg-head { flex-wrap: wrap; }
  .mg-tag { order: 3; }
}