/* ==========================================================================
   安徽嘉瀚辰智能科技有限公司 — 高端官网样式系统
   ========================================================================== */
:root {
  --bg: #05080f;
  --bg-2: #070c16;
  --panel: rgba(255, 255, 255, 0.028);
  --panel-2: rgba(255, 255, 255, 0.05);
  --line: rgba(146, 196, 255, 0.14);
  --line-soft: rgba(146, 196, 255, 0.08);
  --text: #e9eff8;
  --muted: #94a4bc;
  --dim: #66788f;
  --cyan: #35d8ff;
  --blue: #3f7bff;
  --gold: #d9b876;
  --grad: linear-gradient(120deg, #35d8ff 0%, #3f7bff 60%, #7a5cff 100%);
  --grad-text: linear-gradient(100deg, #eaf6ff 10%, #7fd8ff 55%, #5f8dff 95%);
  --radius: 18px;
  --nav-h: 84px;
  --font: "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-en: "Rajdhani", "Bahnschrift", "Segoe UI", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(53, 216, 255, 0.28); color: #fff; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: #060a12; }
::-webkit-scrollbar-thumb { background: linear-gradient(#1d3350, #35d8ff44); border-radius: 8px; }

/* ---------- 预加载动画 ---------- */
#preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: #05080f;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 22px;
  transition: opacity 0.7s ease, visibility 0.7s;
}
#preloader.hide { opacity: 0; visibility: hidden; }
.pre-mark { width: 74px; height: 74px; animation: prePulse 1.6s ease-in-out infinite; }
.pre-mark path, .pre-mark polyline, .pre-mark circle {
  fill: none; stroke: url(#preGrad); stroke-width: 1.6;
  stroke-dasharray: 240; stroke-dashoffset: 240;
  animation: preDraw 1.8s ease forwards infinite alternate;
}
.pre-word { font-size: 13px; letter-spacing: 0.55em; color: var(--dim); text-transform: uppercase; padding-left: 0.55em; }
@keyframes preDraw { to { stroke-dashoffset: 0; } }
@keyframes prePulse { 0%, 100% { transform: scale(1); opacity: 0.85; } 50% { transform: scale(1.06); opacity: 1; } }

/* ---------- 顶部信息条 ---------- */
.topbar {
  background: linear-gradient(90deg, rgba(16, 28, 48, 0.9), rgba(9, 14, 26, 0.9));
  border-bottom: 1px solid var(--line-soft);
  font-size: 12.5px; color: var(--dim);
  position: relative; z-index: 60;
}
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; height: 38px; }
.topbar span { display: inline-flex; align-items: center; gap: 6px; }
.topbar b { color: var(--cyan); font-weight: 500; letter-spacing: 0.04em; }
.topbar .tb-right { display: flex; gap: 22px; }

.menu-slogan { display: none; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  background: rgba(5, 8, 15, 0.72);
  border-bottom: 1px solid transparent;
  transition: border 0.4s, background 0.4s, box-shadow 0.4s, top 0.35s;
}
.site-header.scrolled {
  border-bottom-color: var(--line-soft);
  background: rgba(5, 8, 15, 0.9);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }
.brand { display: flex; align-items: center; gap: 15px; }
.brand svg { width: 46px; height: 46px; flex: none; }
.logo-img { width: 58px; height: 58px; flex: none; object-fit: contain; filter: drop-shadow(0 0 16px rgba(53, 216, 255, 0.3)); }
.f-logo { width: 48px; height: 48px; }
.brand-name { line-height: 1.25; }
.brand-name .cn { font-size: 23px; font-weight: 700; letter-spacing: 0.12em; }
.brand-name .en { font-size: 11px; letter-spacing: 0.22em; color: var(--dim); text-transform: uppercase; font-family: var(--font-en); }

.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a { position: relative; padding: 10px 14px; font-size: 14.5px; color: #c4d2e4; white-space: nowrap;
  letter-spacing: 0.06em; transition: color 0.3s; }
.nav-links a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px;
  background: var(--grad); border-radius: 2px;
  transform: scaleX(0); transform-origin: center; transition: transform 0.35s cubic-bezier(0.6, 0, 0.2, 1);
}
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

/* 下拉菜单 */
.nav-links .has-sub { position: relative; }
.nav-links .has-sub > a { display: inline-flex; align-items: center; cursor: pointer; }
.nav-links .caret {
  display: inline-block; margin-left: 6px; width: 7px; height: 7px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px); transition: transform 0.3s; opacity: 0.7;
}
.nav-links .has-sub:hover .caret { transform: rotate(225deg) translateY(-1px); }
.submenu {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 10px);
  min-width: 250px; padding: 10px; border-radius: 14px;
  background: rgba(8, 13, 24, 0.97); border: 1px solid var(--line);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  opacity: 0; visibility: hidden; transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
  pointer-events: none;
}
.nav-links .has-sub:hover .submenu, .nav-links .has-sub:focus-within .submenu {
  opacity: 1; visibility: visible; transform: translate(-50%, 2px); pointer-events: auto;
}
.submenu::before { content: ""; position: absolute; top: -6px; left: 50%; width: 12px; height: 12px;
  background: rgba(8, 13, 24, 0.97); border-left: 1px solid var(--line); border-top: 1px solid var(--line);
  transform: translateX(-50%) rotate(45deg); }
.submenu a { display: block; padding: 12px 16px; border-radius: 10px; transition: background 0.25s; }
.submenu a::after { display: none; }
.submenu a:hover { background: rgba(53, 216, 255, 0.08); }
.submenu a b { display: block; font-size: 14.5px; font-weight: 600; letter-spacing: 0.05em; color: #dbe7f5; }
.submenu a span { display: block; font-size: 11.5px; color: var(--dim); margin-top: 3px; letter-spacing: 0.06em; }
.submenu a:hover b { color: var(--cyan); }

/* 产品页拼图 */
.collage { display: grid; grid-template-columns: 1.25fr 1fr; gap: 14px; height: 480px; }
.collage .col { display: grid; grid-template-rows: 1fr 1fr; gap: 14px; }
.collage img { width: 100%; height: 100%; object-fit: cover; border-radius: 14px; border: 1px solid var(--line); transition: transform 0.7s ease; }
.collage a, .collage .cbox { overflow: hidden; border-radius: 14px; display: block; }
.collage .cbox:hover img { transform: scale(1.05); }
section[id] { scroll-margin-top: 130px; }
.nav-cta {
  margin-left: 14px; padding: 10px 22px !important;
  border: 1px solid rgba(53, 216, 255, 0.4); border-radius: 100px;
  color: var(--cyan) !important; font-size: 14px !important;
  background: rgba(53, 216, 255, 0.06);
  transition: all 0.3s;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: rgba(53, 216, 255, 0.14); box-shadow: 0 0 24px rgba(53, 216, 255, 0.25); }

.burger { display: none; width: 42px; height: 42px; background: none; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.burger i { width: 18px; height: 1.6px; background: #cfe0f2; transition: 0.35s; display: block; }
.burger.open i:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.burger.open i:nth-child(2) { opacity: 0; }
.burger.open i:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ---------- 滚动进度 ---------- */
#progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: var(--grad); z-index: 200; box-shadow: 0 0 10px rgba(53, 216, 255, 0.6); }

/* ---------- 通用布局 ---------- */
.wrap { width: min(1200px, 92%); margin: 0 auto; }
section { position: relative; }
.sec { padding: 110px 0; }
.sec-tight { padding: 80px 0; }

.sec-head { max-width: 720px; margin-bottom: 64px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; letter-spacing: 0.32em; color: var(--cyan);
  text-transform: uppercase; font-family: var(--font-en); margin-bottom: 18px;
}
.kicker::before { content: ""; width: 26px; height: 1px; background: var(--cyan); opacity: 0.7; }
.kicker .no { color: var(--dim); }
.sec-title { font-size: clamp(28px, 3.6vw, 44px); font-weight: 700; letter-spacing: 0.04em; line-height: 1.3; }
.sec-title .grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sec-sub { margin-top: 16px; color: var(--muted); font-size: 15.5px; max-width: 640px; }
.sec-head.center .sec-sub { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 34px; border-radius: 100px; font-size: 15px; letter-spacing: 0.1em;
  cursor: pointer; transition: all 0.35s; border: none; overflow: hidden;
}
.btn .arr { transition: transform 0.35s; }
.btn:hover .arr { transform: translateX(5px); }
.btn-primary { background: var(--grad); color: #04121f; font-weight: 600; box-shadow: 0 10px 34px rgba(63, 123, 255, 0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 44px rgba(53, 216, 255, 0.45); }
.btn-ghost { border: 1px solid var(--line); color: #dbe7f5; background: rgba(255, 255, 255, 0.02); }
.btn-ghost:hover { border-color: rgba(53, 216, 255, 0.55); color: var(--cyan); box-shadow: 0 0 30px rgba(53, 216, 255, 0.15); }

/* ---------- HERO ---------- */
.hero {
  position: relative; min-height: calc(100vh - 114px);
  display: flex; align-items: center; overflow: hidden;
}
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 78% 30%, rgba(63, 123, 255, 0.16), transparent 65%),
    radial-gradient(ellipse 45% 40% at 12% 80%, rgba(53, 216, 255, 0.1), transparent 60%),
    var(--bg);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(146, 196, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(146, 196, 255, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; z-index: 2; padding: 90px 0 110px; }
.hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 56px; align-items: center; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid rgba(53, 216, 255, 0.3); border-radius: 100px;
  padding: 7px 18px; font-size: 13px; color: var(--cyan); letter-spacing: 0.14em;
  background: rgba(53, 216, 255, 0.05); margin-bottom: 30px;
}
.hero-tag i { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: blink 2s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.hero h1 {
  font-size: clamp(30px, 4vw, 50px); font-weight: 800; line-height: 1.24; letter-spacing: 0.03em;
}
.hero h1 .grad {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-desc { margin-top: 26px; color: var(--muted); font-size: 16.5px; max-width: 560px; }
.hero-desc b { color: #d8e6f7; font-weight: 600; }
.hero-actions { display: flex; gap: 18px; margin-top: 44px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 34px; margin-top: 52px; flex-wrap: wrap; }
.hero-points .pt { font-size: 13.5px; color: var(--dim); display: flex; align-items: center; gap: 8px; }
.hero-points .pt i { width: 14px; height: 14px; border-radius: 50%; border: 1px solid rgba(53, 216, 255, 0.5); display: inline-flex; align-items: center; justify-content: center; }
.hero-points .pt i::after { content: ""; width: 4px; height: 4px; background: var(--cyan); border-radius: 50%; }

.hero-visual { position: relative; }
.hero-visual .frame {
  position: relative; border-radius: 22px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.55), 0 0 60px rgba(63, 123, 255, 0.12);
  transform: perspective(1200px) rotateY(-7deg) rotateX(3deg);
  transition: transform 0.6s ease;
}
.hero-visual .frame:hover { transform: perspective(1200px) rotateY(0) rotateX(0); }
.hero-visual .frame img { width: 100%; height: 460px; object-fit: cover; }
.frame-scan {
  position: absolute; left: 0; right: 0; height: 90px; top: -90px;
  background: linear-gradient(to bottom, transparent, rgba(53, 216, 255, 0.14), transparent);
  animation: scanY 5.5s linear infinite; pointer-events: none;
}
@keyframes scanY { 0% { top: -90px; } 100% { top: 100%; } }
.frame-chip {
  position: absolute; left: 20px; bottom: 20px; right: 20px;
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(6, 10, 20, 0.72); backdrop-filter: blur(12px);
  border: 1px solid var(--line); border-radius: 14px; padding: 13px 20px;
  font-size: 12.5px; color: var(--muted); letter-spacing: 0.08em;
}
.frame-chip b { color: var(--cyan); font-family: var(--font-en); font-size: 13px; letter-spacing: 0.15em; }

.scroll-hint {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--dim); font-size: 11px; letter-spacing: 0.3em; z-index: 2;
}
.scroll-hint .mouse { width: 22px; height: 34px; border: 1.5px solid var(--dim); border-radius: 12px; position: relative; }
.scroll-hint .mouse::after { content: ""; position: absolute; top: 6px; left: 50%; width: 3px; height: 6px; margin-left: -1.5px; border-radius: 3px; background: var(--cyan); animation: wheel 1.8s infinite; }
@keyframes wheel { 0% { opacity: 1; transform: translateY(0); } 70% { opacity: 0; transform: translateY(10px); } 100% { opacity: 0; } }

/* ---------- 数字统计 ---------- */
.stats-band { border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); background: linear-gradient(180deg, rgba(63, 123, 255, 0.05), transparent); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 46px 20px; text-align: center; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 30%; bottom: 30%; width: 1px; background: var(--line-soft); }
.stat .num { font-family: var(--font-en); font-size: clamp(34px, 3.6vw, 50px); font-weight: 700; letter-spacing: 0.03em; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .num sup { font-size: 0.5em; }
.stat .lab { margin-top: 6px; color: var(--muted); font-size: 14px; letter-spacing: 0.12em; }

/* ---------- 业务卡片 ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.card {
  position: relative; background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 40px 34px; overflow: hidden;
  transition: transform 0.45s cubic-bezier(0.2, 0.6, 0.25, 1), border 0.45s, background 0.45s, box-shadow 0.45s;
  transform-style: preserve-3d; will-change: transform;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(53, 216, 255, 0.09), transparent 45%);
  opacity: 0; transition: opacity 0.4s; pointer-events: none;
}
.card:hover { transform: translateY(-7px); border-color: rgba(53, 216, 255, 0.32); background: var(--panel-2); box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45); }
.card:hover::before { opacity: 1; }
.card .ico {
  width: 58px; height: 58px; border-radius: 15px; margin-bottom: 26px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, rgba(53, 216, 255, 0.14), rgba(63, 123, 255, 0.1));
  border: 1px solid rgba(53, 216, 255, 0.25);
}
.card .ico svg { width: 27px; height: 27px; stroke: var(--cyan); fill: none; stroke-width: 1.5; }
.card h3 { font-size: 20.5px; letter-spacing: 0.05em; margin-bottom: 13px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .more { display: inline-flex; align-items: center; gap: 7px; margin-top: 22px; font-size: 13.5px; color: var(--cyan); letter-spacing: 0.1em; }
.card .more svg { width: 15px; height: 15px; stroke: var(--cyan); fill: none; stroke-width: 1.8; transition: transform 0.3s; }
.card:hover .more svg { transform: translateX(4px); }
.card .idx {
  position: absolute; top: 26px; right: 30px;
  font-family: var(--font-en); font-size: 15px; color: var(--dim); letter-spacing: 0.1em;
}
.card .idx::before { content: "/ "; opacity: 0.5; }

/* ---------- 能力清单（图文横排） ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.split.rev .split-media { order: 2; }
.split-media { position: relative; }
.split-media .imgbox { border-radius: 20px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5); }
.split-media .imgbox img { width: 100%; height: 480px; object-fit: cover; transition: transform 0.8s ease; }
.split-media .imgbox:hover img { transform: scale(1.04); }
.split-media .badge-float {
  position: absolute; right: -18px; bottom: 34px;
  background: rgba(7, 12, 22, 0.85); backdrop-filter: blur(14px);
  border: 1px solid rgba(53, 216, 255, 0.35); border-radius: 16px;
  padding: 18px 26px; text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}
.split-media .badge-float .n { font-family: var(--font-en); font-size: 30px; font-weight: 700; color: var(--cyan); }
.split-media .badge-float .t { font-size: 12.5px; color: var(--muted); letter-spacing: 0.1em; }
.ticks { margin-top: 30px; display: grid; gap: 16px; }
.ticks li { display: flex; gap: 14px; align-items: flex-start; color: var(--muted); font-size: 14.5px; }
.ticks li b { color: #dce8f6; font-weight: 600; }
.ticks li i {
  flex: none; width: 20px; height: 20px; margin-top: 3px; border-radius: 50%;
  background: rgba(53, 216, 255, 0.1); border: 1px solid rgba(53, 216, 255, 0.4);
  display: inline-flex; align-items: center; justify-content: center;
}
.ticks li i svg { width: 10px; height: 10px; stroke: var(--cyan); stroke-width: 2.4; fill: none; }

/* ---------- 流程时间线 ---------- */
.flow-band { background: linear-gradient(180deg, var(--bg), var(--bg-2)); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.flow::before { content: ""; position: absolute; top: 25px; left: 8%; right: 8%; height: 1px; background: linear-gradient(90deg, transparent, rgba(53, 216, 255, 0.5), rgba(63, 123, 255, 0.5), transparent); }
.flow-step { text-align: center; padding: 0 14px; position: relative; }
.flow-step .dot {
  width: 50px; height: 50px; margin: 0 auto 22px; border-radius: 50%;
  background: #0a1220; border: 1px solid rgba(53, 216, 255, 0.4);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-weight: 700; color: var(--cyan); font-size: 15px;
  position: relative; z-index: 1; transition: all 0.4s;
}
.flow-step:hover .dot { box-shadow: 0 0 26px rgba(53, 216, 255, 0.4); transform: scale(1.08); }
.flow-step h4 { font-size: 16.5px; letter-spacing: 0.06em; margin-bottom: 10px; }
.flow-step p { font-size: 13px; color: var(--dim); line-height: 1.65; }

/* ---------- 芯片平台跑马灯 ---------- */
.chips-sec { overflow: hidden; }
.marquee { position: relative; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; gap: 22px; width: max-content; animation: marquee 30s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.chip-item {
  flex: none; display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--line-soft); border-radius: 100px;
  padding: 15px 34px; background: var(--panel);
  transition: border 0.3s, box-shadow 0.3s;
}
.chip-item:hover { border-color: rgba(53, 216, 255, 0.4); box-shadow: 0 0 30px rgba(53, 216, 255, 0.12); }
.chip-item .pin { width: 8px; height: 8px; border-radius: 2px; background: var(--grad); transform: rotate(45deg); }
.chip-item .cn-name { font-size: 17px; font-weight: 600; letter-spacing: 0.08em; }
.chip-item .en-name { font-size: 11.5px; color: var(--dim); letter-spacing: 0.14em; font-family: var(--font-en); text-transform: uppercase; }

/* ---------- 应用领域 ---------- */
.fields-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.field-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line-soft); min-height: 340px;
  display: flex; align-items: flex-end;
}
.field-card img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.8s ease, filter 0.5s;
  filter: saturate(0.85) brightness(0.75);
}
.field-card:hover img { transform: scale(1.07); filter: saturate(1) brightness(0.9); }
.field-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(4, 7, 13, 0.94) 20%, rgba(4, 7, 13, 0.25) 60%, transparent); }
.field-body { position: relative; z-index: 1; padding: 30px; width: 100%; }
.field-body .tag-no { font-family: var(--font-en); font-size: 12px; letter-spacing: 0.3em; color: var(--cyan); }
.field-body h3 { font-size: 21px; margin: 8px 0 10px; letter-spacing: 0.06em; }
.field-body p { font-size: 13.5px; color: var(--muted); max-height: 0; opacity: 0; overflow: hidden; transition: all 0.5s ease; }
.field-card:hover .field-body p { max-height: 120px; opacity: 1; margin-top: 4px; }

/* ---------- 品质带 ---------- */
.quality-band { position: relative; overflow: hidden; }
.quality-band .qb-bg {
  position: absolute; inset: 0; background: url("../img/aoi.jpg") center/cover fixed;
  opacity: 0.16; filter: saturate(0.8);
}
.quality-inner { position: relative; z-index: 1; }
.q-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 56px; }
.q-item { border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 34px 30px; background: rgba(6, 10, 18, 0.55); backdrop-filter: blur(8px); transition: 0.4s; }
.q-item:hover { border-color: rgba(53, 216, 255, 0.35); transform: translateY(-5px); }
.q-item .qn { font-family: var(--font-en); font-size: 13px; color: var(--cyan); letter-spacing: 0.25em; }
.q-item h4 { font-size: 18px; margin: 12px 0 10px; letter-spacing: 0.05em; }
.q-item p { font-size: 13.5px; color: var(--muted); }

/* ---------- CTA ---------- */
.cta-band { position: relative; overflow: hidden; border-top: 1px solid var(--line-soft); }
.cta-orb {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 50% 120%, rgba(63, 123, 255, 0.22), transparent 70%),
    radial-gradient(ellipse 30% 50% at 80% 110%, rgba(53, 216, 255, 0.12), transparent 70%);
}
.cta-inner { position: relative; z-index: 1; text-align: center; padding: 110px 0; }
.cta-inner h2 { font-size: clamp(28px, 3.8vw, 46px); letter-spacing: 0.06em; line-height: 1.35; }
.cta-inner .grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.cta-inner p { margin-top: 18px; color: var(--muted); font-size: 15.5px; }
.cta-inner .btns { margin-top: 42px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line-soft); background: #04060c; position: relative; overflow: hidden; }
.site-footer::before { content: ""; position: absolute; top: 0; left: 15%; right: 15%; height: 1px; background: linear-gradient(90deg, transparent, rgba(53, 216, 255, 0.5), transparent); }
.f-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 0.8fr 1.1fr; gap: 50px; padding: 70px 0 54px; }
.f-brand .brand { margin-bottom: 22px; }
.f-brand p { color: var(--dim); font-size: 13.5px; max-width: 320px; }
.f-col h5 { font-size: 14.5px; letter-spacing: 0.18em; color: #cfdeef; margin-bottom: 22px; font-weight: 600; }
.f-col li { margin-bottom: 13px; }
.f-col a, .f-col li span { color: var(--dim); font-size: 13.5px; transition: color 0.3s; }
.f-col a:hover { color: var(--cyan); }
.f-contact li { display: flex; gap: 10px; align-items: flex-start; }
.f-contact svg { width: 15px; height: 15px; stroke: var(--cyan); fill: none; stroke-width: 1.6; flex: none; margin-top: 4px; }
.f-bottom { border-top: 1px solid var(--line-soft); padding: 22px 0; display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; color: #4d5f76; font-size: 12.5px; }
.f-bottom a { color: #5d7288; transition: color 0.3s; }
.f-bottom a:hover { color: var(--cyan); }

/* ---------- 子页头 ---------- */
.page-hero { position: relative; padding: 130px 0 90px; overflow: hidden; background: radial-gradient(ellipse 55% 70% at 70% 10%, rgba(63, 123, 255, 0.14), transparent 65%), var(--bg); }
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(146, 196, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(146, 196, 255, 0.04) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, #000 30%, transparent 80%);
}
.page-hero .crumb { position: relative; z-index: 1; font-size: 13px; color: var(--dim); letter-spacing: 0.12em; margin-bottom: 22px; }
.page-hero .crumb a:hover { color: var(--cyan); }
.page-hero h1 { position: relative; z-index: 1; font-size: clamp(32px, 4.4vw, 54px); letter-spacing: 0.06em; }
.page-hero .lead { position: relative; z-index: 1; margin-top: 20px; color: var(--muted); max-width: 680px; font-size: 15.5px; }
.page-hero h1 .grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- 时间轴（关于页） ---------- */
.milestones { position: relative; padding-left: 34px; }
.milestones::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 1px; background: linear-gradient(rgba(53, 216, 255, 0.6), rgba(63, 123, 255, 0.2)); }
.ms-item { position: relative; padding-bottom: 40px; }
.ms-item::before { content: ""; position: absolute; left: -31px; top: 7px; width: 11px; height: 11px; border-radius: 50%; background: #0a1220; border: 2px solid var(--cyan); box-shadow: 0 0 12px rgba(53, 216, 255, 0.5); }
.ms-item .yr { font-family: var(--font-en); color: var(--cyan); font-size: 14px; letter-spacing: 0.2em; }
.ms-item h4 { font-size: 17.5px; margin: 8px 0; letter-spacing: 0.05em; }
.ms-item p { color: var(--muted); font-size: 14px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: start; }
.c-card { border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--panel); padding: 34px; display: flex; gap: 20px; transition: 0.4s; }
.c-card + .c-card { margin-top: 20px; }
.c-card:hover { border-color: rgba(53, 216, 255, 0.35); transform: translateX(6px); }
.c-card .ci { flex: none; width: 52px; height: 52px; border-radius: 14px; background: rgba(53, 216, 255, 0.08); border: 1px solid rgba(53, 216, 255, 0.3); display: flex; align-items: center; justify-content: center; }
.c-card .ci svg { width: 23px; height: 23px; stroke: var(--cyan); fill: none; stroke-width: 1.5; }
.c-card h4 { font-size: 16.5px; margin-bottom: 7px; letter-spacing: 0.06em; }
.c-card p { color: var(--muted); font-size: 14px; }
.c-card a.tel { color: var(--cyan); font-family: var(--font-en); font-size: 17px; letter-spacing: 0.05em; }
.form-panel { border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--panel); padding: 42px; }
.form-panel h3 { font-size: 22px; letter-spacing: 0.06em; margin-bottom: 8px; }
.form-panel .fp-sub { color: var(--dim); font-size: 13.5px; margin-bottom: 30px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 13px; color: var(--muted); letter-spacing: 0.1em; margin-bottom: 8px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--line);
  border-radius: 12px; padding: 13px 16px; color: var(--text); font-size: 14.5px; font-family: inherit;
  transition: border 0.3s, box-shadow 0.3s; outline: none;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: rgba(53, 216, 255, 0.55); box-shadow: 0 0 0 3px rgba(53, 216, 255, 0.1); }
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--dim) 50%), linear-gradient(135deg, var(--dim) 50%, transparent 50%); background-position: calc(100% - 21px) 50%, calc(100% - 16px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.form-field select option { background: #0b1220; }

/* ---------- 应用领域（图标卡片） ---------- */
.fields-grid .icard {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line-soft); padding: 36px 30px; min-height: 250px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.012));
  transition: transform 0.45s, border 0.45s, box-shadow 0.45s;
}
.fields-grid .icard::after {
  content: ""; position: absolute; right: -46px; bottom: -46px;
  width: 150px; height: 150px; border-radius: 50%;
  background: radial-gradient(circle, rgba(63, 123, 255, 0.16), transparent 70%);
  opacity: 0.6; transition: opacity 0.4s;
}
.fields-grid .icard:hover { transform: translateY(-7px); border-color: rgba(53, 216, 255, 0.35); box-shadow: 0 28px 56px rgba(0, 0, 0, 0.45); }
.fields-grid .icard:hover::after { opacity: 1; }
.icard .iwrap {
  width: 56px; height: 56px; border-radius: 15px; margin-bottom: 24px;
  background: linear-gradient(140deg, rgba(53, 216, 255, 0.14), rgba(63, 123, 255, 0.1));
  border: 1px solid rgba(53, 216, 255, 0.25);
  display: flex; align-items: center; justify-content: center;
}
.icard .iwrap svg { width: 26px; height: 26px; stroke: var(--cyan); fill: none; stroke-width: 1.5; }
.icard h3 { font-size: 19px; letter-spacing: 0.06em; margin-bottom: 11px; }
.icard p { font-size: 13.5px; color: var(--muted); }
.icard .no { position: absolute; top: 28px; right: 30px; font-family: var(--font-en); font-size: 14px; color: var(--dim); letter-spacing: 0.1em; }

/* ---------- 服务宽卡（列表式） ---------- */
.svc-row {
  display: grid; grid-template-columns: 64px 1fr 1.4fr auto; gap: 30px; align-items: center;
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 30px 36px; background: var(--panel);
  transition: 0.4s; margin-bottom: 18px;
}
.svc-row:hover { border-color: rgba(53, 216, 255, 0.35); background: var(--panel-2); transform: translateX(8px); }
.svc-row .sn { font-family: var(--font-en); font-size: 22px; color: var(--dim); letter-spacing: 0.08em; transition: color 0.3s; }
.svc-row:hover .sn { color: var(--cyan); }
.svc-row h3 { font-size: 19px; letter-spacing: 0.06em; margin-bottom: 7px; }
.svc-row p { font-size: 13.5px; color: var(--muted); }
.svc-row .tags { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.svc-row .tag { font-size: 12px; color: var(--cyan); border: 1px solid rgba(53, 216, 255, 0.3); border-radius: 100px; padding: 5px 14px; letter-spacing: 0.08em; white-space: nowrap; }
@media (max-width: 900px) {
  .svc-row { grid-template-columns: 1fr; gap: 14px; }
  .svc-row .tags { justify-content: flex-start; }
}

/* ---------- 双列特性 ---------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.duo .dcard { border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 36px 32px; background: var(--panel); transition: 0.4s; }
.duo .dcard:hover { border-color: rgba(53, 216, 255, 0.35); transform: translateY(-6px); }
.duo .dcard h3 { font-size: 19px; margin-bottom: 14px; letter-spacing: 0.05em; }
.duo .dcard p { color: var(--muted); font-size: 14px; }
@media (max-width: 900px) { .duo { grid-template-columns: 1fr; } }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.9s cubic-bezier(0.2, 0.6, 0.25, 1), transform 0.9s cubic-bezier(0.2, 0.6, 0.25, 1); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 返回顶部 ---------- */
#toTop {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid rgba(53, 216, 255, 0.4); background: rgba(7, 12, 22, 0.85);
  color: var(--cyan); font-size: 17px; cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: all 0.4s; backdrop-filter: blur(8px);
}
#toTop.show { opacity: 1; visibility: visible; transform: none; }
#toTop:hover { box-shadow: 0 0 24px rgba(53, 216, 255, 0.35); }

/* ---------- 手机端一键拨号 ---------- */
.call-bar { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1320px) and (min-width: 1081px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 10px 8px; font-size: 13.5px; }
  .nav-cta { padding: 9px 15px !important; font-size: 13px !important; }
  .brand-name .cn { font-size: 20px; }
  .logo-img { width: 50px; height: 50px; }
}
@media (max-width: 1080px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .split.rev .split-media { order: 0; }
  .cards-3, .fields-grid, .q-items { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 34px 0; }
  .flow::before { display: none; }
  .hero-visual .frame img { height: 380px; }
  .split-media .imgbox img { height: 380px; }
  .contact-grid { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
}
@media (max-width: 760px) {
  .sec { padding: 76px 0; }
  .hero-inner { padding: 34px 0 64px; }
  .topbar .tb-right { display: none; }
  .logo-img { width: 44px; height: 44px; }
  .brand-name .cn { font-size: 17px; }
  .brand-name .en { font-size: 9px; }
  .nav-links {
    position: fixed; inset: 0; z-index: 99;
    background:
      linear-gradient(160deg, rgba(4, 8, 16, 0.82) 0%, rgba(4, 8, 16, 0.9) 55%, rgba(4, 8, 16, 0.96) 100%),
      url("../img/hero.jpg") center / cover no-repeat;
    flex-direction: column; justify-content: center; align-items: center; gap: 8px;
    opacity: 0; visibility: hidden; transition: 0.4s;
    overflow-y: auto; padding: 90px 20px 40px;
  }
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .site-header.scrolled { background: rgba(5, 8, 15, 0.96); }
  .nav-links.open { opacity: 1; visibility: visible; }
  .nav-links a { font-size: 20px; padding: 13px; text-align: center; }
  .burger { display: flex; position: relative; z-index: 102; }
  /* 菜单展开时品牌区浮在遮罩上方 */
  .site-header .brand { position: relative; z-index: 101; }
  /* 菜单展开：顶部标语条 + 品牌行整体下移 */
  .menu-slogan {
    display: flex; align-items: center; justify-content: center;
    position: absolute; top: 0; left: 0; right: 0; height: 40px;
    font-size: 12.5px; color: #93a7c0; letter-spacing: 0.08em;
    background: linear-gradient(90deg, rgba(16, 28, 48, 0.92), rgba(9, 14, 26, 0.92));
    border-bottom: 1px solid var(--line-soft);
  }
  body.menu-open .site-header { top: 40px; }
  /* 一键拨号条 */
  body { padding-bottom: 78px; }
  .call-bar {
    display: flex; align-items: center; gap: 12px;
    position: fixed; left: 14px; right: 14px; z-index: 92;
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    padding: 11px 12px 11px 14px; border-radius: 16px;
    background: linear-gradient(100deg, rgba(12, 24, 42, 0.96), rgba(8, 15, 27, 0.96));
    border: 1px solid rgba(53, 216, 255, 0.28);
    box-shadow: 0 14px 38px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(53, 216, 255, 0.06) inset;
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    text-decoration: none; color: #fff;
  }
  .call-bar .call-ic {
    width: 40px; height: 40px; flex: none; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    background: var(--grad); color: #04121f;
    box-shadow: 0 6px 18px rgba(53, 216, 255, 0.4);
  }
  .call-bar .call-ic svg { width: 20px; height: 20px; }
  .call-bar .call-txt { display: flex; flex-direction: column; line-height: 1.3; flex: 1; min-width: 0; }
  .call-bar .call-txt b { font-size: 14.5px; letter-spacing: 0.08em; font-weight: 700; }
  .call-bar .call-txt em { font-style: normal; font-size: 12px; color: #8fd8ff; letter-spacing: 0.06em; font-family: var(--font-en); }
  .call-bar .call-btn {
    flex: none; padding: 9px 16px; border-radius: 100px;
    background: var(--grad); color: #04121f;
    font-size: 13px; font-weight: 700; letter-spacing: 0.06em;
  }
  .call-bar:active { transform: scale(0.99); }
  #toTop { right: 16px; bottom: calc(88px + env(safe-area-inset-bottom, 0px)); width: 40px; height: 40px; font-size: 15px; }
  .cards-3, .cards-2, .fields-grid, .q-items, .f-row { grid-template-columns: 1fr; }
  .collage { height: 320px; }
  .hero-points { gap: 16px; }
  .hero-visual .frame { transform: none; }
  .hero-visual .frame img { height: 260px; }
  .split-media .badge-float { right: 12px; }
  .flow { grid-template-columns: 1fr 1fr; gap: 0 10px; }
  .flow::before { display: none; }
  .flow-step { padding: 0 4px 6px; }
  .flow-step .dot { width: 42px; height: 42px; margin: 0 auto 10px; font-size: 13px; }
  .flow-step h4 { font-size: 14.5px; margin-bottom: 4px; }
  .flow-step p { font-size: 12px; line-height: 1.5; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { padding: 30px 10px; }
  .f-grid { grid-template-columns: 1fr; gap: 36px; }
  .form-panel { padding: 28px 22px; }
  /* 移动端下拉展开 */
  .nav-links .has-sub { display: flex; flex-direction: column; align-items: center; }
  .submenu { position: static; transform: none; opacity: 1; visibility: visible; pointer-events: auto;
    background: transparent; border: none; box-shadow: none; padding: 2px 0 6px; min-width: 0; }
  .submenu::before { display: none; }
  .submenu a { padding: 8px 13px; text-align: center; }
  .submenu a span { display: none; }
}

/* ==========================================================================
   SEO 落地页正文排版（.rich-body）
   ========================================================================== */
.rich-body { max-width: 900px; }
.rich-body > p { margin-bottom: 18px; }
.rich-body h2 {
  position: relative; margin: 44px 0 18px; padding-left: 16px;
  font-size: clamp(20px, 2.2vw, 26px); color: var(--text); letter-spacing: 0.04em;
}
.rich-body h2::before {
  content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 2px;
  background: var(--grad); border-radius: 2px;
}
.rich-body h2:first-child { margin-top: 0; }
.rich-body h3 {
  margin: 28px 0 12px; font-size: 16.5px; color: var(--cyan);
  letter-spacing: 0.05em; font-weight: 600;
}
.rich-body p { margin-bottom: 16px; }
.rich-body ul { margin: 0 0 18px 2px; }
.rich-body li {
  position: relative; padding-left: 20px; margin-bottom: 9px; list-style: none;
}
.rich-body li::before {
  content: ""; position: absolute; left: 0; top: 11px; width: 6px; height: 6px;
  border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px rgba(53, 216, 255, 0.7);
}
.rich-body strong { color: var(--text); font-weight: 600; }
.rich-body a { color: var(--cyan); border-bottom: 1px solid rgba(53, 216, 255, 0.35); transition: border-color .25s, color .25s; }
.rich-body a:hover { color: #8fe8ff; border-bottom-color: #8fe8ff; }
.rich-body b { color: var(--text); }
@media (max-width: 760px) {
  .rich-body { font-size: 14.5px !important; line-height: 1.8 !important; }
  .rich-body h2 { margin: 32px 0 14px; padding-left: 13px; }
  .rich-body h3 { margin: 22px 0 10px; font-size: 15.5px; }
  .rich-body li { padding-left: 17px; }
  .rich-body li::before { top: 9px; width: 5px; height: 5px; }
}