/* =========================================================
   武汉中元华飞科技有限公司 - 官网样式
   设计语言：深蓝电力科技风 + 玻璃拟态 + 细腻动效
   ========================================================= */

:root {
  --bg: #071120;
  --bg-2: #0a1b33;
  --panel: rgba(255, 255, 255, 0.05);
  --panel-strong: rgba(255, 255, 255, 0.08);
  --stroke: rgba(255, 255, 255, 0.1);
  --stroke-soft: rgba(255, 255, 255, 0.06);
  --text: #eaf2fd;
  --text-2: #9db1cc;
  --text-3: #6b82a3;
  --blue: #4e9bff;
  --cyan: #3ce0cc;
  --gold: #ffb84d;
  --grad: linear-gradient(120deg, #4e9bff 0%, #3ce0cc 100%);
  --grad-gold: linear-gradient(120deg, #ffb84d, #ff8f5e);
  --radius: 18px;
  --radius-lg: 26px;
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(78, 155, 255, 0.35); color: #fff; }

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #1c3a66, #12304f);
  border-radius: 8px;
  border: 2px solid var(--bg);
}

/* =========================================================
   顶部导航
   ========================================================= */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(7, 17, 32, 0.55);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background .35s ease, box-shadow .35s ease;
}
.site-header.scrolled {
  background: rgba(7, 17, 32, 0.82);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, rgba(78,155,255,.16), rgba(60,224,204,.12));
  border: 1px solid rgba(78, 155, 255, 0.3);
  border-radius: 13px;
}
.brand-mark svg { width: 26px; height: 26px; }
.brand-mark.sm { width: 38px; height: 38px; border-radius: 11px; }
.brand-mark.sm svg { width: 23px; height: 23px; }
.brand-text strong {
  display: block;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  background: linear-gradient(120deg, #fff, #cfe0f7);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-text small {
  display: block;
  font-size: 9px;
  color: var(--text-3);
  letter-spacing: 2.4px;
  margin-top: 1px;
}

.main-nav {
  display: flex;
  gap: 6px;
  margin-left: auto;
}
.main-nav a {
  position: relative;
  padding: 8px 15px;
  font-size: 14.5px;
  color: var(--text-2);
  border-radius: 10px;
  transition: color .25s, background .25s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 3px;
  width: 0; height: 2px;
  background: var(--grad);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width .28s ease;
}
.main-nav a:hover { color: #fff; background: rgba(255,255,255,.05); }
.main-nav a:hover::after, .main-nav a.active::after { width: 18px; }
.main-nav a.active { color: #fff; }

.nav-cta {
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, rgba(78,155,255,.9), rgba(60,224,204,.85));
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(60, 200, 220, 0.25);
  transition: transform .25s, box-shadow .25s;
  white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(60, 200, 220, 0.35); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  margin-left: auto;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--stroke);
  border-radius: 12px;
  cursor: pointer;
}
.nav-toggle span {
  width: 18px; height: 2px;
  margin: 0 auto;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 130px 0 90px;
  overflow: hidden;
  background:
    radial-gradient(900px 500px at 78% -10%, rgba(60, 130, 255, 0.22), transparent 60%),
    radial-gradient(700px 460px at 8% 110%, rgba(60, 224, 204, 0.13), transparent 60%),
    linear-gradient(180deg, #081428 0%, #0a1b33 62%, #071120 100%);
}
.hero-bg { position: absolute; inset: -12% 0; pointer-events: none; will-change: transform; }

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(78,155,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78,155,255,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
}

.circuit-svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .5; }
.circuit-group { animation: pulse-line 7s ease-in-out infinite; }
@keyframes pulse-line {
  0%, 100% { opacity: .55; }
  50% { opacity: .95; }
}

.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.glow-a { width: 420px; height: 420px; top: -120px; right: -80px; background: rgba(78, 155, 255, 0.35); animation: drift 12s ease-in-out infinite alternate; }
.glow-b { width: 360px; height: 360px; bottom: -140px; left: -90px; background: rgba(60, 224, 204, 0.22); animation: drift 14s ease-in-out infinite alternate-reverse; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(40px, 26px) scale(1.12); }
}

.hero-inner { position: relative; z-index: 2; text-align: center; }

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  font-size: 13px;
  color: #bfe8ff;
  background: rgba(78, 155, 255, 0.1);
  border: 1px solid rgba(78, 155, 255, 0.28);
  border-radius: 999px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(60,224,204,.5);
  animation: ping 2.2s infinite;
}
.badge-ghost {
  color: var(--text-2);
  background: rgba(255,255,255,.04);
  border-color: var(--stroke);
}
@keyframes ping {
  0% { box-shadow: 0 0 0 0 rgba(60,224,204,.45); }
  70% { box-shadow: 0 0 0 9px rgba(60,224,204,0); }
  100% { box-shadow: 0 0 0 0 rgba(60,224,204,0); }
}

.hero-title {
  font-size: clamp(38px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.25;
  margin-bottom: 22px;
}
.hero-title .grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  max-width: 680px;
  margin: 0 auto 38px;
  font-size: clamp(15px, 2vw, 17px);
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  font-size: 15.5px;
  font-weight: 600;
  border-radius: 999px;
  transition: transform .25s, box-shadow .25s, background .25s;
}
.btn svg { width: 16px; height: 16px; transition: transform .25s; }
.btn-primary {
  color: #fff;
  background: var(--grad);
  box-shadow: 0 10px 30px rgba(60, 160, 230, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(60, 160, 230, 0.45); }
.btn-primary:hover svg { transform: translateX(4px); }
.btn-ghost {
  color: var(--text);
  background: rgba(255,255,255,.06);
  border: 1px solid var(--stroke);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255,255,255,.11); transform: translateY(-2px); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  max-width: 900px;
  margin: 0 auto;
}
.stat {
  padding: 20px 10px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: transform .3s, border-color .3s, background .3s;
}
.stat:hover {
  transform: translateY(-4px);
  background: var(--panel-strong);
  border-color: rgba(78, 155, 255, 0.35);
}
.stat b {
  display: block;
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat span { font-size: 13px; color: var(--text-2); }

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 3;
  width: 26px; height: 42px;
  border: 1.5px solid rgba(255,255,255,.28);
  border-radius: 999px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.hero-scroll span {
  width: 4px; height: 8px;
  border-radius: 4px;
  background: var(--cyan);
  animation: scroll-dot 1.8s ease-in-out infinite;
}
@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* =========================================================
   通用 Section
   ========================================================= */
.section { position: relative; padding: 104px 0; }
.section-tint { background: linear-gradient(180deg, rgba(78,155,255,.05), rgba(60,224,204,.03) 50%, rgba(78,155,255,.05)); }
.section-tint::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 100% 1px;
}

.section-head { text-align: center; margin-bottom: 58px; }
.kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--cyan);
  margin-bottom: 14px;
  padding: 6px 14px;
  border: 1px solid rgba(60,224,204,.28);
  border-radius: 999px;
  background: rgba(60,224,204,.06);
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-head h2::after {
  content: "";
  display: block;
  width: 52px; height: 3px;
  margin: 16px auto 0;
  border-radius: 3px;
  background: var(--grad);
}
.section-head p { color: var(--text-2); font-size: 15.5px; }

/* =========================================================
   公司概况
   ========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 30px;
  align-items: start;
}

.about-copy {
  padding: 40px 42px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.about-copy > p {
  font-size: 15.5px;
  color: var(--text-2);
  margin-bottom: 16px;
}
.about-copy > p strong { color: var(--text); }

.meta-list { margin-top: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.meta {
  padding: 15px 4px;
  border-top: 1px solid var(--stroke-soft);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.meta:nth-child(odd) { padding-right: 18px; }
.meta span { font-size: 12px; color: var(--text-3); letter-spacing: 1px; }
.meta b { font-size: 14px; font-weight: 600; color: var(--text); }
.meta b.ok { color: var(--cyan); }

.about-card {
  padding: 40px 42px;
  background: linear-gradient(160deg, rgba(78,155,255,.12), rgba(60,224,204,.05)), rgba(255,255,255,.04);
  border: 1px solid rgba(78,155,255,.22);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.about-card h3 { font-size: 21px; font-weight: 700; }
.card-sub { font-size: 13.5px; color: var(--text-2); margin: 6px 0 26px; }

.pie-wrap { display: flex; align-items: center; gap: 30px; margin-bottom: 28px; }
.pie {
  position: relative;
  width: 158px; height: 158px;
  flex-shrink: 0;
  border-radius: 50%;
  background: conic-gradient(var(--blue) 0 var(--p1), var(--cyan) var(--p1) calc(var(--p1) + var(--p2)));
  display: grid;
  place-items: center;
  box-shadow: 0 10px 34px rgba(78, 155, 255, 0.22);
}
.pie-hole {
  width: 106px; height: 106px;
  border-radius: 50%;
  background: var(--bg-2);
  display: grid;
  place-items: center;
  align-content: center;
}
.pie-hole b { font-size: 24px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.pie-hole span { font-size: 11.5px; color: var(--text-3); }

.pie-legend { flex: 1; display: flex; flex-direction: column; gap: 14px; }
.pie-legend li {
  font-size: 14.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.pie-legend li small {
  width: 100%;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-3);
  padding-left: 20px;
}
.swatch { width: 12px; height: 12px; border-radius: 4px; flex-shrink: 0; }
.swatch.s1 { background: var(--blue); }
.swatch.s2 { background: var(--cyan); }

.role-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.role {
  padding: 14px 10px;
  text-align: center;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--stroke-soft);
  border-radius: 14px;
}
.role b { display: block; font-size: 13.5px; color: var(--text); }
.role span { font-size: 12px; color: var(--text-3); }

/* =========================================================
   核心业务
   ========================================================= */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.biz-card {
  position: relative;
  padding: 34px 30px 30px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform .32s ease, border-color .32s, background .32s;
}
.biz-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}
.biz-card:hover { transform: translateY(-6px); border-color: rgba(78,155,255,.35); background: var(--panel-strong); }
.biz-card:hover::before { transform: scaleX(1); }

.biz-icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  margin-bottom: 20px;
  color: var(--cyan);
  background: linear-gradient(150deg, rgba(78,155,255,.18), rgba(60,224,204,.1));
  border: 1px solid rgba(78,155,255,.25);
  border-radius: 16px;
  transition: color .3s, transform .3s;
}
.biz-icon svg { width: 32px; height: 32px; }
.biz-card:hover .biz-icon { transform: scale(1.06) rotate(-3deg); color: #fff; }

.biz-card h3 { font-size: 18.5px; font-weight: 700; margin-bottom: 10px; }
.biz-card p { font-size: 14px; color: var(--text-2); margin-bottom: 18px; }
.tag {
  display: inline-block;
  font-size: 12px;
  color: var(--text-3);
  padding: 5px 12px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
}

/* =========================================================
   资质荣誉
   ========================================================= */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.honor-card {
  position: relative;
  padding: 42px 32px 34px;
  text-align: center;
  background: linear-gradient(170deg, rgba(78,155,255,.1), rgba(255,255,255,.03));
  border: 1px solid rgba(78,155,255,.2);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform .32s, box-shadow .32s;
}
.honor-card:hover { transform: translateY(-6px); box-shadow: 0 24px 50px rgba(0, 0, 0, 0.4); }
.honor-ribbon {
  position: absolute;
  top: 18px; right: -30px;
  padding: 4px 38px;
  font-size: 11px;
  letter-spacing: 2px;
  color: #0a1b33;
  font-weight: 700;
  background: linear-gradient(120deg, var(--gold), #ffd28a);
  transform: rotate(45deg);
}
.honor-icon {
  width: 74px; height: 74px;
  margin: 0 auto 22px;
  display: grid; place-items: center;
  color: var(--gold);
  background: radial-gradient(circle at 30% 25%, rgba(255,184,77,.2), rgba(255,184,77,.04));
  border: 1px solid rgba(255,184,77,.3);
  border-radius: 50%;
}
.honor-icon svg { width: 38px; height: 38px; }
.honor-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; }
.honor-card p { font-size: 14px; color: var(--text-2); }
.honor-card p b { color: var(--text); }

/* =========================================================
   知识产权
   ========================================================= */
.ip-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 24px;
}
.ip-panel {
  padding: 36px 38px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.ip-panel-head {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--stroke-soft);
}
.ip-count {
  font-size: 52px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.ip-panel-head h3 { font-size: 19px; font-weight: 700; }
.ip-panel-head p { font-size: 13px; color: var(--text-3); margin-top: 3px; }

.ip-list { display: flex; flex-direction: column; gap: 14px; }
.ip-list.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.ip-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text);
  padding: 11px 14px;
  background: rgba(255,255,255,.035);
  border: 1px solid var(--stroke-soft);
  border-radius: 12px;
  transition: background .25s, border-color .25s;
}
.ip-list li:hover { background: rgba(78,155,255,.07); border-color: rgba(78,155,255,.3); }
.ip-dot {
  width: 8px; height: 8px;
  margin-top: 7px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--grad);
}
.ip-list li b { font-weight: 600; }
.ip-list li small {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 11.5px;
  color: var(--text-3);
  white-space: nowrap;
}

/* =========================================================
   业绩案例（时间线）
   ========================================================= */
.timeline {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding-left: 44px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 11px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--cyan));
  opacity: .5;
  border-radius: 2px;
}
.tl-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 22px;
  padding: 24px 0;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -38px; top: 30px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--cyan);
  box-shadow: 0 0 0 5px rgba(60,224,204,.12);
}
.tl-date {
  flex-shrink: 0;
  width: 86px;
  padding-top: 4px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.tl-body {
  flex: 1;
  padding: 20px 26px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: 16px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: transform .28s, border-color .28s;
}
.tl-item:hover .tl-body { transform: translateX(6px); border-color: rgba(78,155,255,.3); }
.tl-body h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 6px; }
.tl-body p { font-size: 13.5px; color: var(--text-2); }
.tl-badge {
  flex-shrink: 0;
  margin-top: 16px;
  padding: 4px 13px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
}
.tl-badge.win { color: #8dffd8; background: rgba(60,224,204,.12); border: 1px solid rgba(60,224,204,.35); }
.tl-badge.bid { color: #ffd28a; background: rgba(255,184,77,.1); border: 1px solid rgba(255,184,77,.32); }

/* =========================================================
   合规与信用
   ========================================================= */
.credit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.credit-item {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: transform .28s, border-color .28s;
}
.credit-item:hover { transform: translateY(-4px); border-color: rgba(60,224,204,.3); }
.credit-item svg {
  width: 34px; height: 34px;
  color: var(--cyan);
  margin-bottom: 6px;
}
.credit-item b { font-size: 17px; font-weight: 700; }
.credit-item span { font-size: 13.5px; color: var(--text-3); }

/* =========================================================
   联系方式
   ========================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.contact-card {
  display: block;
  padding: 38px 32px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: transform .3s, border-color .3s, background .3s;
}
a.contact-card:hover { transform: translateY(-6px); border-color: rgba(78,155,255,.35); background: var(--panel-strong); }
.contact-icon {
  width: 62px; height: 62px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
  color: var(--blue);
  background: linear-gradient(150deg, rgba(78,155,255,.18), rgba(60,224,204,.1));
  border: 1px solid rgba(78,155,255,.25);
  border-radius: 18px;
  transition: transform .3s;
}
.contact-card:hover .contact-icon { transform: scale(1.08); }
.contact-icon svg { width: 30px; height: 30px; }
.contact-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 12px; }
.contact-card p { font-size: 14px; color: var(--text-2); line-height: 2; }

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--stroke-soft);
  background: rgba(5, 13, 26, 0.6);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand strong { font-size: 15.5px; font-weight: 700; display: block; }
.footer-brand p { font-size: 11px; color: var(--text-3); letter-spacing: 1.4px; margin-top: 2px; }
.footer-meta { text-align: right; font-size: 12.5px; color: var(--text-3); line-height: 2; }
.footer-meta span { display: block; }

/* =========================================================
   滚动显现动画
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s cubic-bezier(.22,.61,.36,1), transform .8s cubic-bezier(.22,.61,.36,1);
  will-change: opacity, transform;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .credit-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-cta { display: none; }
  .main-nav {
    position: fixed;
    top: 74px; left: 0; right: 0;
    flex-direction: column;
    gap: 2px;
    padding: 14px 20px 22px;
    background: rgba(7, 17, 32, 0.92);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--stroke);
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform .38s cubic-bezier(.22,.61,.36,1), opacity .3s;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 14px 16px; font-size: 16px; border-radius: 12px; }
  .main-nav a::after { display: none; }
  .nav-toggle { display: flex; }

  .about-grid { grid-template-columns: 1fr; }
  .ip-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .meta-list { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .container { padding: 0 20px; }
  .section { padding: 78px 0; }
  .section-head { margin-bottom: 42px; }

  .hero { padding: 120px 0 80px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { margin-bottom: 46px; }
  .btn { flex: 1; justify-content: center; min-width: 140px; }
  .hero-scroll { display: none; }

  .biz-grid { grid-template-columns: 1fr; }
  .about-copy, .about-card { padding: 28px 24px; }
  .pie-wrap { flex-direction: column; align-items: center; text-align: center; }
  .pie-legend { width: 100%; }
  .pie-legend li { justify-content: center; }
  .pie-legend li small { text-align: center; padding-left: 0; }
  .role-row { grid-template-columns: 1fr; }

  .ip-panel { padding: 28px 24px; }
  .ip-list.cols { grid-template-columns: 1fr; }

  .timeline { padding-left: 26px; }
  .tl-item { flex-wrap: wrap; gap: 8px 14px; }
  .tl-item::before { left: -25px; }
  .tl-date { width: auto; }
  .tl-body { min-width: calc(100% - 14px); }
  .tl-badge { margin-top: 0; }

  .credit-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-meta { text-align: center; }
}

/* =========================================================
   优化增补（v2）
   ========================================================= */

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  z-index: 200;
  width: 0%;
  height: 2.5px;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(60, 200, 230, 0.55);
  pointer-events: none;
}

/* ---------- 核心优势 ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.why-item {
  position: relative;
  padding: 32px 30px;
  background: var(--panel);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform .3s, border-color .3s;
}
.why-item::after {
  content: "";
  position: absolute;
  right: -46px; top: -46px;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(78,155,255,.14), transparent 70%);
  transition: transform .4s ease;
}
.why-item:hover { transform: translateY(-5px); border-color: rgba(78,155,255,.32); }
.why-item:hover::after { transform: scale(1.6); }
.why-num {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--cyan);
  margin-bottom: 18px;
}
.why-item h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 10px; }
.why-item p { font-size: 13.8px; color: var(--text-2); }

/* ---------- 证书可视化 ---------- */
.cert {
  position: relative;
  max-width: 820px;
  margin: 34px auto 0;
  padding: 40px 46px;
  background: linear-gradient(150deg, rgba(255,255,255,.07), rgba(255,255,255,.025));
  border: 1px solid rgba(255, 184, 77, 0.28);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  overflow: hidden;
}
.cert::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 184, 77, 0.16);
  border-radius: 16px;
  pointer-events: none;
}
.cert-shine {
  position: absolute;
  top: -60%; left: -40%;
  width: 60%; height: 220%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.06), transparent);
  transform: rotate(20deg);
  animation: cert-scan 9s ease-in-out infinite;
  pointer-events: none;
}
@keyframes cert-scan {
  0%, 60% { left: -40%; }
  100% { left: 130%; }
}
.cert-head { display: flex; align-items: flex-start; gap: 22px; padding-bottom: 26px; border-bottom: 1px dashed rgba(255,184,77,.22); }
.cert-emblem {
  width: 62px; height: 62px;
  flex-shrink: 0;
  display: grid; place-items: center;
  color: var(--gold);
  background: radial-gradient(circle at 30% 25%, rgba(255,184,77,.2), rgba(255,184,77,.04));
  border: 1px solid rgba(255,184,77,.35);
  border-radius: 50%;
}
.cert-emblem svg { width: 34px; height: 34px; }
.cert-label { font-size: 12px; letter-spacing: 3px; color: var(--gold); font-weight: 700; }
.cert-head h3 { font-size: 21px; font-weight: 800; margin: 6px 0 8px; letter-spacing: 1px; }
.cert-head p { font-size: 13.5px; color: var(--text-2); max-width: 560px; }
.cert-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 26px 0;
}
.cert-meta div {
  padding: 12px 14px;
  text-align: center;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--stroke-soft);
  border-radius: 12px;
}
.cert-meta span { display: block; font-size: 11.5px; color: var(--text-3); margin-bottom: 4px; }
.cert-meta b { font-size: 13.5px; font-weight: 700; color: var(--text); font-variant-numeric: tabular-nums; }
.cert-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: 2px;
  padding-top: 6px;
}
.cert-no { color: var(--gold); font-weight: 700; letter-spacing: 1.5px; }

/* ---------- 合作 CTA ---------- */
.cta-section { padding: 30px 0 100px; }
.cta-panel {
  position: relative;
  padding: 64px 48px;
  text-align: center;
  background: linear-gradient(140deg, rgba(78,155,255,.16), rgba(60,224,204,.08)), rgba(255,255,255,.03);
  border: 1px solid rgba(78,155,255,.3);
  border-radius: 30px;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  overflow: hidden;
}
.cta-glow {
  position: absolute;
  width: 420px; height: 420px;
  top: -220px; left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(78,155,255,.28), transparent 65%);
  filter: blur(50px);
  pointer-events: none;
}
.cta-panel h2 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; letter-spacing: 1px; margin: 14px 0 14px; }
.cta-panel > p { font-size: 15px; color: var(--text-2); max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 34px; }
.cta-certs { display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; font-size: 13px; color: var(--text-2); }
.cta-certs .dot { display: inline-block; width: 6px; height: 6px; margin-right: 7px; border-radius: 50%; background: var(--cyan); vertical-align: 2px; }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  z-index: 150;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  color: #fff;
  background: linear-gradient(135deg, rgba(78,155,255,.95), rgba(60,224,204,.9));
  border: none;
  border-radius: 14px;
  box-shadow: 0 10px 26px rgba(60, 160, 230, 0.35);
  cursor: pointer;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity .35s ease, transform .35s ease, box-shadow .3s;
}
.to-top svg { width: 18px; height: 18px; }
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(60, 160, 230, 0.5); }

/* ---------- 页脚导航 ---------- */
.footer-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.footer-nav a {
  padding: 7px 13px;
  font-size: 13.5px;
  color: var(--text-3);
  border-radius: 9px;
  transition: color .25s, background .25s;
}
.footer-nav a:hover { color: #fff; background: rgba(255,255,255,.06); }

/* ---------- 键盘可达性 ---------- */
a:focus-visible, button:focus-visible, .nav-toggle:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 移动端安全区 ---------- */
@supports (padding: max(0px)) {
  .site-header { padding-top: env(safe-area-inset-top); }
  .hero-scroll { bottom: calc(26px + env(safe-area-inset-bottom)); }
  .to-top { bottom: calc(26px + env(safe-area-inset-bottom)); }
}

/* ---------- 优化版响应式 ---------- */
@media (max-width: 1080px) {
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-meta { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .footer-inner { justify-content: center; text-align: center; }
}

@media (max-width: 620px) {
  .why-grid { grid-template-columns: 1fr; }
  .cert { padding: 28px 22px; }
  .cert-head { flex-direction: column; align-items: center; text-align: center; gap: 14px; }
  .cert-head p { margin: 0 auto; }
  .cert-foot { flex-direction: column; gap: 6px; }
  .cta-panel { padding: 46px 24px; }
  .to-top { right: 16px; bottom: 16px; }
}