/* =========================================================
   KEEMIAO · 官网样式
   ========================================================= */

:root {
  --brand: #00b26b;
  --brand-600: #009a5c;
  --brand-050: #e8f8f0;
  --blue: #2f7bff;
  --ink: #0b1220;
  --ink-2: #1c2735;
  --text: #334155;
  --muted: #6b7a90;
  --line: #e6ebf2;
  --line-2: #eef2f7;
  --bg: #ffffff;
  --bg-soft: #f6f9fb;
  --bg-dark: #07121c;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 2px 10px rgba(11, 18, 32, .05);
  --shadow: 0 12px 34px rgba(11, 18, 32, .09);
  --shadow-lg: 0 26px 60px rgba(11, 18, 32, .16);
  --header-h: 72px;
  --maxw: 1200px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { color: var(--ink); margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.grad {
  background: linear-gradient(100deg, #00d68f 0%, #12b981 40%, #2f7bff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 30px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s, border-color .25s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(120deg, #00c47a, #00a862);
  color: #fff;
  box-shadow: 0 12px 26px rgba(0, 178, 107, .28);
}
.btn--primary:hover { box-shadow: 0 16px 34px rgba(0, 178, 107, .36); }

.btn--ghost {
  background: rgba(255, 255, 255, .06);
  border-color: rgba(255, 255, 255, .22);
  color: #eaf2f7;
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .38); }
.btn__arrow { transition: transform .25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--block { width: 100%; }

/* ---------------- 头部 ---------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  transition: background .3s, box-shadow .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.header__inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 20px; }

.logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; }
.logo__mark { width: 36px; height: 36px; display: grid; place-items: center; }
.logo__mark svg { width: 32px; height: 32px; color: var(--brand); }
.logo__text { display: flex; flex-direction: column; line-height: 1.1; }
.logo__text strong { font-size: 17px; letter-spacing: .04em; color: #fff; }
.logo__text em { font-style: normal; font-size: 10px; letter-spacing: .22em; color: rgba(255, 255, 255, .55); }
.logo__text--solo { justify-content: center; }
.logo__text--solo strong { font-size: 18px; letter-spacing: .14em; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav > a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, .82);
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav > a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.nav__cta {
  margin-left: 10px;
  padding: 9px 20px !important;
  border-radius: 999px !important;
  background: linear-gradient(120deg, #00c47a, #00a862);
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(0, 178, 107, .3);
}
.nav__cta:hover { background: linear-gradient(120deg, #00d184, #00b26b); }

/* 滚动后 */
.header.is-stuck {
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
}
.header.is-stuck .logo__text strong { color: var(--ink); }
.header.is-stuck .logo__text em { color: var(--muted); }
.header.is-stuck .nav > a { color: var(--ink-2); }
.header.is-stuck .nav > a:hover { color: var(--brand-600); background: var(--brand-050); }

.menu-btn {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid rgba(255, 255, 255, .22);
  background: transparent;
  border-radius: 10px;
  padding: 0;
  cursor: pointer;
}
.menu-btn span {
  display: block; width: 18px; height: 1.8px; margin: 4px auto;
  background: #fff; border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
}
.header.is-stuck .menu-btn { border-color: var(--line); }
.header.is-stuck .menu-btn span { background: var(--ink); }
.menu-btn.is-open span:nth-child(1) { transform: translateY(5.8px) rotate(45deg); }
.menu-btn.is-open span:nth-child(2) { opacity: 0; }
.menu-btn.is-open span:nth-child(3) { transform: translateY(-5.8px) rotate(-45deg); }

/* ---------------- 首屏 ---------------- */
.hero { position: relative; padding: calc(var(--header-h) + 84px) 0 96px; background: var(--bg-dark); overflow: hidden; }
.hero__bg { position: absolute; inset: 0; pointer-events: none; }
.hero__bg .grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 40%, transparent 100%);
}
.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.glow--a { width: 520px; height: 520px; left: -120px; top: -140px; background: radial-gradient(circle, rgba(0, 210, 143, .55), transparent 70%); }
.glow--b { width: 560px; height: 560px; right: -160px; top: 40px; background: radial-gradient(circle, rgba(47, 123, 255, .42), transparent 70%); }

.hero__inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: stretch; }

.hero__copy { display: flex; flex-direction: column; justify-content: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 16px; margin-bottom: 26px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  background: rgba(255, 255, 255, .05);
  color: rgba(255, 255, 255, .8);
  font-size: 13.5px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 4px rgba(0, 178, 107, .2); }

.hero__title { color: #fff; font-size: clamp(29px, 4.4vw, 48px); line-height: 1.22; letter-spacing: -.02em; }
.hero__desc { margin-top: 22px; max-width: 560px; color: rgba(226, 236, 244, .72); font-size: 16.5px; }
.hero__actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero__chips { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 10px; }
.hero__chips li {
  display: inline-flex; align-items: center; gap: 7px;
  height: 34px; padding: 0 15px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  background: rgba(255, 255, 255, .05);
  color: rgba(255, 255, 255, .75);
  font-size: 13.5px;
}
.hero__chips li::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 3px rgba(0, 178, 107, .18);
}

/* 数据看板 */
.hero__panel { position: relative; display: flex; min-height: 640px; }
.panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .025));
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.panel__bar {
  flex: none;
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .04);
}
.panel__dots { display: flex; gap: 6px; }
.panel__dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, .22); }
.panel__title { flex: 1; color: rgba(255, 255, 255, .7); font-size: 13px; }
.panel__live { display: inline-flex; align-items: center; gap: 6px; color: #7ef0bd; font-size: 12px; }
.panel__live i { width: 7px; height: 7px; border-radius: 50%; background: #00d68f; animation: pulse 1.6s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.8); } }

.panel__body { flex: 1; min-height: 0; padding: 20px; display: flex; flex-direction: column; }
.panel__kpis { flex: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.kpi {
  padding: 18px 18px 20px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 14px;
  background: rgba(255, 255, 255, .03);
}
.kpi span { color: rgba(255, 255, 255, .55); font-size: 12.5px; }
.kpi__val { margin: 2px 0 0; display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 10px; }
.kpi strong { color: #fff; font-size: 19px; font-variant-numeric: tabular-nums; }
.kpi strong em { font-style: normal; font-size: 12px; margin-left: 5px; color: rgba(255, 255, 255, .5); }
.kpi b { margin-left: auto; font-size: 12px; font-weight: 600; }
.kpi b.up { color: #4ade9b; }

.panel__modes { flex: none; margin-top: 12px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.pmode {
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  height: 28px; border-radius: 9px;
  border: 1px solid rgba(255, 255, 255, .09);
  background: rgba(255, 255, 255, .03);
  color: rgba(255, 255, 255, .72); font-size: 11.5px; white-space: nowrap;
}
.pmode i { width: 5px; height: 5px; border-radius: 50%; background: #00d68f; flex: none; }
.pmode--link { border-color: rgba(0, 214, 143, .32); background: rgba(0, 214, 143, .08); color: #7ef0bd; }

.chart {
  flex: 1; min-height: 96px;
  margin-top: 12px; padding: 12px;
  border: 1px solid rgba(255, 255, 255, .08); border-radius: 14px;
  background: rgba(6, 18, 28, .5);
  display: flex; flex-direction: column;
}
.chart__head { flex: none; display: flex; align-items: center; gap: 10px; color: rgba(255, 255, 255, .68); font-size: 12.5px; margin-bottom: 8px; }
.tag { padding: 2px 9px; border-radius: 999px; font-size: 11px; }
.tag--green { background: rgba(0, 214, 143, .14); color: #5fe8b1; }
.tag--blue { background: rgba(62, 139, 255, .16); color: #8fb8ff; }
.chart__svg { flex: 1 0 auto; width: 100%; height: 96px; min-height: 0; }
.chart__grid line { stroke: rgba(255, 255, 255, .08); stroke-width: 1; }
.chart__axis { flex: none; display: flex; justify-content: space-between; color: rgba(255, 255, 255, .35); font-size: 11px; margin-top: 4px; }

.panel__list { flex: none; margin-top: 12px; display: grid; gap: 7px; }
.panel__list li {
  position: relative;
  padding: 8px 12px 8px 30px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .035);
  color: rgba(255, 255, 255, .82);
  font-size: 13px; line-height: 1.5;
}
.panel__list em { font-style: normal; color: rgba(255, 255, 255, .45); font-size: 12px; }
.status { position: absolute; left: 11px; top: 13px; width: 8px; height: 8px; border-radius: 50%; }
.status--ok { background: #00d68f; }
.status--run { background: #3e8bff; }
.status--warn { background: #ffb020; }

/* ---------------- 通用区块 ---------------- */
.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--contact { background: linear-gradient(180deg, #fff, var(--bg-soft)); }

.sec-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.sec-tag {
  display: inline-block; margin-bottom: 14px;
  padding: 5px 14px; border-radius: 999px;
  background: var(--brand-050); color: var(--brand-600);
  font-size: 13px; font-weight: 600; letter-spacing: .04em;
}
.sec-title { font-size: clamp(26px, 3vw, 38px); }
.sec-sub { margin-top: 16px; color: var(--muted); font-size: 16px; }

/* ---------------- 业务矩阵 ---------------- */
.biz { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.biz__card {
  position: relative;
  padding: 38px 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.biz__card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #d8e2ec; }
.biz__card::before {
  content: ""; position: absolute; inset: -40% -30% auto auto;
  width: 320px; height: 320px; border-radius: 50%; filter: blur(70px); opacity: .16;
}
.biz__card--car::before, .biz__card--parking::before { background: radial-gradient(circle, #2f7bff, transparent 70%); }
.biz__card--bike::before, .biz__card--fire::before { background: radial-gradient(circle, #00d68f, transparent 70%); }

.biz__icon {
  width: 60px; height: 60px; display: grid; place-items: center;
  border-radius: 16px; margin-bottom: 22px;
}
.biz__icon svg { width: 32px; height: 32px; }
.biz__card--car .biz__icon, .biz__card--parking .biz__icon { background: rgba(47, 123, 255, .1); color: var(--blue); }
.biz__card--bike .biz__icon, .biz__card--fire .biz__icon { background: var(--brand-050); color: var(--brand); }

.biz__label { font-size: 13px; font-weight: 600; letter-spacing: .1em; color: var(--muted); text-transform: uppercase; }
.biz__title { margin-top: 8px; font-size: 24px; }
.biz__desc { margin-top: 14px; color: var(--text); font-size: 15.5px; }
.biz__list { margin-top: 20px; display: grid; gap: 10px; }
.biz__list li { position: relative; padding-left: 22px; color: var(--ink-2); font-size: 15px; }
.biz__list li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 10px; height: 10px; border-radius: 3px;
}
.biz__card--car .biz__list li::before, .biz__card--parking .biz__list li::before { background: rgba(47, 123, 255, .22); border: 2px solid var(--blue); }
.biz__card--bike .biz__list li::before, .biz__card--fire .biz__list li::before { background: rgba(0, 178, 107, .22); border: 2px solid var(--brand); }

.biz__modes { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.biz__modes span {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding: 0 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-soft);
  color: var(--ink-2); font-size: 12.5px; font-weight: 600;
}
.biz__modes span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
.biz__modes .is-on { background: var(--brand-050); border-color: transparent; color: var(--brand-600); }
.biz__modes .is-on::before { background: var(--brand); }

.biz__metrics { margin-top: 26px; padding-top: 20px; border-top: 1px dashed var(--line); display: flex; gap: 40px; }
.biz__metrics strong { display: block; color: var(--ink); font-size: 22px; }
.biz__metrics span { color: var(--muted); font-size: 13px; }

/* ---------------- 平台能力 ---------------- */
.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card {
  padding: 32px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #dce6f0; }
.card__icon {
  width: 48px; height: 48px; display: grid; place-items: center;
  border-radius: 13px; background: var(--brand-050); color: var(--brand-600); margin-bottom: 18px;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 18px; }
.card p { margin-top: 10px; color: var(--muted); font-size: 15px; }

/* ---------------- 核心优势 ---------------- */
.adv { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.adv__card {
  position: relative;
  padding: 34px 32px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.adv__card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #dce6f0; }
.adv__card::after {
  content: ""; position: absolute; right: -60px; top: -60px;
  width: 180px; height: 180px; border-radius: 50%; filter: blur(60px); opacity: .1;
  background: var(--brand);
}
.adv__card:nth-child(even)::after { background: var(--blue); }

.adv__head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.adv__icon {
  width: 46px; height: 46px; flex: none; display: grid; place-items: center;
  border-radius: 13px; background: var(--brand-050); color: var(--brand-600);
}
.adv__card:nth-child(even) .adv__icon { background: rgba(47, 123, 255, .1); color: var(--blue); }
.adv__icon svg { width: 24px; height: 24px; }
.adv__head h3 { font-size: 19px; }
.adv__head h3 > span { display: block; margin-top: 2px; color: var(--muted); font-size: 13px; }
.adv__desc { color: var(--text); font-size: 15.5px; }
.adv__pts { margin-top: 18px; display: grid; gap: 10px; }
.adv__pts li { position: relative; padding-left: 26px; color: var(--ink-2); font-size: 15px; }
.adv__pts li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--brand-050) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23009a5c' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12.5 4.2 4.2L19 7'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.adv__card:nth-child(even) .adv__pts li::before {
  background: rgba(47, 123, 255, .1) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232f7bff' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12.5 4.2 4.2L19 7'/%3E%3C/svg%3E") center / 11px no-repeat;
}

/* ---------------- 场景 ---------------- */
.scenes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.scene {
  position: relative;
  padding: 32px 28px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.scene::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--blue));
  transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease);
}
.scene:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.scene:hover::after { transform: scaleX(1); }
.scene__no { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--brand); }
.scene h3 { margin-top: 12px; font-size: 19px; }
.scene p { margin-top: 10px; color: var(--muted); font-size: 15px; }

/* ---------------- 流程 ---------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; position: relative; }
.steps li { position: relative; padding-top: 34px; }
.steps li::before {
  content: ""; position: absolute; top: 17px; left: 0; right: -22px; height: 1px; background: var(--line);
}
.steps li:last-child::before { display: none; }
.steps__no {
  position: absolute; top: 0; left: 0;
  width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 10px; background: var(--ink); color: #fff; font-size: 14px; font-weight: 700;
}
.steps h3 { margin-top: 20px; font-size: 18px; }
.steps p { margin-top: 10px; color: var(--muted); font-size: 15px; }

/* ---------------- 关于 ---------------- */
.about { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 56px; align-items: center; }
.about__copy .sec-tag { text-align: left; }
.about__copy .sec-title { text-align: left; }
.about__text { margin-top: 20px; color: var(--text); font-size: 16px; }
.about__list { margin-top: 26px; display: grid; gap: 14px; }
.about__list li { padding-left: 18px; position: relative; color: var(--ink-2); font-size: 15.5px; }
.about__list li::before {
  content: ""; position: absolute; left: 0; top: 12px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 3px var(--brand-050);
}
.about__list span {
  display: inline-block; min-width: 78px; margin-right: 10px;
  color: var(--brand-600); font-weight: 700;
}
.about__certs { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about__certs .cert:last-child:nth-child(odd) { grid-column: 1 / -1; }
.cert {
  padding: 24px 22px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow-sm);
}
.cert strong { display: block; color: var(--ink); font-size: 18px; }
.cert span { color: var(--muted); font-size: 13.5px; }

/* ---------------- 联系 ---------------- */
.contact {
  max-width: 860px; margin: 0 auto; text-align: center;
}
.contact__copy .sec-sub { margin-left: auto; margin-right: auto; }
.contact__info {
  margin-top: 42px;
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px;
}
.contact__info li {
  padding: 26px 24px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow-sm);
}
.contact__info span { display: block; color: var(--muted); font-size: 13.5px; }
.contact__info strong { display: block; margin-top: 6px; color: var(--ink); font-size: 17px; word-break: break-all; }

/* ---------------- 页脚 ---------------- */
.footer { background: var(--bg-dark); color: rgba(255, 255, 255, .62); padding: 70px 0 26px; }
.footer__inner { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.4fr); gap: 48px; }
.footer__brand p { margin-top: 18px; max-width: 380px; font-size: 14.5px; }
.footer__nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer__nav h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer__nav a { display: block; padding: 5px 0; font-size: 14.5px; transition: color .2s; }
.footer__nav a:hover { color: var(--brand); }
.footer__bottom {
  margin-top: 48px; padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255, 255, 255, .4);
}

/* ---------------- 返回顶部 ---------------- */
.totop {
  position: fixed; right: 24px; bottom: 28px; z-index: 90;
  width: 44px; height: 44px; display: grid; place-items: center;
  border-radius: 50%; background: #fff; color: var(--ink);
  border: 1px solid var(--line); box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .3s, transform .3s var(--ease), visibility .3s;
}
.totop.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.totop:hover { color: var(--brand-600); }

/* ---------------- 入场动画 ---------------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .hero__panel { max-width: 620px; min-height: 460px; }
  .biz { gap: 20px; }
  .adv { gap: 18px; }
  .adv__card { padding: 28px 24px; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .scenes { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

  .menu-btn { display: block; }
  .nav {
    position: fixed; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 10px 20px 22px;
    background: rgba(255, 255, 255, .97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(11, 18, 32, .12);
    transform: translateY(-12px);
    opacity: 0; visibility: hidden;
    transition: transform .28s var(--ease), opacity .28s, visibility .28s;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav > a {
    padding: 14px 6px;
    color: var(--ink-2) !important;
    border-bottom: 1px solid var(--line-2);
    border-radius: 0 !important;
    font-size: 16px;
  }
  .nav > a:hover { background: transparent !important; color: var(--brand-600) !important; }
  .nav__cta {
    margin: 16px 0 0;
    text-align: center;
    border-bottom: none !important;
    box-shadow: none !important;
  }

  .section { padding: 68px 0; }
  .sec-head { margin-bottom: 40px; }
  .hero { padding: calc(var(--header-h) + 56px) 0 72px; }
  .steps { grid-template-columns: 1fr 1fr; gap: 28px 22px; }
  .steps li::before { display: none; }
  .footer__inner { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 680px) {
  body { font-size: 15.5px; }
  .container { padding: 0 18px; }
  .biz { grid-template-columns: 1fr; }
  .biz__card { padding: 28px 22px; border-radius: 18px; }
  .biz__metrics { gap: 26px; }
  .adv { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: 1fr; }
  .scenes { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .about__certs { grid-template-columns: 1fr 1fr; }
  .contact__info { grid-template-columns: 1fr; }
  .btn { height: 48px; padding: 0 24px; font-size: 15px; }
  .hero__actions .btn { flex: 1 1 auto; min-width: 160px; }
  .footer__nav { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; }
  .totop { right: 14px; bottom: 16px; width: 40px; height: 40px; }
  .panel__kpis { grid-template-columns: 1fr; }
  .panel__modes { grid-template-columns: 1fr 1fr; }
  .hero__panel { min-height: 0; }
  .panel__body { padding: 16px; }
}