/* ==========================================================================
   城满电租车 · 官网样式系统
   定位：民用两轮电动车租赁服务（主推租电动车）
   视觉基调：精简 · 大气 · 商业化（大留白 / 强对比 / 克制配色）
   品牌主色：#4E4EFD（与城满电租车小程序视觉统一）
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 品牌色 */
  --brand: #4e4efd;
  --brand-dark: #3c3cd6;
  --brand-deep: #2b2bb0;
  --brand-light: #eeeefe;
  --brand-bg: #f2f2ff;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #6c6cff 0%, #4e4efd 48%, #3a3ad9 100%);
  --grad-hero: linear-gradient(165deg, #f7f8fd 0%, #eef0fc 42%, #ffffff 100%);
  --grad-dark: linear-gradient(150deg, #131328 0%, #1c1c3a 55%, #23234d 100%);

  /* 中性色 */
  --ink-1: #0d0d17;
  --ink-2: #333340;
  --ink-3: #6b6b7b;
  --ink-4: #9a9aab;
  --ink-5: #c8c8d4;

  --bg-page: #ffffff;
  --bg-soft: #f7f8fb;
  --bg-mute: #f1f2f7;
  --line: #e8e9f0;
  --line-soft: #f0f1f6;

  /* 功能色 */
  --green: #19be6b;
  --orange: #ff8f1f;
  --cyan: #17c3d6;

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 30px;
  --r-pill: 999px;

  /* 阴影 */
  --sh-sm: 0 2px 10px rgba(20, 20, 60, .05);
  --sh-md: 0 10px 30px -12px rgba(20, 20, 60, .14);
  --sh-lg: 0 26px 60px -24px rgba(20, 20, 60, .22);
  --sh-brand: 0 16px 38px -14px rgba(78, 78, 253, .48);

  /* 版心 */
  --wrap: 1240px;
  --wrap-narrow: 940px;

  /* 节奏 */
  --sec-y: 128px;
  --sec-y-sm: 88px;

  --ease: cubic-bezier(.22, .68, .32, 1);
}

/* ---------- 2. 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }

body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
               "Hiragino Sans GB", "Source Han Sans SC", system-ui, -apple-system,
               "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { margin: 0; color: var(--ink-1); font-weight: 700; line-height: 1.25; letter-spacing: -.02em; overflow-wrap: break-word; }
p { margin: 0; overflow-wrap: break-word; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
table { border-collapse: collapse; width: 100%; }

::selection { background: var(--brand); color: #fff; }

/* ---------- 3. 布局工具 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.wrap-narrow { width: 100%; max-width: var(--wrap-narrow); margin: 0 auto; padding: 0 28px; }

.section { padding: var(--sec-y) 0; }
.section--sm { padding: var(--sec-y-sm) 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--grad-dark); color: #fff; }
.section--dark h2, .section--dark h3 { color: #fff; }

.grid { display: grid; gap: 24px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.center { text-align: center; }
.mt-s { margin-top: 14px; } .mt-m { margin-top: 26px; } .mt-l { margin-top: 44px; }
.mb-s { margin-bottom: 14px; } .mb-m { margin-bottom: 26px; } .mb-l { margin-bottom: 48px; }

/* ---------- 4. 文本层级 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--brand);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px; background: var(--brand);
}
.section--dark .eyebrow { color: #9d9dff; }
.section--dark .eyebrow::before { background: #9d9dff; }

.h-display { font-size: clamp(38px, 5.6vw, 72px); line-height: 1.12; letter-spacing: -.035em; }
.h1 { font-size: clamp(32px, 4.2vw, 52px); letter-spacing: -.03em; }
.h2 { font-size: clamp(28px, 3.3vw, 42px); letter-spacing: -.028em; }
.h3 { font-size: clamp(20px, 2vw, 25px); letter-spacing: -.02em; }
.h4 { font-size: 18px; letter-spacing: -.01em; }

.lead { font-size: clamp(16px, 1.35vw, 19px); color: var(--ink-3); line-height: 1.85; }
.small { font-size: 14px; color: var(--ink-4); }
.mono-num { font-variant-numeric: tabular-nums; }

.section--dark .lead { color: rgba(255, 255, 255, .68); }

.text-brand { color: var(--brand); }

/* 小程序名称：主名 + 下方小字副标题（城满电租车 / 满电之家） */
.mp-name { display: inline-flex; flex-direction: column; line-height: 1.25; vertical-align: middle; text-align: left; }
.mp-name em { font-style: normal; font-size: .66em; font-weight: 500; opacity: .66; margin-top: 2px; letter-spacing: 0; white-space: nowrap; }
.has-mp { line-height: 1.55; }
.text-grad {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 50px; padding: 0 30px; border-radius: var(--r-pill);
  font-size: 15.5px; font-weight: 600; letter-spacing: .01em;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
              background-color .28s var(--ease), color .28s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn--primary { background: var(--brand); color: #fff; box-shadow: var(--sh-brand); }
.btn--primary:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 22px 44px -14px rgba(78, 78, 253, .58); }
.btn--ghost { background: #fff; color: var(--ink-1); border: 1.5px solid var(--line); }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn--dark { background: var(--ink-1); color: #fff; }
.btn--dark:hover { background: #000; transform: translateY(-2px); }
.btn--on-dark { background: rgba(255, 255, 255, .1); color: #fff; border: 1.5px solid rgba(255, 255, 255, .22); backdrop-filter: blur(6px); }
.btn--on-dark:hover { background: rgba(255, 255, 255, .2); transform: translateY(-2px); }
.btn--sm { height: 42px; padding: 0 22px; font-size: 14.5px; }
.btn--lg { height: 56px; padding: 0 36px; font-size: 16.5px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- 6. 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 72px; display: flex; align-items: center;
  background: rgba(255, 255, 255, .72);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}
.nav.is-stuck {
  border-bottom-color: var(--line-soft);
  box-shadow: 0 6px 26px -18px rgba(20, 20, 60, .28);
  background: rgba(255, 255, 255, .88);
}
.nav__inner { display: flex; align-items: center; gap: 40px; width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

.brand { display: flex; align-items: center; gap: 11px; flex: none; }
.brand__mark {
  width: 36px; height: 36px; border-radius: 11px; flex: none;
  background: var(--grad-brand); color: #fff;
  display: grid; place-items: center;
  font-size: 19px; font-weight: 800; letter-spacing: 0;
  box-shadow: 0 6px 16px -6px rgba(78, 78, 253, .6);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-size: 17px; font-weight: 800; color: var(--ink-1); letter-spacing: -.02em; }
.brand__sub { font-size: 10.5px; color: var(--ink-4); letter-spacing: .13em; font-weight: 600; }

.nav__menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__link {
  position: relative; padding: 9px 15px; border-radius: var(--r-pill);
  font-size: 15px; font-weight: 500; color: var(--ink-2);
  transition: color .22s var(--ease), background .22s var(--ease);
}
.nav__link:hover { color: var(--brand); background: var(--brand-light); }
.nav__link.is-active { color: var(--brand); font-weight: 650; }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 16px; height: 2.5px; border-radius: 2px; background: var(--brand);
}
.nav__cta { margin-left: 12px; }
.nav__toggle {
  display: none; width: 42px; height: 42px; border-radius: 12px;
  align-items: center; justify-content: center; margin-left: auto;
  border: 1px solid var(--line); background: #fff;
}
.nav__toggle span { display: block; width: 17px; height: 2px; background: var(--ink-1); border-radius: 2px; position: relative; }
.nav__toggle span::before, .nav__toggle span::after {
  content: ""; position: absolute; left: 0; width: 17px; height: 2px; background: var(--ink-1); border-radius: 2px;
  transition: transform .28s var(--ease), opacity .2s;
}
.nav__toggle span::before { top: -5.5px; } .nav__toggle span::after { top: 5.5px; }
.nav.is-open .nav__toggle span { background: transparent; }
.nav.is-open .nav__toggle span::before { transform: translateY(5.5px) rotate(45deg); }
.nav.is-open .nav__toggle span::after { transform: translateY(-5.5px) rotate(-45deg); }

/* ---------- 7. 首屏 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 168px 0 104px;
  background: var(--grad-hero);
}
.hero::before {
  content: ""; position: absolute; top: -320px; right: -180px;
  width: 760px; height: 760px; border-radius: 50%;
  background: radial-gradient(circle, rgba(78, 78, 253, .16) 0%, rgba(78, 78, 253, 0) 66%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; bottom: -260px; left: -200px;
  width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 195, 214, .12) 0%, rgba(23, 195, 214, 0) 68%);
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.02fr .98fr; gap: 64px; align-items: center; }
.hero__title { margin-bottom: 24px; }
.hero__desc { font-size: 18px; color: var(--ink-3); line-height: 1.85; max-width: 540px; margin-bottom: 34px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 16px 7px 8px; border-radius: var(--r-pill);
  background: #fff; border: 1px solid var(--line);
  font-size: 13.5px; font-weight: 600; color: var(--ink-2);
  box-shadow: var(--sh-sm); margin-bottom: 26px;
}
.hero__badge b {
  background: var(--brand-light); color: var(--brand);
  padding: 2px 10px; border-radius: var(--r-pill); font-size: 12px; font-weight: 700;
}

/* 首屏数据条 */
.hero__stats {
  display: flex; flex-wrap: wrap; gap: 40px;
  margin-top: 52px; padding-top: 34px; border-top: 1px solid var(--line);
}
.hero__stat b {
  display: block; font-size: 30px; font-weight: 800; color: var(--ink-1);
  letter-spacing: -.03em; line-height: 1.15; font-variant-numeric: tabular-nums;
}
.hero__stat b i { font-style: normal; font-size: 16px; font-weight: 700; color: var(--ink-3); margin-left: 3px; }
.hero__stat span { font-size: 13.5px; color: var(--ink-4); }

/* 首屏视觉 —— 车辆图 + 数据 */
.hero__visual { position: relative; padding-bottom: 26px; }
.hero__stage {
  position: relative; border-radius: var(--r-xl); overflow: hidden;
  background: linear-gradient(160deg, #ffffff 0%, #eef0fc 100%);
  border: 1px solid var(--line);
  box-shadow: var(--sh-lg);
  padding: 34px 34px 0;
}
.hero__stage::before {
  content: ""; position: absolute; top: -110px; right: -80px; width: 340px; height: 340px;
  border-radius: 50%; background: radial-gradient(circle, rgba(78,78,253,.16), transparent 68%);
}
.hero__stage-top {
  position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: flex-start;
}
.hero__stage-label { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-4); font-weight: 700; }
.hero__stage-name { font-size: 19px; font-weight: 750; color: var(--ink-1); margin-top: 6px; letter-spacing: -.02em; }
.hero__live {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 650; color: #12864b;
  background: rgba(25,190,107,.1); padding: 5px 12px; border-radius: var(--r-pill);
}
.hero__live::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: #19be6b; box-shadow: 0 0 0 4px rgba(25,190,107,.18);
}
.hero__bike {
  position: relative; z-index: 1;
  display: block; width: 100%; max-width: 520px; margin: -6px auto -14px;
  filter: drop-shadow(0 26px 30px rgba(30, 30, 90, .18));
}
.hero__stage-tags {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  padding: 18px 22px; margin: 0 -34px;
  background: rgba(255,255,255,.72); border-top: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.hero__tag b { display: block; font-size: 18px; font-weight: 800; color: var(--ink-1); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.hero__tag span { font-size: 11.5px; color: var(--ink-4); }

/* 合作方条 */
.logos { padding: 34px 0; border-bottom: 1px solid var(--line-soft); background: #fff; }
.logos__inner { display: flex; align-items: center; gap: 46px; flex-wrap: wrap; justify-content: center; }
.logos__label { font-size: 13px; color: var(--ink-4); font-weight: 600; letter-spacing: .05em; white-space: nowrap; }
.logos__item { font-size: 16.5px; font-weight: 750; color: var(--ink-5); letter-spacing: -.01em; transition: color .25s var(--ease); }
.logos__item:hover { color: var(--ink-3); }

/* ---------- 8. 区块标题 ---------- */
.head { max-width: 720px; margin-bottom: 60px; }
.head--center { margin-left: auto; margin-right: auto; text-align: center; }
.head--center .eyebrow { justify-content: center; }
.head__desc { margin-top: 18px; font-size: 16.5px; color: var(--ink-3); line-height: 1.85; }
.head--split { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; max-width: none; }

/* ---------- 9. 卡片 ---------- */
.card {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 32px;
  transition: transform .34s var(--ease), box-shadow .34s var(--ease), border-color .34s var(--ease);
}
.card:hover { transform: translateY(-5px); box-shadow: var(--sh-md); border-color: transparent; }
.card__icon {
  width: 52px; height: 52px; border-radius: 15px; margin-bottom: 22px;
  background: var(--brand-light); color: var(--brand);
  display: grid; place-items: center;
  transition: background .34s var(--ease), color .34s var(--ease);
}
.card__icon svg { width: 26px; height: 26px; }
.card:hover .card__icon { background: var(--brand); color: #fff; }
.card__title { font-size: 19px; margin-bottom: 10px; }
.card__desc { font-size: 14.5px; color: var(--ink-3); line-height: 1.8; }

.card--link { display: block; }
.card__more {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 20px;
  font-size: 14px; font-weight: 650; color: var(--brand);
}
.card__more svg { width: 15px; height: 15px; transition: transform .3s var(--ease); }
.card--link:hover .card__more svg { transform: translateX(4px); }

/* 业务布局大卡 */
.biz-card {
  position: relative; overflow: hidden; display: block;
  border-radius: var(--r-xl); padding: 40px 36px;
  min-height: 330px; display: flex; flex-direction: column;
  background: var(--bg-soft); border: 1px solid var(--line);
  transition: transform .38s var(--ease), box-shadow .38s var(--ease);
}
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); }
.biz-card--dark { background: var(--grad-dark); border-color: transparent; color: #fff; }
.biz-card--dark .biz-card__title { color: #fff; }
.biz-card--dark .biz-card__desc { color: rgba(255,255,255,.66); }
.biz-card--brand { background: var(--grad-brand); border-color: transparent; color: #fff; }
.biz-card--brand .biz-card__title { color: #fff; }
.biz-card--brand .biz-card__desc { color: rgba(255,255,255,.82); }
.biz-card__tag {
  align-self: flex-start; font-size: 11.5px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--brand); background: var(--brand-light);
  padding: 5px 12px; border-radius: var(--r-pill); margin-bottom: 22px;
}
.biz-card--dark .biz-card__tag, .biz-card--brand .biz-card__tag {
  background: rgba(255,255,255,.16); color: #fff;
}
.biz-card__title { font-size: 25px; margin-bottom: 12px; letter-spacing: -.025em; }
.biz-card__desc { font-size: 14.5px; color: var(--ink-3); line-height: 1.8; }
.biz-card__foot { margin-top: auto; padding-top: 28px; }
.biz-card__badge {
  position: absolute; right: -30px; bottom: -30px; width: 170px; height: 170px;
  border-radius: 50%; background: rgba(78, 78, 253, .07); pointer-events: none;
}
.biz-card--dark .biz-card__badge, .biz-card--brand .biz-card__badge { background: rgba(255,255,255,.09); }

/* 产品卡 */
.prod-card {
  display: block; border-radius: var(--r-lg); overflow: hidden;
  background: #fff; border: 1px solid var(--line);
  transition: transform .34s var(--ease), box-shadow .34s var(--ease);
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); }
.prod-card__pic {
  height: 190px; background: var(--bg-soft);
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.prod-card__pic::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 42%, rgba(78,78,253,.09), transparent 62%);
}
.prod-card__pic svg { width: 76px; height: 76px; color: var(--brand); opacity: .9; position: relative; z-index: 1; }
.prod-card__body { padding: 24px 26px 28px; }
.prod-card__title { font-size: 18px; margin-bottom: 7px; }
.prod-card__desc { font-size: 14px; color: var(--ink-3); line-height: 1.75; }

/* ---------- 10. 数据统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border-radius: var(--r-lg); overflow: hidden; }
.stat { background: #fff; padding: 40px 30px; text-align: center; }
.section--soft .stat { background: var(--bg-soft); }
.stat__num {
  font-size: clamp(30px, 3.4vw, 42px); font-weight: 800; color: var(--ink-1);
  letter-spacing: -.04em; line-height: 1.1; font-variant-numeric: tabular-nums;
  display: flex; align-items: baseline; justify-content: center; gap: 2px;
}
.stat__num i { font-style: normal; font-size: .48em; font-weight: 700; color: var(--ink-4); letter-spacing: 0; }
.stat__label { font-size: 14px; color: var(--ink-3); margin-top: 10px; }

.section--dark .stats { background: rgba(255,255,255,.1); }
.section--dark .stat { background: transparent; }
.section--dark .stat__num { color: #fff; }
.section--dark .stat__num i { color: rgba(255,255,255,.5); }
.section--dark .stat__label { color: rgba(255,255,255,.6); }

/* ---------- 11. 分栏内容 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split--wide { grid-template-columns: 1.15fr .85fr; }
.split__media {
  border-radius: var(--r-xl); overflow: hidden; background: var(--bg-soft);
  border: 1px solid var(--line); padding: 46px; position: relative;
}
.split__media--dark { background: var(--grad-dark); border-color: transparent; }

/* 特性列表 */
.feat { display: grid; gap: 22px; }
.feat__item { display: flex; gap: 18px; }
.feat__no {
  width: 40px; height: 40px; border-radius: 12px; flex: none;
  background: var(--brand-light); color: var(--brand);
  display: grid; place-items: center;
  font-size: 15px; font-weight: 800; font-variant-numeric: tabular-nums;
}
.feat__body h4 { font-size: 16.5px; margin-bottom: 5px; }
.feat__body p { font-size: 14.5px; color: var(--ink-3); line-height: 1.78; }
.section--dark .feat__no { background: rgba(255,255,255,.12); color: #fff; }
.section--dark .feat__body p { color: rgba(255,255,255,.62); }

/* 勾选列表 */
.checks { display: grid; gap: 13px; }
.checks li { display: flex; gap: 11px; align-items: flex-start; font-size: 15px; color: var(--ink-2); }
.checks svg { width: 19px; height: 19px; flex: none; color: var(--brand); margin-top: 4px; }
.section--dark .checks li { color: rgba(255,255,255,.78); }
.section--dark .checks svg { color: #9d9dff; }

/* ---------- 12. 规格表 ---------- */
.spec { border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: #fff; }
.spec__row { display: grid; grid-template-columns: 168px 1fr; border-bottom: 1px solid var(--line-soft); }
.spec__row:last-child { border-bottom: 0; }
.spec__k { padding: 18px 24px; background: var(--bg-soft); font-size: 14px; font-weight: 650; color: var(--ink-2); }
.spec__v { padding: 18px 24px; font-size: 14.5px; color: var(--ink-2); }

.data-table { border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: #fff; }
.data-table th, .data-table td { padding: 16px 22px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line-soft); }
.data-table th { background: var(--bg-soft); font-weight: 700; color: var(--ink-1); font-size: 13.5px; letter-spacing: .02em; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: var(--brand-bg); }

/* ---------- 13. 时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(180deg, var(--brand), rgba(78,78,253,.12));
  border-radius: 2px;
}
.tl-year { position: relative; margin-bottom: 40px; }
.tl-year:last-child { margin-bottom: 0; }
.tl-year::before {
  content: ""; position: absolute; left: -30px; top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: #fff; border: 2.5px solid var(--brand);
  box-shadow: 0 0 0 4px rgba(78, 78, 253, .12);
}
.tl-year__num { font-size: 21px; font-weight: 800; color: var(--brand); letter-spacing: -.01em; margin-bottom: 14px; font-variant-numeric: tabular-nums; }
.tl-year__list { display: grid; gap: 11px; }
.tl-year__list li { position: relative; padding-left: 17px; font-size: 15px; color: var(--ink-2); line-height: 1.7; }
.tl-year__list li::before {
  content: ""; position: absolute; left: 0; top: 11px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--ink-5);
}

/* ---------- 14. 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 30px 26px;
  transition: transform .34s var(--ease), box-shadow .34s var(--ease);
}
.step:hover { transform: translateY(-5px); box-shadow: var(--sh-md); }
.step__no {
  width: 38px; height: 38px; border-radius: 12px; margin-bottom: 18px;
  background: var(--grad-brand); color: #fff;
  display: grid; place-items: center; font-size: 15px; font-weight: 800;
  box-shadow: 0 8px 18px -8px rgba(78,78,253,.6);
}
.step h4 { font-size: 16.5px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--ink-3); line-height: 1.75; }

/* ---------- 15. 页头（内页） ---------- */
.page-head {
  position: relative; overflow: hidden;
  padding: 158px 0 78px; background: var(--grad-hero);
  border-bottom: 1px solid var(--line-soft);
}
.page-head::before {
  content: ""; position: absolute; top: -280px; right: -140px; width: 640px; height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(78,78,253,.14), transparent 68%);
}
.page-head__inner { position: relative; z-index: 1; max-width: 780px; }
.page-head__desc { margin-top: 20px; font-size: 17px; color: var(--ink-3); line-height: 1.85; max-width: 660px; }

.crumb { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: var(--ink-4); margin-bottom: 22px; }
.crumb a:hover { color: var(--brand); }
.crumb span { color: var(--ink-5); }

/* ---------- 16. 锚点标签页 ---------- */
.tabs {
  position: sticky; top: 72px; z-index: 50;
  background: rgba(255,255,255,.86); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.tabs__inner { display: flex; gap: 6px; overflow-x: auto; padding: 12px 28px; max-width: var(--wrap); margin: 0 auto; scrollbar-width: none; }
.tabs__inner::-webkit-scrollbar { display: none; }
.tab {
  padding: 9px 18px; border-radius: var(--r-pill); font-size: 14.5px; font-weight: 550;
  color: var(--ink-3); white-space: nowrap; transition: all .24s var(--ease);
}
.tab:hover { background: var(--brand-light); color: var(--brand); }
.tab.is-active { background: var(--brand); color: #fff; font-weight: 650; }

/* ---------- 17. CTA 区 ---------- */
.cta {
  position: relative; overflow: hidden; border-radius: var(--r-xl);
  background: var(--grad-dark); color: #fff; padding: 68px 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 48px;
}
.cta::before {
  content: ""; position: absolute; top: -140px; right: -80px; width: 440px; height: 440px;
  border-radius: 50%; background: radial-gradient(circle, rgba(110,110,255,.42), transparent 66%);
}
.cta__inner { position: relative; z-index: 1; max-width: 620px; }
.cta h2 { color: #fff; margin-bottom: 14px; }
.cta p { color: rgba(255,255,255,.68); font-size: 16px; line-height: 1.8; }
.cta__actions { position: relative; z-index: 1; display: flex; gap: 14px; flex-wrap: wrap; flex: none; }

/* ---------- 17b. 小程序扫码 ---------- */
.qr-card {
  display: flex; align-items: center; gap: 26px;
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-xl); padding: 26px 30px;
  box-shadow: var(--sh-md);
}
.qr-card__img {
  position: relative; width: 132px; height: 132px; flex: none;
  border-radius: var(--r-md); overflow: hidden;
  background: #fff; border: 1px solid var(--line);
  display: grid; place-items: center;
}
.qr-card__img img { width: 100%; height: 100%; object-fit: contain; padding: 8px; }
.qr-card__ph {
  width: 100%; height: 100%; display: grid; place-items: center; gap: 6px;
  background: var(--bg-mute); color: var(--ink-4); text-align: center; padding: 10px;
}
.qr-card__ph svg { width: 30px; height: 30px; }
.qr-card__ph span { font-size: 10.5px; line-height: 1.45; }
.qr-card__body h4 { font-size: 17px; margin-bottom: 6px; }
.qr-card__body p { font-size: 13.5px; color: var(--ink-3); line-height: 1.75; }
.qr-card__badge {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 10px;
  font-size: 12.5px; font-weight: 650; color: var(--brand);
  background: var(--brand-light); padding: 5px 12px; border-radius: var(--r-pill);
}

/* 深色底上的扫码卡 */
.qr-card--dark { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.14); box-shadow: none; }
.qr-card--dark .qr-card__body h4 { color: #fff; }
.qr-card--dark .qr-card__body p { color: rgba(255,255,255,.62); }
.qr-card--dark .qr-card__img { border-color: rgba(255,255,255,.16); background: #fff; }
.qr-card--dark .qr-card__badge { background: rgba(255,255,255,.14); color: #fff; }

/* 首页大号扫码区 */
.qr-hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
.qr-hero__steps { display: grid; gap: 16px; margin-top: 30px; }
.qr-hero__step { display: flex; gap: 15px; align-items: flex-start; }
.qr-hero__step-no {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  background: var(--brand); color: #fff;
  display: grid; place-items: center; font-size: 13.5px; font-weight: 800;
}
.qr-hero__step b { display: block; font-size: 15.5px; color: var(--ink-1); margin-bottom: 3px; }
.qr-hero__step span { font-size: 14px; color: var(--ink-3); line-height: 1.7; }

.qr-frame {
  position: relative; border-radius: var(--r-xl); padding: 34px;
  background: var(--grad-dark); color: #fff;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  box-shadow: var(--sh-lg); overflow: hidden;
}
.qr-frame::before {
  content: ""; position: absolute; top: -120px; right: -90px; width: 320px; height: 320px;
  border-radius: 50%; background: radial-gradient(circle, rgba(110,110,255,.42), transparent 66%);
}
.qr-frame__inner {
  position: relative; z-index: 1; background: #fff; border-radius: var(--r-lg);
  padding: 18px; margin-bottom: 22px; box-shadow: 0 18px 40px -18px rgba(0,0,0,.5);
}
.qr-frame__inner img { width: 200px; height: 200px; object-fit: contain; display: block; }
.qr-frame__ph {
  width: 200px; height: 200px; display: grid; place-items: center; gap: 10px;
  background: var(--bg-mute); border-radius: var(--r-md); color: var(--ink-4);
  text-align: center; padding: 20px;
}
.qr-frame__ph svg { width: 44px; height: 44px; }
.qr-frame__ph span { font-size: 12px; line-height: 1.5; font-weight: 600; }
.qr-frame h4 { position: relative; z-index: 1; font-size: 20px; color: #fff; margin-bottom: 8px; }
.qr-frame p { position: relative; z-index: 1; font-size: 13.5px; color: rgba(255,255,255,.62); line-height: 1.75; max-width: 320px; }

/* 右侧浮动扫码按钮 */
.qr-float {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  display: flex; flex-direction: column; align-items: flex-end; gap: 12px;
}
.qr-float__btn {
  display: inline-flex; align-items: center; gap: 9px;
  height: 52px; padding: 0 22px; border-radius: var(--r-pill);
  background: var(--brand); color: #fff; font-size: 15px; font-weight: 650;
  box-shadow: var(--sh-brand);
  transition: transform .28s var(--ease), background .28s var(--ease), box-shadow .28s var(--ease);
}
.qr-float__btn:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 22px 44px -14px rgba(78,78,253,.6); }
.qr-float__btn svg { width: 19px; height: 19px; }
.qr-float__panel {
  order: -1;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 18px; box-shadow: var(--sh-lg); text-align: center;
  transform-origin: bottom right;
  transform: translateY(8px) scale(.96); opacity: 0; pointer-events: none;
  transition: opacity .26s var(--ease), transform .26s var(--ease);
}
.qr-float.is-open .qr-float__panel { transform: none; opacity: 1; pointer-events: auto; }
.qr-float__panel img { width: 152px; height: 152px; object-fit: contain; display: block; margin: 0 auto 10px; }
.qr-float__ph {
  width: 152px; height: 152px; display: grid; place-items: center; gap: 8px;
  background: var(--bg-mute); border-radius: var(--r-md); color: var(--ink-4);
  text-align: center; padding: 14px; margin: 0 auto 10px;
}
.qr-float__ph svg { width: 32px; height: 32px; }
.qr-float__ph span { font-size: 11px; line-height: 1.45; font-weight: 600; }
.qr-float__panel b { display: block; font-size: 14px; color: var(--ink-1); margin-bottom: 3px; }
.qr-float__panel span { font-size: 12px; color: var(--ink-4); }

/* ---------- 17c. 服务城市地图 ---------- */
.map-wrap {
  position: relative; border-radius: var(--r-xl); overflow: hidden;
  background: var(--grad-dark); padding: 54px 48px;
  box-shadow: var(--sh-lg);
}
.map-wrap::before {
  content: ""; position: absolute; top: -160px; right: -120px; width: 460px; height: 460px;
  border-radius: 50%; background: radial-gradient(circle, rgba(110,110,255,.36), transparent 66%);
}
.map-head { position: relative; z-index: 1; margin-bottom: 38px; }
.map-head h3 { color: #fff; font-size: clamp(22px, 2.4vw, 30px); margin-bottom: 12px; letter-spacing: -.025em; }
.map-head p { color: rgba(255,255,255,.62); font-size: 15px; line-height: 1.8; max-width: 560px; }

/* 抽象地图：点阵 + 光点 */
.map-canvas {
  position: relative; z-index: 1;
  height: 700px; border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 22% 38%, rgba(110,110,255,.22), transparent 42%),
    radial-gradient(circle at 68% 62%, rgba(23,195,214,.16), transparent 46%),
    rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.1);
  overflow: hidden;
}
/* 点阵网格 */
.map-canvas::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.16) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse at 50% 50%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, #000 30%, transparent 78%);
}
/* 连接线 */
.map-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.map-lines line, .map-lines path {
  stroke: rgba(157,157,255,.3); stroke-width: 1; fill: none;
  stroke-dasharray: 4 6;
  animation: dash 24s linear infinite;
}
@keyframes dash { to { stroke-dashoffset: -200; } }

/* 城市光点 */
/* 圆点本体就是定位元素，标签绝对定位挂在旁边——
   这样圆点精确落在经纬度投影出来的位置上，不会被标签宽度带偏 */
.map-dot {
  position: absolute; width: 8px; height: 8px;
  transform: translate(-50%, -50%);
}
.map-dot::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: #9d9dff; box-shadow: 0 0 0 5px rgba(157,157,255,.16);
}
.map-dot--major { width: 12px; height: 12px; }
.map-dot--major::before { background: #fff; box-shadow: 0 0 0 7px rgba(157,157,255,.22); }
.map-dot::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 8px; height: 8px;
  border-radius: 50%; transform: translate(-50%, -50%);
  background: rgba(157,157,255,.5); animation: ping 3.4s ease-out infinite;
  display: none;   /* 光晕只留给重点城市：20 个点全闪会太吵 */
}
.map-dot--major::after { display: block; }
@keyframes ping {
  0% { transform: translate(-50%,-50%) scale(1); opacity: .7; }
  70%, 100% { transform: translate(-50%,-50%) scale(5.5); opacity: 0; }
}
.map-dot span {
  position: absolute; white-space: nowrap; line-height: 1;
  font-size: 11.5px; color: rgba(255,255,255,.68); font-weight: 600;
}
.map-dot--major span { color: #fff; font-size: 12.5px; font-weight: 750; }

/* 标签相对圆点的方位（脚本按避让结果分配） */
.map-dot--r  span { left: 100%;  top: 50%; margin-left: 9px;  transform: translateY(-50%); }
.map-dot--l  span { right: 100%; top: 50%; margin-right: 9px; transform: translateY(-50%); }
.map-dot--tr span { left: 100%;  bottom: 100%; margin-left: 4px;  margin-bottom: 9px; }
.map-dot--br span { left: 100%;  top: 100%;    margin-left: 4px;  margin-top: 9px; }
.map-dot--tl span { right: 100%; bottom: 100%; margin-right: 4px; margin-bottom: 9px; }
.map-dot--bl span { right: 100%; top: 100%;    margin-right: 4px; margin-top: 9px; }

/* 仅供读屏/检索，不在图上显示 */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.map-foot {
  position: relative; z-index: 1; margin-top: 30px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.map-foot__legend { display: flex; gap: 22px; flex-wrap: wrap; }
.map-legend { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,.6); }
.map-legend i {
  width: 9px; height: 9px; border-radius: 50%; background: #9d9dff; flex: none;
  display: block;
}
.map-legend--major i { width: 12px; height: 12px; background: #fff; box-shadow: 0 0 0 4px rgba(157,157,255,.2); }

/* 城市标签云 */
.city-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.city-tag {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px; border-radius: var(--r-pill);
  background: #fff; border: 1px solid var(--line);
  font-size: 14px; font-weight: 600; color: var(--ink-2);
  transition: all .24s var(--ease);
}
.city-tag:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); box-shadow: var(--sh-sm); }
.city-tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); flex: none;
}
.city-tag--hot { background: var(--brand-light); border-color: transparent; color: var(--brand); }
.city-tag--hot::before { background: var(--brand); box-shadow: 0 0 0 3px rgba(78,78,253,.18); }

/* ---------- 18. 页脚 ---------- */
.foot { background: #0b0b14; color: rgba(255,255,255,.62); padding: 78px 0 0; }
.foot__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 56px; }
.foot .brand__name { color: #fff; }
.foot .brand__sub { color: rgba(255,255,255,.4); }
.foot__about { margin-top: 22px; font-size: 14px; line-height: 1.85; color: rgba(255,255,255,.5); max-width: 330px; }
.foot__title { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 20px; letter-spacing: .01em; }
.foot__list { display: grid; gap: 12px; }
.foot__list a, .foot__list li { font-size: 14px; color: rgba(255,255,255,.58); transition: color .22s var(--ease); }
.foot__list a:hover { color: #fff; }
.foot__contact li { display: flex; gap: 10px; align-items: flex-start; }
.foot__contact svg { width: 16px; height: 16px; flex: none; margin-top: 5px; color: rgba(255,255,255,.35); }
.foot__bottom {
  border-top: 1px solid rgba(255,255,255,.09);
  padding: 26px 0 34px; display: flex; justify-content: space-between; align-items: center;
  gap: 20px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,.4);
}
.foot__bottom a { color: rgba(255,255,255,.4); }
.foot__bottom a:hover { color: #fff; }

/* ---------- 19. 滚动动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }
.reveal[data-d="5"] { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .hero__float { animation: none; }
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1100px) {
  :root { --sec-y: 92px; --sec-y-sm: 68px; }
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { grid-template-columns: 1fr; gap: 52px; }
  .hero__desc { max-width: none; }
  .split, .split--wide { grid-template-columns: 1fr; gap: 44px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .foot__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .cta { flex-direction: column; align-items: flex-start; padding: 52px 40px; }
}

@media (max-width: 860px) {
  .nav__inner { gap: 16px; }
  .nav__menu {
    position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 16px 20px 24px; margin: 0;
    box-shadow: 0 22px 40px -24px rgba(20,20,60,.3);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .28s var(--ease), transform .28s var(--ease);
    max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .nav.is-open .nav__menu { transform: none; opacity: 1; pointer-events: auto; }
  .nav__link { padding: 14px 16px; font-size: 16px; border-radius: var(--r-md); }
  .nav__link.is-active::after { display: none; }
  .nav__link.is-active { background: var(--brand-light); }
  .nav__cta { margin: 12px 0 0; }
  .nav__cta .btn { width: 100%; }
  .nav__toggle { display: flex; }

  .g2, .g3, .g4 { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: 1fr; }
  .spec__row { grid-template-columns: 110px 1fr; }
  .spec__k, .spec__v { padding: 14px 16px; font-size: 13.5px; }
  .data-table th, .data-table td { padding: 13px 15px; font-size: 13.5px; }
  .hero { padding: 132px 0 76px; }
  .page-head { padding: 124px 0 60px; }
  .hero__float { left: 0; bottom: -18px; max-width: none; }
  .hero__stats { gap: 26px 34px; }
  .head--split { flex-direction: column; align-items: flex-start; gap: 24px; }
  .split__media { padding: 30px; }
  .cta { padding: 42px 28px; }
  .foot__grid { grid-template-columns: 1fr; gap: 34px; }
  .foot__bottom { flex-direction: column; align-items: flex-start; }
  .wrap, .wrap-narrow { padding: 0 20px; }
  .tabs__inner { padding: 10px 20px; }

  .qr-hero { grid-template-columns: 1fr; gap: 40px; }
  .qr-card { flex-direction: column; align-items: flex-start; text-align: left; }
  .qr-float { right: 14px; bottom: 14px; }
  .qr-float__panel img, .qr-float__ph { width: 130px; height: 130px; }

  .map-wrap { padding: 40px 26px; }
  .map-canvas { height: 480px; }
  .map-dot span { font-size: 10.5px; }
  .map-dot--major span { font-size: 11.5px; }
  .map-foot { flex-direction: column; align-items: flex-start; gap: 18px; }
}

@media (max-width: 520px) {
  .stats { grid-template-columns: 1fr; }
  .hero__stage-tags { grid-template-columns: 1fr; gap: 12px; }
  .hero__battery-num { font-size: 62px; }
  .btn { width: 100%; }
  .btn-row { width: 100%; }
  .cta__actions { width: 100%; }
  .qr-float__btn { height: 48px; padding: 0 18px; font-size: 14px; }
  .qr-frame { padding: 26px 20px; }
  .qr-frame__inner img, .qr-frame__ph { width: 160px; height: 160px; }
  .map-wrap { padding: 32px 20px; }
  .map-canvas { height: 480px; }
  .map-dot span { display: none; }
  .map-dot--major span { display: block; font-size: 11.5px; }
}