/* ==========================================================================
   仝辉下载站 · 全站样式
   风格：科技蓝 / 玻璃拟态 / 单页长滚动
   目录：01 变量  02 基础  03 通用组件  04 导航  05 首屏  06 能力条
        07 产品介绍  08 核心功能  09 界面预览  10 电商小程序  11 下载中心
        12 常见问题  13 联系我们  14 页脚  15 浮层  16 动效  17 响应式
   ========================================================================== */

/* ---------- 01 变量 ---------- */
:root {
  --brand-50: #EEF4FF;
  --brand-100: #DCE8FF;
  --brand-200: #BDD4FF;
  --brand-400: #4F8DFD;
  --brand-500: #1B64EB;
  --brand-600: #1552C7;
  --brand-700: #0E3C99;
  --navy-700: #0B2A66;
  --navy-800: #0A1E4A;
  --navy-900: #071733;
  --cyan: #22D3EE;
  --violet: #7C5CFF;
  --mint: #10B981;
  --amber: #F59E0B;
  --rose: #F43F5E;

  --ink-900: #0A1428;
  --ink-800: #142239;
  --ink-700: #26364F;
  --ink-500: #4E5F7C;
  --ink-400: #71819C;
  --line: #E3EAF6;
  --line-soft: #EEF3FB;
  --bg: #F5F8FE;
  --bg-alt: #EDF3FD;
  --white: #FFFFFF;

  --grad: linear-gradient(120deg, #1B64EB 0%, #4F8DFD 52%, #22D3EE 118%);
  --grad-btn: linear-gradient(135deg, #2C74F5 0%, #1B64EB 60%, #1552C7 100%);
  --grad-text: linear-gradient(96deg, #1B64EB 0%, #4F8DFD 45%, #22D3EE 100%);
  --grad-dark: linear-gradient(150deg, #071733 0%, #0B2A66 48%, #123C8F 100%);
  --grad-card: linear-gradient(160deg, #FFFFFF 0%, #F7FAFF 100%);

  --r-xs: 8px;
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-xl: 34px;

  --sh-xs: 0 1px 2px rgba(12, 34, 78, .06);
  --sh-sm: 0 4px 14px rgba(12, 34, 78, .07);
  --sh-md: 0 14px 36px rgba(12, 34, 78, .10);
  --sh-lg: 0 30px 70px rgba(12, 34, 78, .15);
  --sh-brand: 0 16px 38px rgba(27, 100, 235, .30);

  --container: 1200px;
  --header-h: 74px;
  --ease: cubic-bezier(.22, .68, .32, 1);
}

/* ---------- 02 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
               "Source Han Sans SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { margin: 0; color: var(--ink-900); font-weight: 800; line-height: 1.24; letter-spacing: -.01em; }
p { margin: 0; }
svg { display: block; }
:focus-visible { outline: 3px solid rgba(79, 141, 253, .55); outline-offset: 3px; border-radius: 6px; }

::selection { background: rgba(27, 100, 235, .16); }

/* 滚动条（桌面端） */
@media (min-width: 1024px) {
  ::-webkit-scrollbar { width: 10px; height: 10px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb { background: #C6D6EE; border: 3px solid var(--bg); border-radius: 99px; }
  ::-webkit-scrollbar-thumb:hover { background: #A9C0E2; }
}

/* ---------- 03 通用组件 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { position: relative; padding: 104px 0; }
.section--alt { background:
  radial-gradient(900px 420px at 88% -10%, rgba(79, 141, 253, .10), transparent 62%),
  radial-gradient(700px 380px at 4% 106%, rgba(34, 211, 238, .10), transparent 60%),
  var(--bg-alt); }
.section--tight { padding: 76px 0; }

.section-head { max-width: 760px; margin: 0 auto 58px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 14px;
  margin-bottom: 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--brand-600);
  background: var(--white);
  border: 1px solid var(--brand-100);
  border-radius: 99px;
  box-shadow: var(--sh-xs);
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 0 4px rgba(27, 100, 235, .12);
}

.section-title { font-size: clamp(26px, 3.4vw, 42px); }
.section-title .hl {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-lead {
  margin-top: 18px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink-500);
}

/* 按钮 */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 26px;
  font-size: 15.5px;
  font-weight: 700;
  white-space: nowrap;
  border-radius: 999px;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), background .28s, color .28s, border-color .28s;
}
.btn svg { width: 19px; height: 19px; flex: 0 0 auto; }
.btn--primary {
  color: #fff;
  background: var(--grad-btn);
  box-shadow: var(--sh-brand);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 22px 46px rgba(27, 100, 235, .38); }
.btn--ghost {
  color: var(--ink-900);
  background: rgba(255, 255, 255, .86);
  border: 1px solid var(--line);
  box-shadow: var(--sh-sm);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { transform: translateY(-3px); border-color: var(--brand-200); color: var(--brand-600); box-shadow: var(--sh-md); }
.btn--outline {
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, .34);
  background: rgba(255, 255, 255, .07);
  backdrop-filter: blur(10px);
}
.btn--outline:hover { transform: translateY(-3px); background: rgba(255, 255, 255, .16); border-color: rgba(255, 255, 255, .6); }
.btn--sm { height: 44px; padding: 0 20px; font-size: 14.5px; }
.btn--block { width: 100%; }

/* 卡片 */
.card {
  position: relative;
  background: var(--grad-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  transition: transform .34s var(--ease), box-shadow .34s var(--ease), border-color .34s;
}
.card:hover { transform: translateY(-6px); border-color: var(--brand-200); box-shadow: var(--sh-md); }

/* 占位（配置留空时） */
.is-blank {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 1px 10px;
  font-size: .92em;
  font-weight: 600;
  color: var(--ink-400);
  background: var(--line-soft);
  border: 1px dashed #C9D6EA;
  border-radius: 999px;
}
.is-blank::before { content: "待配置"; font-size: .84em; letter-spacing: .04em; }

/* 图标底座 */
.ico {
  display: grid;
  place-items: center;
  width: 52px; height: 52px;
  flex: 0 0 auto;
  color: #fff;
  border-radius: 15px;
  background: var(--grad);
  box-shadow: 0 10px 22px rgba(27, 100, 235, .26);
}
.ico svg { width: 25px; height: 25px; }
.ico--cyan { background: linear-gradient(135deg, #22D3EE, #0EA5E9); box-shadow: 0 10px 22px rgba(34, 211, 238, .3); }
.ico--violet { background: linear-gradient(135deg, #8B5CF6, #6366F1); box-shadow: 0 10px 22px rgba(124, 92, 255, .3); }
.ico--mint { background: linear-gradient(135deg, #34D399, #10B981); box-shadow: 0 10px 22px rgba(16, 185, 129, .28); }
.ico--amber { background: linear-gradient(135deg, #FBBF24, #F59E0B); box-shadow: 0 10px 22px rgba(245, 158, 11, .3); }
.ico--rose { background: linear-gradient(135deg, #FB7185, #F43F5E); box-shadow: 0 10px 22px rgba(244, 63, 94, .26); }
.ico--navy { background: linear-gradient(135deg, #2C74F5, #0B2A66); box-shadow: 0 10px 22px rgba(11, 42, 102, .3); }

/* ---------- 04 导航 ---------- */
.progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 120;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #22D3EE, #4F8DFD 45%, #7C5CFF);
  transition: width .12s linear;
}

.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 110;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background .35s var(--ease), box-shadow .35s var(--ease), border-color .35s, backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}
.header.is-stuck {
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom-color: var(--line);
  box-shadow: 0 10px 30px rgba(12, 34, 78, .07);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand__logo {
  width: 42px; height: 42px;
  border-radius: 13px;
  box-shadow: 0 8px 20px rgba(12, 34, 78, .18);
  background: #fff;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand__name { font-size: 18px; font-weight: 800; color: #fff; letter-spacing: .01em; transition: color .35s; }
.brand__sub { font-size: 11.5px; font-weight: 600; letter-spacing: .1em; color: rgba(255, 255, 255, .62); transition: color .35s; }
.header.is-stuck .brand__name { color: var(--ink-900); }
.header.is-stuck .brand__sub { color: var(--ink-400); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 15px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, .82);
  border-radius: 999px;
  transition: color .25s, background .25s;
}
.nav__link:hover { color: #fff; background: rgba(255, 255, 255, .12); }
.nav__link.is-active { color: #fff; background: rgba(255, 255, 255, .16); }
.header.is-stuck .nav__link { color: var(--ink-500); }
.header.is-stuck .nav__link:hover { color: var(--brand-600); background: var(--brand-50); }
.header.is-stuck .nav__link.is-active { color: var(--brand-600); background: var(--brand-50); }

.header__cta { display: flex; align-items: center; gap: 12px; }
.header__cta .btn { height: 44px; padding: 0 22px; font-size: 14.5px; }

.burger {
  display: none;
  width: 44px; height: 44px;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .2);
}
.header.is-stuck .burger { color: var(--ink-900); background: var(--brand-50); border-color: var(--brand-100); }
.burger svg { width: 22px; height: 22px; }

.drawer {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: none;
}
.drawer.is-open { display: block; }
.drawer__mask {
  position: absolute;
  inset: 0;
  background: rgba(7, 23, 51, .5);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity .3s;
}
.drawer.is-open .drawer__mask { opacity: 1; }
.drawer__panel {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(340px, 86vw);
  display: flex;
  flex-direction: column;
  padding: 22px 22px 34px;
  background: #fff;
  box-shadow: -20px 0 60px rgba(7, 23, 51, .22);
  transform: translateX(100%);
  transition: transform .42s var(--ease);
  overflow-y: auto;
}
.drawer.is-open .drawer__panel { transform: none; }
.drawer__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.drawer__close {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--line-soft);
  color: var(--ink-700);
}
.drawer__close svg { width: 20px; height: 20px; }
.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-800);
  border-bottom: 1px solid var(--line-soft);
}
.drawer__link span { font-size: 12px; font-weight: 600; color: var(--ink-400); }
.drawer__foot { margin-top: auto; padding-top: 22px; display: grid; gap: 10px; }

/* ---------- 05 首屏 ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 74px) 0 96px;
  color: #fff;
  background: var(--grad-dark);
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(1200px 620px at 50% 0%, #000 12%, transparent 82%);
  -webkit-mask-image: radial-gradient(1200px 620px at 50% 0%, #000 12%, transparent 82%);
  z-index: -1;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 140px;
  background: linear-gradient(180deg, transparent, var(--bg));
  z-index: -1;
}
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(74px);
  opacity: .6;
  z-index: -2;
  animation: orb 18s ease-in-out infinite;
}
.hero__orb--a { width: 460px; height: 460px; top: -140px; left: -110px; background: #2C74F5; }
.hero__orb--b { width: 380px; height: 380px; top: 40px; right: -80px; background: #22D3EE; opacity: .38; animation-delay: -6s; }
.hero__orb--c { width: 420px; height: 420px; bottom: -190px; left: 38%; background: #7C5CFF; opacity: .34; animation-delay: -11s; }

.hero__grid {
  display: grid;
  grid-template-columns: 1.06fr .94fr;
  align-items: center;
  gap: 56px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 36px;
  padding: 0 16px;
  margin-bottom: 24px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .02em;
  color: #DCEAFF;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  backdrop-filter: blur(8px);
}
.hero__badge b {
  padding: 2px 9px;
  font-size: 12px;
  color: #06214F;
  background: linear-gradient(135deg, #7DD3FC, #22D3EE);
  border-radius: 999px;
}
.hero__title {
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.14;
  color: #fff;
  letter-spacing: -.02em;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(100deg, #8FD3FF 0%, #4F8DFD 38%, #22D3EE 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__desc {
  margin-top: 22px;
  max-width: 560px;
  font-size: 17px;
  line-height: 1.95;
  color: rgba(232, 240, 255, .78);
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__actions .btn { height: 56px; padding: 0 28px; }

.hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.fact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: rgba(226, 238, 255, .82);
}
.fact svg { width: 17px; height: 17px; color: #4FE0C1; flex: 0 0 auto; }

/* 手机模型 */
.hero__visual { position: relative; display: grid; place-items: center; min-height: 560px; }
.phone {
  position: relative;
  width: 292px;
  padding: 11px;
  border-radius: 46px;
  background: linear-gradient(160deg, #1B2A4A, #060D1F);
  box-shadow: 0 50px 90px rgba(3, 12, 32, .55), 0 0 0 1px rgba(255, 255, 255, .14) inset;
  animation: float 7s ease-in-out infinite;
}
.phone::after {
  content: "";
  position: absolute;
  top: 18px; left: 50%;
  transform: translateX(-50%);
  width: 96px; height: 22px;
  background: #060D1F;
  border-radius: 99px;
  z-index: 3;
}
.phone__screen {
  position: relative;
  aspect-ratio: 9 / 19.4;
  border-radius: 36px;
  overflow: hidden;
  background: #fff;
}
.phone__screen img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top center;
}
.phone__glow {
  position: absolute;
  inset: -30px;
  z-index: -1;
  border-radius: 70px;
  background: radial-gradient(closest-side, rgba(79, 141, 253, .55), transparent 72%);
  filter: blur(26px);
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 17px;
  border-radius: 17px;
  background: rgba(255, 255, 255, .93);
  border: 1px solid rgba(255, 255, 255, .6);
  box-shadow: 0 22px 44px rgba(4, 16, 40, .3);
  backdrop-filter: blur(12px);
  animation: float 8s ease-in-out infinite;
}
.float-card__ico {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  flex: 0 0 auto;
  border-radius: 12px;
  color: #fff;
  background: var(--grad);
}
.float-card__ico svg { width: 19px; height: 19px; }
.float-card__t { font-size: 12px; font-weight: 600; color: var(--ink-400); line-height: 1.4; }
.float-card__v { font-size: 15.5px; font-weight: 800; color: var(--ink-900); line-height: 1.35; }
.float-card--a { top: 62px; left: -34px; animation-delay: -2s; }
.float-card--b { bottom: 116px; right: -40px; animation-delay: -4.5s; }
.float-card--c { bottom: 22px; left: -18px; animation-delay: -1s; }

/* ---------- 06 能力条 ---------- */
.stats {
  position: relative;
  z-index: 2;
  margin-top: -46px;
}
.stats__box {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 26px 18px;
  background: rgba(255, 255, 255, .92);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-lg);
  backdrop-filter: blur(14px);
}
.stat { text-align: center; padding: 8px 12px; }
.stat + .stat { border-left: 1px solid var(--line-soft); }
.stat__v {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat__v u { text-decoration: none; font-size: .5em; margin-left: 3px; font-weight: 700; }
.stat__l { margin-top: 8px; font-size: 13.5px; font-weight: 600; color: var(--ink-400); }

/* ---------- 07 产品介绍 ---------- */
.intro__grid {
  display: grid;
  grid-template-columns: 1fr .92fr;
  gap: 56px;
  align-items: start;
}
.intro__list { display: grid; gap: 18px; margin-top: 34px; }
.intro__item {
  display: flex;
  gap: 18px;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--sh-xs);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.intro__item:hover { transform: translateX(6px); border-color: var(--brand-200); box-shadow: var(--sh-sm); }
.intro__item h3 { font-size: 17.5px; margin-bottom: 6px; }
.intro__item p { font-size: 14.6px; color: var(--ink-500); line-height: 1.8; }

.flow {
  padding: 32px 30px;
  background: linear-gradient(160deg, #0A1E4A 0%, #0B2A66 52%, #123C8F 100%);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-lg);
  color: #fff;
  overflow: hidden;
  position: relative;
}
.flow::before {
  content: "";
  position: absolute;
  width: 300px; height: 300px;
  top: -110px; right: -90px;
  background: radial-gradient(closest-side, rgba(34, 211, 238, .42), transparent 70%);
  filter: blur(10px);
}
.flow__title { position: relative; font-size: 19px; color: #fff; margin-bottom: 6px; }
.flow__sub { position: relative; font-size: 13.5px; color: rgba(214, 230, 255, .68); margin-bottom: 26px; }
.flow__list { position: relative; display: grid; gap: 4px; }
.flow__step { position: relative; display: flex; gap: 16px; padding-bottom: 20px; }
.flow__step:last-child { padding-bottom: 0; }
.flow__step::before {
  content: "";
  position: absolute;
  left: 19px; top: 40px; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(79, 141, 253, .8), rgba(34, 211, 238, .12));
}
.flow__step:last-child::before { display: none; }
.flow__dot {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  flex: 0 0 auto;
  font-size: 13.5px;
  font-weight: 800;
  color: #06214F;
  border-radius: 13px;
  background: linear-gradient(135deg, #8FD3FF, #22D3EE);
  box-shadow: 0 10px 24px rgba(34, 211, 238, .3);
}
.flow__body { padding-top: 3px; }
.flow__body strong { display: block; font-size: 15.5px; color: #fff; }
.flow__body span { font-size: 13.4px; color: rgba(214, 230, 255, .72); line-height: 1.7; }

/* ---------- 08 核心功能 ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature { padding: 28px 26px 24px; }
.feature__top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.feature__no {
  margin-left: auto;
  font-size: 26px;
  font-weight: 800;
  color: var(--line);
  letter-spacing: -.03em;
}
.feature h3 { font-size: 18px; }
.feature p { font-size: 14.6px; color: var(--ink-500); min-height: 52px; }
.feature__tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line); }
.feature__tags span {
  padding: 4px 10px;
  font-size: 12.4px;
  font-weight: 600;
  color: var(--brand-600);
  background: var(--brand-50);
  border-radius: 7px;
}
.feature::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  background: var(--grad);
  opacity: 0;
  transition: opacity .34s;
}
.feature:hover::after { opacity: 1; }

/* ---------- 09 界面预览 ---------- */
.gallery {
  position: relative;
}
.gallery__track {
  display: flex;
  gap: 22px;
  padding: 12px 4px 30px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  cursor: grab;
}
.gallery__track::-webkit-scrollbar { display: none; }
.gallery__track.is-dragging { cursor: grabbing; scroll-snap-type: none; }
.shot {
  flex: 0 0 auto;
  width: 244px;
  scroll-snap-align: center;
  text-align: center;
}
.shot__frame {
  position: relative;
  padding: 9px;
  border-radius: 34px;
  background: linear-gradient(160deg, #FFFFFF, #EAF1FF);
  border: 1px solid var(--line);
  box-shadow: var(--sh-sm);
  transition: transform .34s var(--ease), box-shadow .34s var(--ease);
}
.shot:hover .shot__frame { transform: translateY(-8px); box-shadow: var(--sh-md); }
.shot__frame img {
  width: 100%;
  height: auto;            /* 覆盖 HTML 上的 height 属性，交给 aspect-ratio 决定高度 */
  aspect-ratio: 9 / 19.4;
  object-fit: cover;
  object-position: top center;
  border-radius: 26px;
  background: #fff;
}
.shot__zoom {
  position: absolute;
  inset: 9px;
  display: grid;
  place-items: center;
  border-radius: 26px;
  background: rgba(7, 23, 51, .48);
  color: #fff;
  opacity: 0;
  transition: opacity .3s;
  backdrop-filter: blur(2px);
}
.shot__zoom span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  font-size: 13.5px;
  font-weight: 700;
  border-radius: 999px;
  background: rgba(255, 255, 255, .2);
  border: 1px solid rgba(255, 255, 255, .4);
}
.shot__zoom svg { width: 16px; height: 16px; }
.shot:hover .shot__zoom { opacity: 1; }
.shot__cap { margin-top: 14px; font-size: 13.8px; font-weight: 600; color: var(--ink-500); line-height: 1.65; }

.gallery__nav { display: flex; justify-content: center; gap: 12px; margin-top: 4px; }
.gallery__btn {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: var(--brand-600);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--sh-sm);
  transition: transform .25s var(--ease), background .25s, color .25s, border-color .25s;
}
.gallery__btn:hover { transform: translateY(-3px); color: #fff; background: var(--brand-500); border-color: var(--brand-500); }
.gallery__btn svg { width: 20px; height: 20px; }

/* ---------- 10 电商小程序 ---------- */
.mini {
  position: relative;
  padding: 78px 0;
  color: #fff;
  background: var(--grad-dark);
  overflow: hidden;
}
.mini::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(700px 380px at 12% 8%, rgba(34, 211, 238, .22), transparent 62%),
    radial-gradient(700px 420px at 92% 96%, rgba(124, 92, 255, .26), transparent 62%),
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: auto, auto, 58px 58px, 58px 58px;
}
.mini__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}
.mini .eyebrow { color: #9FD0FF; background: rgba(255, 255, 255, .09); border-color: rgba(255, 255, 255, .18); }
.mini .eyebrow::before { background: linear-gradient(135deg, #22D3EE, #7C5CFF); box-shadow: 0 0 0 4px rgba(34, 211, 238, .16); }
.mini h2 { color: #fff; font-size: clamp(26px, 3.3vw, 40px); }
.mini__lead { margin-top: 18px; font-size: 16.5px; line-height: 1.95; color: rgba(224, 236, 255, .78); }
.mini__feats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 18px; margin-top: 30px; }
.mini__feats li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14.4px;
  color: rgba(226, 238, 255, .86);
  line-height: 1.7;
}
.mini__feats svg { width: 17px; height: 17px; margin-top: 5px; flex: 0 0 auto; color: #4FE0C1; }

.mini__panel {
  padding: 30px;
  border-radius: var(--r-xl);
  background: rgba(255, 255, 255, .075);
  border: 1px solid rgba(255, 255, 255, .16);
  box-shadow: 0 40px 80px rgba(3, 12, 32, .4);
  backdrop-filter: blur(16px);
}
.mini__steps { display: grid; gap: 16px; margin-bottom: 26px; }
.mini__step { display: flex; gap: 14px; }
.mini__step i {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  flex: 0 0 auto;
  font-style: normal;
  font-size: 14px;
  font-weight: 800;
  color: #06214F;
  border-radius: 11px;
  background: linear-gradient(135deg, #8FD3FF, #22D3EE);
}
.mini__step strong { display: block; font-size: 15.5px; color: #fff; }
.mini__step span { font-size: 13.4px; color: rgba(214, 230, 255, .7); }

/* 二维码卡 */
.qr-card {
  padding: 22px;
  text-align: center;
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: var(--sh-md);
}
.qr-card--dark {
  background: rgba(255, 255, 255, .96);
}
.qr-card__frame {
  position: relative;
  width: 100%;
  max-width: 208px;
  margin: 0 auto;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 12px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
}
.qr-card__frame img { width: 100%; height: 100%; object-fit: contain; border-radius: 10px; }
.qr-card__cap {
  margin-top: 14px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink-900);
}
.qr-card__sub { margin-top: 4px; font-size: 12.6px; color: var(--ink-400); }

/* 二维码占位框 */
.qr-blank {
  width: 100%; height: 100%;
  min-height: 0;
  display: grid;
  place-items: center;
  gap: 10px;
  padding: 16px;
  overflow: hidden;
  text-align: center;
  border-radius: 12px;
  background:
    repeating-linear-gradient(45deg, #F5F8FE 0 10px, #EDF3FD 10px 20px);
  border: 1.5px dashed #B9CCE8;
  color: var(--ink-400);
}
.qr-blank svg { width: 34px; height: 34px; color: var(--brand-400); }
.qr-blank b { display: block; font-size: 13.5px; font-weight: 700; color: var(--ink-500); }
.qr-blank small { display: block; font-size: 11.6px; line-height: 1.6; word-break: break-all; }

/* 小尺寸二维码位（页脚 / 联系方式）里的占位框缩放 */
.footer__qr .qr-blank { padding: 7px; gap: 5px; }
.footer__qr .qr-blank svg { width: 20px; height: 20px; }
.footer__qr .qr-blank b { font-size: 10.5px; }
.footer__qr .qr-blank small { font-size: 9.5px; }

/* ---------- 11 下载中心 ---------- */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}
.dl-card {
  display: flex;
  flex-direction: column;
  padding: 30px 28px 28px;
}
.dl-card--hot { border-color: var(--brand-200); box-shadow: 0 20px 46px rgba(27, 100, 235, .14); }
.dl-card__flag {
  position: absolute;
  top: -13px; left: 28px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .04em;
  border-radius: 999px;
  background: linear-gradient(135deg, #FBBF24, #F59E0B);
  box-shadow: 0 8px 18px rgba(245, 158, 11, .34);
}
.dl-card__head { display: flex; align-items: center; gap: 14px; }
.dl-card__head h3 { font-size: 20px; }
.dl-card__head p { font-size: 13.4px; color: var(--ink-400); line-height: 1.6; }
.dl-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 22px 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  overflow: hidden;
}
.dl-meta > div { padding: 11px 14px; background: #fff; }
.dl-meta > div:last-child { grid-column: 1 / -1; }
.dl-meta dt { font-size: 11.6px; font-weight: 600; color: var(--ink-400); letter-spacing: .02em; }
.dl-meta dd { margin: 3px 0 0; font-size: 14px; font-weight: 700; color: var(--ink-800); }
.dl-card__tip {
  display: flex;
  gap: 8px;
  padding: 11px 13px;
  margin-bottom: 20px;
  font-size: 12.8px;
  line-height: 1.65;
  color: var(--ink-500);
  background: var(--brand-50);
  border-radius: var(--r-sm);
}
.dl-card__tip svg { width: 15px; height: 15px; margin-top: 4px; flex: 0 0 auto; color: var(--brand-500); }
.dl-card__foot { margin-top: auto; display: grid; gap: 10px; }
.dl-card__alt { font-size: 12.6px; color: var(--ink-400); text-align: center; }

.dl-qr {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 26px;
}
.dl-qr .qr-card { display: flex; flex-direction: column; align-items: center; }

/* ---------- 12 常见问题 ---------- */
.faq { max-width: 900px; margin: 0 auto; display: grid; gap: 14px; }
.faq__item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--sh-xs);
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}
.faq__item.is-open { border-color: var(--brand-200); box-shadow: var(--sh-sm); }
.faq__q {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink-900);
}
.faq__q i {
  display: grid; place-items: center;
  width: 28px; height: 28px;
  flex: 0 0 auto;
  font-style: normal;
  font-size: 13px;
  font-weight: 800;
  color: var(--brand-600);
  background: var(--brand-50);
  border-radius: 9px;
}
.faq__sign {
  position: relative;
  width: 26px; height: 26px;
  margin-left: auto;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--brand-50);
  transition: background .3s, transform .35s var(--ease);
}
.faq__sign::before, .faq__sign::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 11px; height: 2px;
  background: var(--brand-600);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform .35s var(--ease), background .3s;
}
.faq__sign::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq__item.is-open .faq__sign { background: var(--brand-500); transform: rotate(180deg); }
.faq__item.is-open .faq__sign::before,
.faq__item.is-open .faq__sign::after { background: #fff; }
.faq__item.is-open .faq__sign::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .42s var(--ease);
}
.faq__a > div {
  padding: 0 24px 24px 68px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-500);
}

/* ---------- 13 联系我们 ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 26px;
  align-items: start;
}
.contact__cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.contact__card { padding: 22px; display: flex; gap: 14px; align-items: flex-start; }
.contact__card .ico { width: 44px; height: 44px; border-radius: 13px; }
.contact__card .ico svg { width: 21px; height: 21px; }
.contact__card dt { font-size: 12.6px; font-weight: 600; color: var(--ink-400); }
.contact__card dd { margin: 5px 0 0; font-size: 15.5px; font-weight: 700; color: var(--ink-900); word-break: break-all; }

.form { padding: 30px; }
.form__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.field { display: grid; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13.4px; font-weight: 700; color: var(--ink-700); }
.field label em { font-style: normal; color: var(--rose); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 13px 15px;
  font: inherit;
  font-size: 14.6px;
  color: var(--ink-900);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color .25s, box-shadow .25s;
}
.field textarea { min-height: 104px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: #A9B7CC; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--brand-400);
  box-shadow: 0 0 0 4px rgba(79, 141, 253, .16);
}
.form__note { margin-top: 14px; font-size: 12.8px; color: var(--ink-400); line-height: 1.7; }
.form__msg {
  display: none;
  margin-top: 14px;
  padding: 12px 15px;
  font-size: 13.8px;
  font-weight: 600;
  border-radius: var(--r-sm);
}
.form__msg.is-ok { display: block; color: #065F46; background: #ECFDF5; border: 1px solid #A7F3D0; }
.form__msg.is-err { display: block; color: #9F1239; background: #FFF1F2; border: 1px solid #FECDD3; }

/* ---------- 14 页脚 ---------- */
.footer {
  position: relative;
  padding: 66px 0 30px;
  color: rgba(206, 222, 245, .74);
  background: linear-gradient(180deg, #071733, #050F24);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
  gap: 44px;
  padding-bottom: 42px;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}
.footer h4 { font-size: 14.5px; color: #fff; margin-bottom: 18px; letter-spacing: .02em; }
.footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer__brand img { width: 40px; height: 40px; border-radius: 12px; background: #fff; }
.footer__brand strong { display: block; font-size: 17px; color: #fff; }
.footer__brand span { font-size: 11.6px; letter-spacing: .1em; color: rgba(206, 222, 245, .55); }
.footer__desc { font-size: 13.8px; line-height: 1.85; max-width: 340px; }
.footer__links { display: grid; gap: 11px; }
.footer__links a, .footer__links span { font-size: 13.8px; transition: color .25s; }
.footer__links a:hover { color: #fff; }
.footer__qr { display: flex; gap: 14px; }
.footer__qr .qr-card { padding: 12px; background: rgba(255, 255, 255, .95); box-shadow: none; }
.footer__qr .qr-card__frame { max-width: 104px; padding: 7px; border-radius: 12px; }
.footer__qr .qr-card__cap { margin-top: 8px; font-size: 12px; }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  justify-content: space-between;
  padding-top: 26px;
  font-size: 12.8px;
  color: rgba(180, 200, 228, .62);
}
.footer__bottom p { line-height: 1.8; }

/* ---------- 15 浮层 ---------- */
.to-top {
  position: fixed;
  right: 26px; bottom: 30px;
  z-index: 100;
  width: 50px; height: 50px;
  display: grid; place-items: center;
  color: #fff;
  border-radius: 50%;
  background: var(--grad-btn);
  box-shadow: var(--sh-brand);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(.9);
  transition: opacity .3s, transform .3s var(--ease), visibility .3s;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { transform: translateY(-4px); }
.to-top svg { width: 21px; height: 21px; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 140;
  display: none;
  place-items: center;
  padding: 24px;
}
.modal.is-open { display: grid; }
.modal__mask {
  position: absolute;
  inset: 0;
  background: rgba(7, 23, 51, .62);
  backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity .3s;
}
.modal.is-open .modal__mask { opacity: 1; }
.modal__box {
  position: relative;
  width: min(430px, 100%);
  padding: 30px 28px 26px;
  text-align: center;
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: var(--sh-lg);
  transform: translateY(18px) scale(.96);
  opacity: 0;
  transition: transform .38s var(--ease), opacity .38s;
}
.modal.is-open .modal__box { transform: none; opacity: 1; }
.modal__ico {
  display: grid; place-items: center;
  width: 58px; height: 58px;
  margin: 0 auto 18px;
  color: #fff;
  border-radius: 18px;
  background: var(--grad);
  box-shadow: var(--sh-brand);
}
.modal__ico svg { width: 28px; height: 28px; }
.modal__box h3 { font-size: 19.5px; margin-bottom: 10px; }
.modal__box p { font-size: 14.4px; line-height: 1.85; color: var(--ink-500); }
.modal__box code {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 8px;
  font-size: 12.8px;
  color: var(--brand-700);
  background: var(--brand-50);
  border-radius: 6px;
  word-break: break-all;
}
.modal__actions { margin-top: 22px; }

/* 灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: none;
  place-items: center;
  padding: 26px;
}
.lightbox.is-open { display: grid; }
.lightbox__mask {
  position: absolute;
  inset: 0;
  background: rgba(4, 12, 28, .88);
  backdrop-filter: blur(8px);
}
.lightbox__stage { position: relative; display: grid; place-items: center; gap: 16px; max-height: 100%; }
.lightbox__stage img {
  max-height: 78vh;
  width: auto;
  border-radius: 22px;
  box-shadow: 0 40px 90px rgba(0, 0, 0, .6);
  background: #fff;
}
.lightbox__cap { font-size: 14.5px; font-weight: 600; color: rgba(232, 240, 255, .9); text-align: center; }
.lightbox__close, .lightbox__prev, .lightbox__next {
  position: absolute;
  display: grid; place-items: center;
  color: #fff;
  background: rgba(255, 255, 255, .13);
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 50%;
  backdrop-filter: blur(8px);
  transition: background .25s, transform .25s;
}
.lightbox__close:hover, .lightbox__prev:hover, .lightbox__next:hover { background: rgba(255, 255, 255, .26); }
.lightbox__close { top: -58px; right: 0; width: 44px; height: 44px; }
.lightbox__close svg { width: 20px; height: 20px; }
.lightbox__prev, .lightbox__next { top: 50%; width: 52px; height: 52px; margin-top: -26px; }
.lightbox__prev { left: -76px; }
.lightbox__next { right: -76px; }
.lightbox__prev svg, .lightbox__next svg { width: 22px; height: 22px; }

/* ---------- 16 动效 ---------- */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-13px); }
}
@keyframes orb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(34px, -26px) scale(1.08); }
  66% { transform: translate(-26px, 22px) scale(.95); }
}

/* 仅当 JS 可用时才启用入场动画；JS 失效时内容照常显示，不会白屏 */
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.js .reveal[data-d="1"] { transition-delay: .08s; }
.js .reveal[data-d="2"] { transition-delay: .16s; }
.js .reveal[data-d="3"] { transition-delay: .24s; }
.js .reveal[data-d="4"] { transition-delay: .32s; }
.js .reveal[data-d="5"] { transition-delay: .4s; }

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

/* ---------- 17 响应式 ---------- */
@media (max-width: 1120px) {
  .nav__link { padding: 0 11px; font-size: 14.5px; }
  .hero__grid { gap: 34px; }
  .float-card--a { left: -12px; }
  .float-card--b { right: -14px; }
  .lightbox__prev { left: 8px; }
  .lightbox__next { right: 8px; }
  .lightbox__close { top: 8px; right: 8px; }
}

@media (max-width: 1000px) {
  :root { --header-h: 66px; }
  .nav, .header__cta .btn { display: none; }
  .burger { display: grid; }
  .section { padding: 78px 0; }
  .hero { padding: calc(var(--header-h) + 52px) 0 76px; }
  .hero__grid { grid-template-columns: 1fr; gap: 46px; }
  .hero__visual { min-height: auto; }
  .intro__grid, .mini__grid, .contact__grid { grid-template-columns: 1fr; gap: 34px; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .dl-grid, .dl-qr { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: repeat(2, 1fr); gap: 34px; }
  .stats__box { grid-template-columns: repeat(2, 1fr); gap: 4px; }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line-soft); }
}

@media (max-width: 720px) {
  body { font-size: 15.4px; }
  .container { padding: 0 18px; }
  .section { padding: 62px 0; }
  .section-head { margin-bottom: 40px; }
  .hero__title { font-size: clamp(28px, 8vw, 38px); }
  .hero__desc { font-size: 15.4px; }
  .hero__actions { gap: 10px; }
  .hero__actions .btn { flex: 1 1 100%; height: 52px; }
  .phone { width: 244px; }
  .float-card { display: none; }
  .features { grid-template-columns: 1fr; }
  .mini__feats { grid-template-columns: 1fr; }
  .contact__cards { grid-template-columns: 1fr; }
  .form__grid { grid-template-columns: 1fr; }
  .form { padding: 22px; }
  .footer__grid { grid-template-columns: 1fr; }
  .dl-meta { grid-template-columns: 1fr; }
  .shot { width: 210px; }
  .gallery__track { gap: 16px; }
  .lightbox__stage img { max-height: 70vh; }
  .faq__a > div { padding-left: 24px; }
  .to-top { right: 16px; bottom: 18px; width: 46px; height: 46px; }
  .footer__qr { flex-wrap: wrap; }
}

@media print {
  .header, .to-top, .mini__panel, .btn { display: none !important; }
  body { background: #fff; }
}