:root {
  color-scheme: dark;

  --bg:        #08131F;
  --bg-alt:    #0A1622;
  --bg-deep:   #060F18;
  --bg-deeper: #04090F;
  --card:      #0F1F30;
  --card-2:    #12283A;
  --card-hover:#13263A;

  --line:        rgba(255, 255, 255, .08);
  --line-strong: rgba(255, 255, 255, .16);

  --text:   #FFFFFF;
  --text-2: #93A9BA;
  --text-3: #7A93A4;
  --text-4: #5E7A8C;
  --text-5: #4F6675;

  --mint:      #2DD4BF;
  --mint-soft: #7FE3D5;
  --mint-ink:  #04231F;
  --sky:       #57B8FF;
  --sky-soft:  #9CD4FF;
  --amber:     #FFB454;
  --amber-soft:#FFCB84;

  --radius-card: 24px;
  --radius-md:   18px;
  --radius-btn:  13px;

  --header-h: 72px;
  --ease: cubic-bezier(.16, 1, .3, 1);

  --font-cjk: "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter Tight", "Inter", "SF Pro Display", -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --header-bg:             rgba(8, 19, 31, .82);
  --header-bg-scrolled:    rgba(6, 15, 24, .94);
  --header-border-scrolled: rgba(255, 255, 255, .12);
  --nav-panel-bg:          rgba(6, 15, 24, .98);
  --jump-bg:               rgba(6, 15, 24, .92);
  --jump-shadow:           rgba(0, 0, 0, .9);

  --btn-mint-hover:   #4ee0cd;
  --mint-glow:        rgba(45, 212, 191, .55);
  --btn-ghost-bg:     #0E1E2E;
  --btn-ghost-bg-hover: #14293C;
  --btn-ghost-text:   #C8D8E4;
  --toggle-bar:       #C8D8E4;
  --border-hover:     rgba(255, 255, 255, .28);

  --chip-mint-bg:   #10283A;
  --chip-sky-bg:    #102234;
  --chip-amber-bg:  #33261A;
  --badge-mint-border: rgba(45, 212, 191, .35);

  --hero-glow-a:    rgba(23, 96, 96, .40);
  --hero-glow-b:    rgba(23, 62, 96, .32);
  --hero-fade-from: rgba(8, 19, 31, 0);
  --visual-glow:    rgba(29, 110, 110, .55);

  --card-desc: #8AA0B0;

  --cta-border: rgba(255, 255, 255, .10);
  --cta-bg-a:   rgba(16, 64, 61, .95);
  --cta-bg-b:   rgba(15, 44, 68, .95);
  --cta-lead:   #A9C6C4;
  --biz-bg:     rgba(4, 9, 15, .38);

  --surface-faint: rgba(255, 255, 255, .03);
  --surface-soft:  rgba(255, 255, 255, .07);
  --surface-th:    rgba(255, 255, 255, .035);
  --border-soft-hover: rgba(255, 255, 255, .3);

  --note-bg:         #10283A;
  --note-border:     rgba(45, 212, 191, .28);
  --toc-border-hover: rgba(45, 212, 191, .45);
  --fn-note-bg:      rgba(255, 180, 84, .07);

  --text-strong: #FFFFFF;
  --text-body:   #A3B8C6;
}

html[data-theme='light'] {
  color-scheme: light;

  --bg:        #F5F8FA;
  --bg-alt:    #EDF2F6;
  --bg-deep:   #ECF1F5;
  --bg-deeper: #E4EBF1;
  --card:      #FFFFFF;
  --card-2:    #F0F5F8;
  --card-hover:#F7FAFC;

  --line:        rgba(10, 26, 38, .10);
  --line-strong: rgba(10, 26, 38, .18);

  --text:   #12242F;
  --text-2: #46606F;
  --text-3: #5A7383;
  --text-4: #5A7184;
  --text-5: #586A7B;

  --mint:      #0E7F74;
  --mint-soft: #0A7263;
  --mint-ink:  #FFFFFF;
  --sky:       #1178C4;
  --sky-soft:  #2B86D0;
  --amber:     #C77418;
  --amber-soft:#A8620F;

  --header-bg:             rgba(245, 248, 250, .88);
  --header-bg-scrolled:    rgba(240, 245, 248, .96);
  --header-border-scrolled: rgba(10, 26, 38, .14);
  --nav-panel-bg:          rgba(247, 250, 252, .98);
  --jump-bg:               rgba(255, 255, 255, .94);
  --jump-shadow:           rgba(15, 35, 50, .18);

  --btn-mint-hover:   #0C6D64;
  --mint-glow:        rgba(15, 165, 144, .35);
  --btn-ghost-bg:     #FFFFFF;
  --btn-ghost-bg-hover: #EDF3F7;
  --btn-ghost-text:   #33505F;
  --toggle-bar:       #33505F;
  --border-hover:     rgba(10, 26, 38, .35);

  --chip-mint-bg:   #E2F6F2;
  --chip-sky-bg:    #E3F0FB;
  --chip-amber-bg:  #FBEEDD;
  --badge-mint-border: rgba(15, 165, 144, .35);

  --hero-glow-a:    rgba(66, 170, 160, .20);
  --hero-glow-b:    rgba(87, 140, 180, .16);
  --hero-fade-from: rgba(245, 248, 250, 0);
  --visual-glow:    rgba(45, 150, 140, .22);

  --card-desc: #4F6878;

  --cta-border: rgba(10, 26, 38, .10);
  --cta-bg-a:   rgba(224, 240, 238, .95);
  --cta-bg-b:   rgba(224, 236, 244, .95);
  --cta-lead:   #3D6B66;
  --biz-bg:     rgba(255, 255, 255, .55);

  --surface-faint: rgba(10, 26, 38, .03);
  --surface-soft:  rgba(10, 26, 38, .06);
  --surface-th:    rgba(10, 26, 38, .04);
  --border-soft-hover: rgba(10, 26, 38, .3);

  --note-bg:         #E2F6F2;
  --note-border:     rgba(15, 165, 144, .35);
  --toc-border-hover: rgba(15, 165, 144, .5);
  --fn-note-bg:      rgba(199, 116, 24, .09);

  --text-strong: #0E1C26;
  --text-body:   #3E5666;
}


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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-cjk);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color .25s var(--ease), color .25s var(--ease);
}

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--mint); color: var(--mint-ink); }

.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.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;
}

.skip-link {
  position: absolute; top: 0; left: 50%;
  transform: translate(-50%, -120%);
  z-index: 999;
  padding: 12px 22px;
  background: var(--mint); color: var(--mint-ink);
  font-weight: 600; border-radius: 0 0 12px 12px;
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }


/* 嵌入浏览（APP 跳转 / 小程序 web-view 打开）：隐藏站点级导航与页脚，
   由 head 内联脚本按 embed 参数或小程序 UA 写入 html[data-embed] */
html[data-embed] [data-embed-hide] { display: none !important; }


.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding-left: 80px;
  padding-right: 80px;
}
.container--narrow { max-width: 940px; }


.hero__title {
  font-size: clamp(36px, 4.45vw, 64px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.h2 {
  font-size: clamp(26px, 3.2vw, 46px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -.01em;
  text-wrap: balance;
}
.h2--tight { font-size: clamp(26px, 2.9vw, 42px); }

.h3 {
  font-size: clamp(22px, 2.4vw, 34px);
  font-weight: 700;
  line-height: 1.32;
  text-wrap: balance;
}

.lead {
  font-size: clamp(15px, 1.18vw, 17px);
  color: var(--text-2);
  line-height: 1.8;
  text-wrap: pretty;
}

.eyebrow {
  font-size: 13px;
  font-weight: 600;
  color: var(--mint);
  letter-spacing: .04em;
}
.eyebrow--center { text-align: center; }
.eyebrow--amber { color: var(--amber); }


.is-mint  { color: var(--mint); }
.is-sky   { color: var(--sky); }
.is-amber { color: var(--amber); }

.phone .is-mint  { color: #7FE3D5; }
.phone .is-sky   { color: #9CD4FF; }
.phone .is-amber { color: #FFCB84; }


.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 17px 34px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: transform .2s var(--ease), background-color .2s var(--ease),
              border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.btn--sm { padding: 11px 24px; font-size: 15px; }
.btn--block { width: 100%; }

.btn--mint {
  background: var(--mint);
  color: var(--mint-ink);
  box-shadow: 0 0 0 rgba(45, 212, 191, 0);
}
.btn--mint:hover {
  background: var(--btn-mint-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -8px var(--mint-glow);
}

.btn--ghost {
  background: var(--btn-ghost-bg);
  color: var(--btn-ghost-text);
  border: 1px solid var(--line-strong);
  font-weight: 500;
}
.btn--ghost:hover {
  background: var(--btn-ghost-bg-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

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


.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}
.badge--mint {
  background: var(--chip-mint-bg);
  color: var(--mint-soft);
  border: 1px solid var(--badge-mint-border);
}
.badge__dot {
  width: 7px; height: 7px; border-radius: 999px;
  background: var(--mint);
  flex: 0 0 auto;
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .45; transform: scale(.78); }
}

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.5;
}
.chip--mint  { background: var(--chip-mint-bg); color: var(--mint-soft); }
.chip--sky   { background: var(--chip-sky-bg); color: var(--sky-soft); }
.chip--amber { background: var(--chip-amber-bg); color: var(--amber-soft); }


.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.site-header.is-scrolled {
  background: var(--header-bg-scrolled);
  border-bottom-color: var(--header-border-scrolled);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; gap: 12px; }

.brand__mark {
  width: 38px; height: 38px;
  flex: 0 0 auto;
  display: block;
  border-radius: 23%;
  object-fit: cover;
}
.brand__mark--sm { width: 34px; height: 34px; }

.brand__text { display: flex; flex-direction: column; gap: 1px; }
.brand__text strong { font-size: 19px; font-weight: 700; line-height: 1.2; }
.brand__text em {
  font-family: var(--font-num);
  font-style: normal;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--text-4);
  line-height: 1.2;
}

.nav { display: flex; align-items: center; gap: 42px; }
.nav a {
  font-size: 15px;
  color: var(--text-2);
  transition: color .2s var(--ease);
  position: relative;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--text); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 1.6px;
  border-radius: 2px;
  background: var(--toggle-bar);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }


.hero { position: relative; overflow: hidden; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 55% at 88% 42%, var(--hero-glow-a) 0%, var(--hero-fade-from) 70%),
    radial-gradient(45% 40% at 8% 92%, var(--hero-glow-b) 0%, var(--hero-fade-from) 72%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: clamp(140px, 20vh, 240px);
  background: linear-gradient(to bottom, var(--hero-fade-from), var(--bg) 88%);
  pointer-events: none;
  z-index: 0;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 56px;
  padding-top: clamp(48px, 7vh, 104px);
  padding-bottom: clamp(60px, 8vh, 116px);
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100svh - var(--header-h));
}

.hero__text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 28px;
}
.hero__lead {
  font-size: clamp(15px, 1.25vw, 18px);
  color: var(--text-2);
  line-height: 1.8;
  max-width: 34em;
}
.hero__trust {
  font-size: 13px;
  color: var(--text-4);
  line-height: 1.7;
}

.hero__visual {
  position: relative;
  flex: 0 0 auto;
  width: 400px;
  display: grid;
  place-items: center;
  padding: 22px 0;
}
.hero__visual::before {
  content: "";
  position: absolute;
  inset: -12% -6%;
  border-radius: 50%;
  background: radial-gradient(closest-side, var(--visual-glow) 0%, var(--hero-fade-from) 100%);
  pointer-events: none;
}


.phone {
  position: relative;
  width: min(336px, 74vw);
  aspect-ratio: 336 / 684;
  padding: 11px;
  border-radius: 48px;
  background: #0D1B29;
  border: 1.5px solid var(--line-strong);

  box-shadow: 0 18px 44px rgba(0, 0, 0, .40), 0 0 0 1px rgba(45, 212, 191, .07);
}
.phone__screen {
  height: 100%;
  border-radius: 38px;
  overflow: hidden;
  background: #0A1520;
  display: flex;
  flex-direction: column;
}
.phone__status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  flex: 0 0 auto;
}
.phone__time {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: #FFFFFF;
}
.phone__signal { display: flex; align-items: center; gap: 5px; }
.phone__signal i {
  width: 5px; height: 5px; border-radius: 999px;
  background: #5E7A8C;
}
.phone__signal i.is-on { background: #2DD4BF; }

.phone__photo { flex: 1 1 auto; min-height: 0; overflow: hidden; }
.phone__photo img { width: 100%; height: 100%; object-fit: cover; }

.phone__info {
  flex: 0 0 auto;
  padding: 20px 22px 24px;
  background: #0D1B29;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.phone__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: #FFFFFF;
}
.phone__sub { font-size: 12px; color: #93A9BA; line-height: 1.5; }

.metrics { display: flex; gap: 10px; }
.metrics li {
  flex: 1 1 0;
  min-width: 0;
  padding: 12px 14px;
  border-radius: 14px;
  background: #12283A;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.metrics strong {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.metrics span { font-size: 11px; color: #8AA0B0; line-height: 1.4; }



.section {
  padding: clamp(48px, 5.5vw, 80px) 0;
  scroll-margin-top: var(--header-h);
}

.section--alt { background: var(--bg-alt); }

.section__head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 46em;
}
.section__head--center {
  align-items: center;
  text-align: center;
  max-width: 52em;
  margin-left: auto;
  margin-right: auto;
}
.section__head .lead { max-width: 62ch; text-wrap: pretty; }

.btn-row--center { justify-content: center; margin-top: 30px; }


.feature {
  display: grid;
  grid-template-columns: 500px minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}
.feature + .feature { margin-top: clamp(36px, 4vw, 56px); }
.feature--reverse { grid-template-columns: minmax(0, 1fr) 500px; }
.feature--reverse .feature__media { order: 2; }

.feature__media {
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--card-2);
}

.feature__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.feature:hover .feature__media img { transform: scale(1.035); }

.feature__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}
.feature__num { font-size: 13px; font-weight: 600; letter-spacing: .04em; }

.feature__desc { font-size: clamp(16px, 1.18vw, 17px); color: var(--text-2); line-height: 1.85; }

.section__head + .feature { margin-top: clamp(36px, 4vw, 56px); }


.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: clamp(36px, 4vw, 52px);
}
.card {
  padding: 30px 28px;
  border-radius: var(--radius-card);
  background: var(--card);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  transition: transform .3s var(--ease), background-color .3s var(--ease),
              border-color .3s var(--ease);
}
.card:hover {
  background: var(--card-hover);
  border-color: var(--line-strong);
  transform: translateY(-4px);
}
.card__icon {
  width: 50px; height: 50px;
  border-radius: 15px;
  background: var(--card-2);
  display: grid;
  place-items: center;
  color: inherit;
}
.card__icon svg { width: 26px; height: 26px; }
.card__title { font-size: 20px; font-weight: 600; line-height: 1.4; }
.card__desc { font-size: 14px; color: var(--card-desc); line-height: 1.75; }



.cta-card {
  --qr-size: 148px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 64px;
  align-items: center;
  padding: 56px 60px;
  border-radius: 28px;
  border: 1px solid var(--cta-border);
  background:
    radial-gradient(120% 140% at 0% 0%, var(--cta-bg-a) 0%, var(--cta-bg-b) 100%);
}
.cta-card__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}
.cta-card__text .lead { color: var(--cta-lead); }


.cta-card__note { font-size: 12px; color: var(--text-2); line-height: 1.7; }


.qr-row { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 4px; }
.qr { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.qr__frame {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--qr-size);
  height: var(--qr-size);
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface-faint);
  cursor: zoom-in;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

/* 悬停放大（仅精确指针设备）：缩放不触发回流，z-index 抬升避免被邻框压住；
   1.08 倍仅向 22px 间距内各扩约 6px，不与相邻二维码/标签重叠。 */
@media (hover: hover) and (pointer: fine) {
  .qr:hover .qr__frame { border-color: var(--border-soft-hover); transform: scale(1.08); position: relative; z-index: 5; }
}
.qr__frame:focus-visible { outline: 2px solid var(--border-soft-hover); outline-offset: 3px; }
.qr:hover .qr__frame { border-color: var(--border-soft-hover); }
.qr__frame img { width: 100%; height: 100%; border-radius: inherit; object-fit: contain; }
.qr__frame--live { border-style: solid; background: #fff; }
.qr__label { font-size: 14px; font-weight: 600; color: var(--text-2); }


/* 二维码点击展开大图弹层（纯原生，无依赖）：放大展示 + 保存图片 */
.qr-lightbox { position: fixed; inset: 0; z-index: 900; display: flex; align-items: center; justify-content: center; padding: 24px; }
.qr-lightbox[hidden] { display: none; }
.qr-lightbox__overlay { position: absolute; inset: 0; background: rgba(2, 7, 12, .82); }
.qr-lightbox__panel { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 54px 28px 30px; max-width: min(360px, 92vw); background: rgba(8, 19, 31, .97); border: 1px solid rgba(255, 255, 255, .12); border-radius: var(--radius-md); box-shadow: 0 24px 64px rgba(0, 0, 0, .55); }
.qr-lightbox__img { width: min(280px, 68vw); height: auto; border-radius: 12px; background: #fff; }
.qr-lightbox__title { margin: 0; font-size: 15px; font-weight: 600; color: var(--text-2); text-align: center; }
.qr-lightbox__close { position: absolute; top: 14px; right: 12px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; font-size: 24px; line-height: 1; color: var(--text-2); border-radius: 50%; transition: background-color .2s var(--ease); }
.qr-lightbox__close:hover { background: rgba(255, 255, 255, .08); }
.animate-zoom { animation: qr-zoom .24s var(--ease); }
@keyframes qr-zoom { from { transform: scale(.94); opacity: .6; } to { transform: scale(1); opacity: 1; } }

.cta-card__biz {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--biz-bg);

  scroll-margin-top: calc(var(--header-h) + 20px);
}
.cta-card__biz-title { font-size: 19px; font-weight: 600; }
.cta-card__biz-desc { font-size: 14px; color: var(--text-2); line-height: 1.75; }
.cta-card__biz-list { display: flex; flex-direction: column; gap: 10px; }
.cta-card__biz-list li { font-size: 14px; color: var(--text-3); }
.cta-card__biz-list a { color: var(--mint-soft); font-weight: 600; }
.cta-card__biz-list a:hover { color: var(--mint); }


.snack__packs {
  display: flex;
  gap: 18px;
  align-items: flex-end;
  justify-content: center;
  padding: 30px;
  height: 100%;
}
.snack__packs img {
  width: min(190px, 38%);
  height: auto;
  aspect-ratio: auto;
  object-fit: contain;
  border-radius: 10px;
}
.snack__note { font-size: 12.5px; color: var(--text-3); line-height: 1.7; }


.faq {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: clamp(36px, 4.5vw, 48px);
}
.faq__item {
  border-radius: var(--radius-md);
  background: var(--card);
  border: 1px solid transparent;
  transition: background-color .25s var(--ease), border-color .25s var(--ease);
}
.faq__item[open] { background: var(--card-hover); border-color: var(--line); }
.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 28px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__chevron {
  width: 20px; height: 20px;
  flex: 0 0 auto;
  color: var(--text-3);
  transition: transform .25s var(--ease), color .25s var(--ease);
}
.faq__item[open] .faq__chevron { transform: rotate(180deg); color: var(--mint); }
.faq__a {
  padding: 0 28px 24px;
  margin-top: -6px;
  font-size: 15px;
  color: var(--card-desc);
  line-height: 1.85;
}



.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--header-h);
}

.footer__main {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) 190px 190px 190px;
  gap: 72px;
  padding-top: 72px;
  padding-bottom: 72px;
  align-items: start;
}
.footer__brand { display: flex; flex-direction: column; gap: 18px; align-items: flex-start; }
.footer__brand-row { display: flex; align-items: center; gap: 12px; }
.footer__brand-row strong { font-size: 19px; font-weight: 700; }
.footer__brand p { font-size: 14px; color: var(--text-3); line-height: 1.8; }

.footer__col { display: flex; flex-direction: column; gap: 14px; }
.footer__col h4 { font-size: 15px; font-weight: 600; }
.footer__col ul { display: flex; flex-direction: column; gap: 14px; }
.footer__col a {
  font-size: 14px;
  color: var(--text-3);
  transition: color .2s var(--ease);
}
.footer__col a:hover { color: var(--mint); }

.footer__bottom {
  background: var(--bg-deeper);
  padding-top: 26px;
  padding-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.footer__note { font-size: 12px; color: var(--text-5); line-height: 1.75; }
.footer__legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer__legal p { font-size: 13px; color: var(--text-4); }
.footer__filings { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.footer__filings a { transition: color .2s var(--ease); }
.footer__filings a:hover { color: var(--mint); }



.legal { padding: clamp(40px, 5vw, 68px) 0 clamp(72px, 9vw, 120px); }
.container--legal { max-width: 860px; }


.page-legal .site-header__inner { max-width: 860px; }

.legal__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}
.legal__title {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
  text-wrap: balance;
}
.legal__meta { font-size: 13px; color: var(--text-4); line-height: 1.7; }

.legal__note {
  margin-top: 26px;
  padding: 18px 22px;
  border-radius: var(--radius-md);
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  color: var(--mint-soft);
  font-size: 14px;
  line-height: 1.85;
}
.legal__note strong { color: var(--text-strong); font-weight: 600; }

.legal__toc { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.legal__toc a {
  padding: 8px 15px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.legal__toc a:hover { color: var(--mint); border-color: var(--toc-border-hover); }

.legal__body { margin-top: 44px; }
.legal__body h2 {
  font-size: clamp(19px, 1.9vw, 24px);
  font-weight: 700;
  line-height: 1.45;
  margin-top: 46px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.legal__body h2:first-child { margin-top: 0; }
.legal__body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  margin-top: 26px;
}
.legal__body p,
.legal__body li { font-size: 15px; color: var(--text-body); line-height: 1.9; }
.legal__body p { margin-top: 14px; }
.legal__body ul,
.legal__body ol { margin-top: 14px; padding-left: 24px; }
.legal__body ul { list-style: disc; }
.legal__body ol { list-style: decimal; }
.legal__body li { margin-top: 8px; }
.legal__body li::marker { color: var(--text-4); }
.legal__body strong { color: var(--text-strong); font-weight: 600; }
.legal__body a { color: var(--mint); text-decoration: underline; text-underline-offset: 3px; }
.legal__body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .92em;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-soft);
}


.legal__scroll {
  margin-top: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.legal__table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 14px; }
.legal__table th,
.legal__table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.75;
  border-bottom: 1px solid var(--line);
}
.legal__table th:first-child,
.legal__table td:first-child { padding-left: 18px; }
.legal__table th:last-child,
.legal__table td:last-child { padding-right: 18px; }
.legal__table th {
  color: var(--text-strong);
  font-weight: 600;
  background: var(--surface-th);
  white-space: nowrap;
}
.legal__table td { color: var(--text-body); }
.legal__table tbody tr:last-child td { border-bottom: 0; }

.legal__hint {
  display: none;
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-4);
  line-height: 1.6;
}
@media (max-width: 720px) {
  .legal__hint { display: block; }
}



.fn-hero { padding: clamp(52px, 7.5vw, 96px) 0 clamp(30px, 4vw, 46px); }
.fn-hero__title {
  margin-top: 16px;
  font-size: clamp(30px, 4.4vw, 54px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.015em;
}
.fn-hero__lead {
  margin-top: 20px;
  max-width: 780px;
  font-size: clamp(15px, 1.4vw, 17px);
  color: var(--text-2);
  line-height: 1.9;
}
.fn-hero__meta {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.8;
}
.fn-toc { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.fn-toc a {
  display: inline-block;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-faint);
  font-size: 13.5px;
  color: var(--text-3);
  text-decoration: none;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}
.fn-toc a:hover,
.fn-toc a:focus-visible {
  color: var(--text);
  border-color: var(--line-strong);
  background: var(--surface-soft);
}

.fn {
  margin-top: clamp(30px, 3.6vw, 48px);
  padding-top: clamp(28px, 3.4vw, 44px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.fn:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.fn__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 14px; }
.fn__num {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}
.fn__title { font-size: clamp(20px, 2.3vw, 27px); font-weight: 700; line-height: 1.3; }
.fn__sub { flex: 1 1 100%; font-size: 14.5px; color: var(--sky); line-height: 1.65; }
.fn__desc {
  margin-top: 15px;
  max-width: 880px;
  font-size: 15.5px;
  color: var(--text-2);
  line-height: 1.9;
}
.fn__list { margin-top: 16px; display: grid; gap: 9px; max-width: 920px; }
.fn__list li {
  position: relative;
  padding-left: 19px;
  font-size: 14.5px;
  color: var(--text-3);
  line-height: 1.85;
}
.fn__list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: .76em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--mint);
}
.fn__list strong { color: var(--text); font-weight: 600; }
.fn__list a { color: var(--sky); text-decoration: underline; text-underline-offset: 3px; }
.fn__list a:hover { color: var(--sky-soft); }
.fn__note {
  margin-top: 16px;
  max-width: 880px;
  padding: 12px 16px;
  border-left: 2px solid var(--amber);
  background: var(--fn-note-bg);
  border-radius: 0 10px 10px 0;
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.8;
}
.fn__ends { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 15px; }
.fn__ends-label { font-size: 12.5px; color: var(--text-3); }

@media (max-width: 640px) {
  .fn__list li { font-size: 14px; }
}


.nf { min-height: 56vh; display: flex; align-items: center; }
.nf__actions { margin-top: 30px; }
.nf__hint { margin-top: 26px; font-size: 13px; color: var(--text-3); line-height: 1.85; max-width: 46em; }
.nf__hint a { color: var(--mint); text-underline-offset: 3px; }
.nf__hint a:hover { color: var(--mint-soft); }


.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}
.js .reveal[data-delay="1"] { transition-delay: .1s; }
.js .reveal[data-delay="2"] { transition-delay: .2s; }
.js .reveal.is-visible { opacity: 1; transform: none; }


@media (max-width: 1240px) {
  .container { padding-left: 56px; padding-right: 56px; }
  .feature { grid-template-columns: 430px minmax(0, 1fr); gap: 48px; }
  .feature--reverse { grid-template-columns: minmax(0, 1fr) 430px; }
  .footer__main { gap: 48px; grid-template-columns: minmax(0, 1.4fr) 160px 160px 170px; }
}

@media (max-width: 1080px) {
  .hero__inner { gap: 36px; }
  .hero__visual { width: 340px; }
  .phone { width: min(300px, 66vw); }
  .cta-card { grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; padding: 48px 44px; }
  .footer__main { grid-template-columns: minmax(0, 1fr) 1fr 1fr; row-gap: 44px; }
  .footer__brand { grid-column: 1 / -1; }
}

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

  .container { padding-left: 32px; padding-right: 32px; }

  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .nav {
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 32px 20px;
    background: var(--nav-panel-bg);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a {
    width: 100%;
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .nav a::after { display: none; }
  .nav a:last-child { border-bottom: 0; }

  .hero__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 44px;
    min-height: 0;
    padding-top: 48px;
    padding-bottom: 64px;
  }
  .hero__visual { width: 100%; }
  .phone { width: min(320px, 76vw); }

  .feature,
  .feature--reverse { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .feature--reverse .feature__media { order: 0; }

  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .cta-card { grid-template-columns: minmax(0, 1fr); gap: 36px; padding: 40px 32px; }
  .cta-card__biz { padding: 24px; }
}

@media (max-width: 640px) {
  .container { padding-left: 22px; padding-right: 22px; }


  .cta-card { --qr-size: clamp(84px, calc((100vw - 134px) / 2), 148px); }

  .cards { grid-template-columns: minmax(0, 1fr); }
  .footer__main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px 24px;
    padding-top: 56px; padding-bottom: 56px;
  }
  .footer__brand { grid-column: 1 / -1; }
  .footer__legal { flex-direction: column; align-items: flex-start; gap: 10px; }

  .btn { padding: 16px 26px; font-size: 15px; }
  .btn-row { width: 100%; }
  .btn-row .btn { flex: 1 1 auto; }

  .faq__q { padding: 20px 22px; font-size: 16px; }
  .faq__a { padding: 0 22px 20px; }
}

@media (max-width: 400px) {
  .brand__text em { display: none; }
}



.page-jump {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 200;
  display: none;
  flex-direction: column;
  width: 104px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn);
  background: var(--jump-bg);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  box-shadow: 0 18px 40px -18px var(--jump-shadow);
  overflow: hidden;
}

.js .page-jump {
  display: flex;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
}
.js .page-jump.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.js.nav-open .page-jump {
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
}

.page-jump__btn {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.page-jump__btn + .page-jump__btn { border-top: 1px solid var(--line); }
.page-jump__btn:hover { background: var(--btn-ghost-bg-hover); color: var(--text); }


.js .page-jump.is-bottom .page-jump__btn--down { display: none; }

.page-jump__btn svg { width: 16px; height: 16px; flex: 0 0 auto; }

.page-jump__btn--up svg { transform: rotate(180deg); }

@media (max-width: 640px) {
  .page-jump { right: 14px; bottom: 14px; width: 92px; }

  .page-jump__btn { gap: 7px; min-height: 44px; padding: 0 12px; font-size: 13px; }
  .page-jump__btn svg { width: 15px; height: 15px; }
}



/* ============ 滚动叙事：#showcase 钉屏分步（2026-10-03 B 档） ============
   结构 = .scrolly（grid：左钉屏舞台 / 右步骤流）
        .scrolly__stage > .scrolly__phone   position:sticky 负责钉住
        .scrolly__steps > .scrolly__step   每条 min-height 撑出行程
   场景切换由 main.js 第 7 段按滚动进度写 data-scene（0/1/2）。
   降级链：① 无 JS ⇒ <noscript> 列表 ② prefers-reduced-motion ⇒ 取消钉住与位移
   ③ @supports not (animation-timeline) ⇒ 用 IO 类名切换（同一套类名） */
.scrolly {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(40px, 5vw, 96px);
  align-items: start;
  margin-top: clamp(36px, 4vw, 56px);
}
.scrolly__stage {
  position: sticky;
  top: calc(var(--header-h) + 40px);
  display: grid;
  place-items: center;
  padding: 22px 0;
}
.scrolly__phone { width: min(336px, 100%); }

/* 三屏场景叠放：绝对定位同槽，靠 opacity/transform 交叉过渡 */
.scrolly__scenes {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
}
.scene {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(10px) scale(.985);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
  pointer-events: none;
}
.scene.is-active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.scene__photo {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}
.scene__photo img { width: 100%; height: 100%; object-fit: cover; }

.chips--tight { gap: 8px; }
.scene .chip--mint  { background: #10283A; color: #7FE3D5; }
.scene .chip--sky   { background: #102234; color: #9CD4FF; }
.scene .chip--amber { background: #33261A; color: #FFCB84; }
.chips--tight .chip { padding: 6px 12px; font-size: 12px; }

.scrolly__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.scrolly__step {
  min-height: 78vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  opacity: .42;
  transition: opacity .45s var(--ease);
}
.scrolly__step:last-child { border-bottom: 1px solid var(--line); }
.scrolly__step.is-active { opacity: 1; }

.scrolly__num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--mint);
}
.scrolly__title { font-size: clamp(21px, 2.1vw, 27px); font-weight: 700; line-height: 1.35; }
.scrolly__desc {
  font-size: clamp(15px, 1.1vw, 16.5px);
  color: var(--text-2);
  line-height: 1.85;
  max-width: 40em;
}
.scrolly__fallback {
  margin: clamp(32px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.scrolly__fallback li {
  padding: 18px 22px;
  border-radius: var(--radius-md);
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.8;
}
.scrolly__fallback strong { color: var(--text); font-weight: 600; }

/* ---- A 档：手机模型 3D 倾斜（跟随指针，纯 CSS 变量驱动） ---- */
@media (hover: hover) and (pointer: fine) {
  .js .hero__visual .phone {
    transform: perspective(900px)
               rotateX(var(--tilt-y, 0deg))
               rotateY(var(--tilt-x, 0deg))
               translateZ(0);
    transition: transform .5s var(--ease);
  }
  .js .hero__visual .phone.is-tilting { transition: transform .12s linear; }
}

@media (max-width: 900px) {
  .scrolly { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .scrolly__stage { position: static; padding: 0 0 8px; }
  .scrolly__phone { width: min(300px, 76vw); margin: 0 auto; }
  .scrolly__step { min-height: 0; opacity: 1; padding: 20px 0; }
  .scrolly__step.is-active { opacity: 1; }
  .scrolly__steps { gap: 0; }
  /* 单列下三屏必须同时可读：叠放槽位改成纵向流，每屏一张完整手机。
     之前只靠 JS 加 .is-active，结果另外两屏 opacity:0 直接消失 ——
     属性与选择器都"正确"，只有渲染结果是错的（同 featureGeom 那类缺陷）。 */
  .scrolly__scenes {
    display: flex;
    flex-direction: column;
    gap: 18px;
  }
  .scene {
    position: static;
    opacity: 1;
    transform: none;
    transition: none;
    pointer-events: auto;
  }
  .scene[aria-hidden="true"] { opacity: 1; }
}

@media (max-width: 640px) {
  .scrolly__phone { width: min(280px, 78vw); }
  .scrolly__title { font-size: 20px; }
  .scrolly__desc { font-size: 15px; }
}

/* 打印：钉屏与场景叠放全部失效，退化为步骤清单 */
@media print {
  .scrolly { display: block; }
  .scrolly__stage { position: static; display: none; }
  .scrolly__step { min-height: 0; opacity: 1; page-break-inside: avoid; }
  .scrolly__scenes { display: none; }
}

/* 降级：关闭钉住与位移动画，只保留内容可读 */
@media (prefers-reduced-motion: reduce) {
  .scrolly__stage { position: static; }
  .scrolly__step { min-height: 0; opacity: 1; }
  .scene { transition: none; transform: none; }
  .js .hero__visual .phone { transform: none; }
}


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


@media print {
  .site-header, .hero__visual, .nav-toggle { display: none; }

  .js .page-jump { display: none; }

  .hero::before, .hero::after { display: none; }
  body { background: #fff; color: #000; }
}