/**
 * 神伞官网 · 暗森林视觉
 * 深苔绿底、林隙金光点缀；简洁高雅，兼顾移动端阅读。
 */

:root {
  --bg-deep: #07110d;
  --bg-forest: #0c1a14;
  --bg-panel: #12241c;
  --bg-panel-2: #183028;
  --moss: #2f6b52;
  --moss-soft: #3d8a68;
  --leaf: #7eb89a;
  --mist: #a8c9b8;
  --gold: #c4a574;
  --gold-bright: #dfc396;
  --ink: #e8f0eb;
  --ink-dim: #9bb3a6;
  --line: rgba(126, 184, 154, 0.18);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --font-display: "Cormorant Garamond", "Noto Serif SC", "Songti SC", serif;
  --font-body: "Sora", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max: 1120px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background:
    radial-gradient(ellipse 90% 60% at 15% -10%, rgba(47, 107, 82, 0.35), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 10%, rgba(196, 165, 116, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-forest) 45%, #0a1611 100%);
  background-attachment: fixed;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--gold-bright);
  text-decoration: none;
  transition: color 0.25s ease, opacity 0.25s ease;
}

a:hover {
  color: #f0e2c4;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gold);
  color: #111;
  padding: 0.5rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  backdrop-filter: blur(16px);
  background: rgba(7, 17, 13, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  height: 100%;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.brand__mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand__en {
  display: block;
  font-family: var(--font-body);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-top: -0.15rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.nav a {
  color: var(--mist);
  font-size: 0.92rem;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.3s ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink);
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  width: 100%;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--moss-soft), var(--moss));
  color: #f4fff8 !important;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(47, 107, 82, 0.35);
}

.header-cta:hover {
  filter: brightness(1.08);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 4px auto;
  background: var(--mist);
}

/* ---------- Layout ---------- */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 5rem 0;
}

.section--tight {
  padding: 3.5rem 0;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.85rem;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 1rem;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.45rem);
}

h3 {
  font-size: 1.25rem;
  color: var(--gold-bright);
}

.lead {
  font-size: 1.08rem;
  color: var(--mist);
  max-width: 38rem;
}

.muted {
  color: var(--ink-dim);
}

/* ---------- Buttons ---------- */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 48px;
  padding: 0.7rem 1.35rem;
  border-radius: 12px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  color: #1a140c !important;
  box-shadow: 0 10px 28px rgba(196, 165, 116, 0.28);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink) !important;
}

.btn--ghost:hover {
  border-color: var(--leaf);
  color: var(--leaf) !important;
}

.btn--moss {
  background: linear-gradient(135deg, var(--moss-soft), #245844);
  color: #f3fff8 !important;
}

/* ---------- Promo ribbon ---------- */
.promo {
  border-block: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(196, 165, 116, 0.08), rgba(47, 107, 82, 0.18), rgba(196, 165, 116, 0.08));
}

.promo__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.promo__badge {
  flex-shrink: 0;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgba(196, 165, 116, 0.18);
  color: var(--gold-bright);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

.promo__text {
  margin: 0;
  color: var(--mist);
  font-size: 0.95rem;
}

.promo__text strong {
  color: var(--gold-bright);
  font-weight: 600;
}

/* 页脚上方会员折扣条：与顶部 promo 同色，略增内边距便于阅读 */
.promo--footer {
  margin-top: 0;
  border-bottom: 0;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.hero__canvas svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__content {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4.5rem 1.25rem 5rem;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, 0.95fr);
  gap: 2rem 2.5rem;
  align-items: center;
}

.hero__copy {
  min-width: 0;
}

.hero__brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  letter-spacing: 0.06em;
  margin: 0 0 0.35rem;
  background: linear-gradient(120deg, #f4fff8 10%, var(--gold-bright) 55%, var(--leaf) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: brand-glow 6s ease-in-out infinite;
}

.hero__sub {
  margin: 0 0 1.4rem;
  color: var(--ink-dim);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.hero h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 500;
  color: var(--ink);
  max-width: 22em;
  margin-bottom: 0.9rem;
}

.hero .lead {
  margin: 0;
}

/* ---------- Hero 右侧：视力守护卡通线条动画 ---------- */
.hero__demo {
  justify-self: end;
  width: min(100%, 380px);
}

.vision-demo {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
}

.vision-demo__svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.vd-caption {
  fill: #9bb3a6;
  font-size: 13px;
  letter-spacing: 0.22em;
  font-family: var(--font-body);
}

.vd-warn-text,
.vd-ok-text,
.vd-stage {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.vd-warn-text {
  fill: #dfc396;
  font-size: 13px;
  font-weight: 600;
}

.vd-ok-text {
  fill: #7eb89a;
  font-size: 14px;
  font-weight: 600;
}

.vd-stage {
  fill: #9bb3a6;
  font-size: 13px;
  letter-spacing: 0.04em;
}

/*
 * 循环约 8 秒：
 * 0–35% 手机贴近 + 警示
 * 35–55% 手机拉远过渡
 * 55–88% 健康距离 + OK
 * 88–100% 回到贴近前准备
 */
.vd-phone {
  transform-box: view-box;
  transform-origin: 0 0;
  transform: translate(180px, 188px) scale(1.08);
  animation: vd-phone-move 8s ease-in-out infinite;
}

.vd-warn {
  opacity: 0;
  animation: vd-warn-cycle 8s ease-in-out infinite;
}

.vd-ok {
  opacity: 0;
  animation: vd-ok-cycle 8s ease-in-out infinite;
}

.vd-eyes-near,
.vd-mouth-near,
.vd-stage-near {
  animation: vd-near-vis 8s ease-in-out infinite;
}

.vd-eyes-ok,
.vd-mouth-ok,
.vd-stage-ok {
  opacity: 0;
  animation: vd-ok-vis 8s ease-in-out infinite;
}

.vd-arc {
  stroke-dashoffset: 0;
  animation: vd-arc-dash 8s linear infinite;
}

@keyframes vd-phone-move {
  /* 贴近脸部（略上移、靠近画面中心） */
  0%,
  30% {
    transform: translate(180px, 188px) scale(1.08);
  }
  /* 拉远到健康距离 */
  50%,
  85% {
    transform: translate(180px, 268px) scale(0.92);
  }
  100% {
    transform: translate(180px, 188px) scale(1.08);
  }
}

@keyframes vd-warn-cycle {
  0%,
  8% {
    opacity: 0;
    transform: translateY(6px);
  }
  16%,
  32% {
    opacity: 1;
    transform: translateY(0);
  }
  40%,
  100% {
    opacity: 0;
    transform: translateY(-4px);
  }
}

@keyframes vd-ok-cycle {
  0%,
  48% {
    opacity: 0;
  }
  58%,
  85% {
    opacity: 1;
  }
  94%,
  100% {
    opacity: 0;
  }
}

@keyframes vd-near-vis {
  0%,
  38% {
    opacity: 1;
  }
  48%,
  90% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

@keyframes vd-ok-vis {
  0%,
  48% {
    opacity: 0;
  }
  58%,
  88% {
    opacity: 1;
  }
  96%,
  100% {
    opacity: 0;
  }
}

@keyframes vd-arc-dash {
  0%,
  50% {
    stroke-dashoffset: 24;
  }
  60%,
  85% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: 24;
  }
}

@keyframes brand-glow {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.08);
  }
}

@keyframes mist-drift {
  0% {
    transform: translateX(0);
    opacity: 0.35;
  }
  50% {
    transform: translateX(18px);
    opacity: 0.55;
  }
  100% {
    transform: translateX(0);
    opacity: 0.35;
  }
}

@keyframes shaft-pulse {
  0%,
  100% {
    opacity: 0.25;
  }
  50% {
    opacity: 0.45;
  }
}

.mist-layer {
  animation: mist-drift 14s ease-in-out infinite;
}

.light-shaft {
  animation: shaft-pulse 8s ease-in-out infinite;
}

/* ---------- Feature grid ---------- */
.section-head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
}

.feature {
  padding: 1.45rem 1.35rem 1.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(24, 48, 40, 0.9), rgba(12, 26, 20, 0.75));
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.feature:hover {
  border-color: rgba(196, 165, 116, 0.45);
  transform: translateY(-3px);
}

.feature__icon {
  width: 42px;
  height: 42px;
  margin-bottom: 0.9rem;
  color: var(--leaf);
}

.feature p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.94rem;
}

/* ---------- Scene blocks ---------- */
.scene {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.scene--reverse {
  grid-template-columns: 0.95fr 1.05fr;
}

.scene--reverse .scene__copy {
  order: 2;
}

.scene--reverse .scene__visual {
  order: 1;
}

.scene__visual {
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--bg-panel);
  min-height: 280px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.scene__visual svg {
  width: 100%;
  height: 100%;
  min-height: 280px;
}

.bullet-list {
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}

.bullet-list li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.55rem;
  color: var(--mist);
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- Steps / FAQ / Download ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  counter-reset: step;
}

.step {
  padding: 1.4rem;
  border-radius: var(--radius);
  background: rgba(18, 36, 28, 0.8);
  border: 1px solid var(--line);
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.faq {
  display: grid;
  gap: 0.75rem;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(18, 36, 28, 0.65);
  padding: 1rem 1.2rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq details[open] summary {
  color: var(--gold-bright);
  margin-bottom: 0.55rem;
}

.faq p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.95rem;
}

/* Download cards */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.download-card {
  display: flex;
  flex-direction: column;
  padding: 1.6rem 1.45rem;
  border-radius: 20px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at top right, rgba(196, 165, 116, 0.12), transparent 45%),
    linear-gradient(165deg, #163226, #0e1c16);
  min-height: 100%;
}

.download-card__tag {
  align-self: flex-start;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.7rem;
}

.download-card h3 {
  margin-bottom: 0.55rem;
}

.download-card p {
  color: var(--ink-dim);
  font-size: 0.94rem;
  flex: 1;
  margin: 0 0 1.25rem;
}

.download-card .btn {
  width: 100%;
}

/* 家长端 / 孩子端扫码下载区 */
.download-qr-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem; /* 码与提示分行，避免文字叠在二维码上 */
  margin: 0 0 1.1rem;
  padding: 1rem 0.75rem 0.95rem;
  border-radius: 14px;
  border: 1px dashed rgba(196, 165, 116, 0.35);
  background: rgba(7, 17, 13, 0.35);
}

.download-qr {
  /* padding 计入尺寸，防止 148 画布 + 8 边距撑破容器盖住下方文字 */
  box-sizing: border-box;
  width: 164px;
  height: 164px;
  padding: 8px;
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 12px;
  background: #f4fff8;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

.download-qr img,
.download-qr canvas,
.download-qr table {
  display: block;
  width: 148px !important;
  height: 148px !important;
  max-width: 100%;
  margin: 0 auto;
  border-radius: 4px;
}

.download-qr__hint {
  margin: 0;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  max-width: 100%;
  text-align: center;
  line-height: 1.45;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--gold-bright);
}

.download-note {
  margin-top: 1.5rem;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--gold);
  background: rgba(196, 165, 116, 0.08);
  color: var(--mist);
  font-size: 0.92rem;
}

/* Contact */
.contact-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
}

.contact-box,
.contact-aside {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 36, 28, 0.75);
  padding: 1.6rem;
}

.contact-item {
  margin-bottom: 1.2rem;
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-item dt {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.25rem;
}

.contact-item dd {
  margin: 0;
  font-size: 1.05rem;
}

.copy-btn {
  margin-left: 0.5rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  border-radius: 8px;
  padding: 0.15rem 0.55rem;
  font-size: 0.78rem;
  cursor: pointer;
}

.copy-btn:hover {
  border-color: var(--gold);
  color: var(--gold-bright);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%) translateY(120%);
  background: #1d3a2d;
  color: var(--ink);
  border: 1px solid var(--leaf);
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  z-index: 200;
}

.toast.is-show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 2rem;
  margin-top: 2rem;
  background: rgba(0, 0, 0, 0.25);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.8rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-links a {
  color: var(--mist);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  color: var(--ink-dim);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
}

/* Page hero (inner pages) */
.page-hero {
  padding: 3.5rem 0 2rem;
}

.page-hero h1 {
  margin-bottom: 0.6rem;
}

/* ---------- 法律文档页（隐私政策等） ---------- */
.legal-page {
  padding: 3rem 0 4rem;
}

.legal-page__inner {
  max-width: 760px;
}

.legal-page__head {
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.legal-page__head h1 {
  font-size: clamp(1.65rem, 3vw, 2.2rem);
  margin-bottom: 0.55rem;
}

.legal-meta {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.legal-body {
  color: var(--mist);
  font-size: 0.98rem;
  line-height: 1.85;
}

.legal-body h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  color: var(--gold-bright);
}

.legal-body p {
  margin: 0 0 1rem;
}

.legal-body ol {
  margin: 0 0 1.1rem;
  padding-left: 1.25rem;
}

.legal-body li {
  margin-bottom: 0.65rem;
}

.legal-body strong {
  color: var(--ink);
  font-weight: 600;
}

.legal-identity {
  padding: 0.95rem 1.1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(18, 36, 28, 0.65);
  color: var(--mist);
  font-size: 0.94rem;
}

.legal-back {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

/* Mobile */
@media (max-width: 960px) {
  .feature-grid,
  .download-grid,
  .steps,
  .scene,
  .scene--reverse,
  .contact-panel,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .scene--reverse .scene__copy,
  .scene--reverse .scene__visual {
    order: initial;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(7, 17, 13, 0.96);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 0;
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 1.25rem;
  }

  .nav a::after {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

  .hero {
    min-height: auto;
  }

  .hero__content {
    grid-template-columns: 1fr;
    padding-top: 3rem;
    padding-bottom: 3.5rem;
    gap: 1.75rem;
  }

  .hero__demo {
    justify-self: center;
    width: min(100%, 340px);
    order: 2;
  }

  .hero__copy {
    order: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  /* 减弱动效时固定展示「健康距离」静态帧，避免空白 */
  .vd-phone {
    transform: translate(180px, 268px) scale(0.92) !important;
  }

  .vd-ok,
  .vd-eyes-ok,
  .vd-mouth-ok,
  .vd-stage-ok {
    opacity: 1 !important;
  }

  .vd-warn,
  .vd-eyes-near,
  .vd-mouth-near,
  .vd-stage-near {
    opacity: 0 !important;
  }
}

/* ---------- ��������վ�������л������ ---------- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(18, 36, 28, 0.7);
  margin-left: 0.75rem;
}

.lang-switch__label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 0 0.45rem 0 0.65rem;
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-btn:hover { color: var(--ink); }

.lang-btn.is-active {
  background: linear-gradient(135deg, var(--moss-soft), var(--moss));
  color: #f4fff8;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 1.75rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(18, 36, 28, 0.65);
  color: var(--mist);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.privacy-note-card {
  margin-top: 2rem;
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid rgba(196, 165, 116, 0.28);
  background: linear-gradient(135deg, rgba(196, 165, 116, 0.1), rgba(47, 107, 82, 0.18));
}

.privacy-note-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--gold-bright);
}

.privacy-note-card p {
  margin: 0;
  color: var(--ink-dim);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 860px) {
  .lang-switch__label { display: none; }
  .header-tools { margin-left: auto; }
}