/* 悦泽健康官网 —— 样式表（零依赖，支持深浅主题与移动端） */
:root {
  --wrap: 1160px;
  --radius: 18px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
}
:root[data-theme="light"] {
  --bg: #f7f8f5;
  --bg-alt: #eef3f0;
  --surface: #ffffff;
  --surface-2: #f4f7f5;
  --ink: #17222b;
  --ink2: #5d6b76;
  --ink3: #8a98a1;
  --line: rgba(23, 34, 43, .11);
  --primary: #0f766e;
  --primary-dark: #0a5751;
  --on-primary: #ffffff;
  --soft: #e5f3f0;
  --soft-2: #f0f7f5;
  --warn: #b45309;
  --shadow: 0 14px 44px rgba(16, 66, 60, .09);
  --shadow-sm: 0 4px 18px rgba(16, 66, 60, .07);
}
:root[data-theme="dark"] {
  --bg: #0d1518;
  --bg-alt: #111e22;
  --surface: #162328;
  --surface-2: #1c2c31;
  --ink: #e9f2f0;
  --ink2: #a8b9bb;
  --ink3: #7d9093;
  --line: rgba(233, 242, 240, .13);
  --primary: #2dd4bf;
  --primary-dark: #5eead4;
  --on-primary: #05231f;
  --soft: rgba(45, 212, 191, .13);
  --soft-2: rgba(45, 212, 191, .07);
  --warn: #fbbf24;
  --shadow: 0 14px 44px rgba(0, 0, 0, .35);
  --shadow-sm: 0 4px 18px rgba(0, 0, 0, .25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background .25s, color .25s;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(var(--wrap), calc(100% - 48px)); margin-inline: auto; }
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.kicker { font-size: 11px; font-weight: 800; letter-spacing: .18em; color: var(--primary); margin-bottom: 14px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  border: 1px solid transparent; border-radius: 11px; cursor: pointer;
  font-family: inherit; font-weight: 700; font-size: 14px; line-height: 1.3;
  padding: 12px 22px; transition: transform .18s, box-shadow .18s, background .18s, border-color .18s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--primary); color: var(--on-primary); box-shadow: 0 8px 22px rgba(15, 118, 110, .22); }
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 12px 28px rgba(15, 118, 110, .3); }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--soft); }
.btn-sm { padding: 9px 16px; font-size: 13px; border-radius: 9px; }
.btn-lg { padding: 15px 26px; font-size: 15px; border-radius: 12px; }
.btn-block { display: flex; width: 100%; }
.icon-btn {
  width: 36px; height: 36px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  color: var(--ink2); cursor: pointer; transition: .18s;
}
.icon-btn:hover { color: var(--primary); border-color: var(--primary); }
.text-link { color: var(--primary); font-weight: 700; font-size: 14px; }
.text-link span { display: inline-block; transition: transform .2s; }
.text-link:hover span { transform: translateX(5px); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { height: 72px; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { height: 36px; width: 36px; object-fit: contain; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text b { font-size: 15px; font-weight: 800; letter-spacing: .01em; }
.brand-text small { font-size: 9.5px; color: var(--ink3); letter-spacing: .12em; }
.nav-links { display: flex; gap: 30px; margin-left: auto; }
.nav-links a { font-size: 14px; color: var(--ink2); font-weight: 600; transition: color .18s; }
.nav-links a:hover { color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 12px; }

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.06fr .94fr; gap: 44px;
  align-items: center; padding: 72px 0 88px; min-height: 620px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--soft); color: var(--primary); border: 1px solid color-mix(in srgb, var(--primary) 20%, transparent);
  font-size: 12px; font-weight: 700; padding: 7px 14px; border-radius: 999px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent); }
.hero h1 { font-size: clamp(36px, 4.4vw, 58px); line-height: 1.24; letter-spacing: -.02em; margin: 22px 0 20px; font-weight: 800; }
.hero h1 .hl { color: var(--primary); }
.lead { font-size: 16px; color: var(--ink2); max-width: 560px; margin: 0 0 30px; line-height: 1.9; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 26px; font-size: 12.5px; color: var(--ink2); }
.hero-meta i { width: 3px; height: 3px; border-radius: 50%; background: var(--ink3); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.hero-tags span { font-size: 11.5px; color: var(--ink2); background: var(--surface); border: 1px solid var(--line); padding: 5px 11px; border-radius: 7px; }

/* 手机示意图 */
.hero-visual { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 606px; }
.glow { position: absolute; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--primary) 20%, transparent), transparent 68%); filter: blur(12px); }
.phone {
  position: relative; width: 272px; height: 542px; border-radius: 38px;
  background: #101a1e; padding: 9px; box-shadow: 0 30px 70px rgba(0, 0, 0, .28), 0 0 0 1px rgba(255, 255, 255, .08) inset;
  border: 2px solid #2a3a40;
}
.phone-notch { position: absolute; top: 15px; left: 50%; transform: translateX(-50%); width: 82px; height: 16px; border-radius: 10px; background: #101a1e; z-index: 2; }
.phone-screen { height: 100%; border-radius: 30px; background: var(--surface); padding: 30px 14px 12px; overflow: hidden; color: var(--ink); }
.ph-top { display: flex; justify-content: space-between; align-items: center; }
.ph-title { font-size: 15px; font-weight: 800; }
.ph-avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--soft); color: var(--primary); display: grid; place-items: center; font-size: 11px; font-weight: 800; }
.ph-member { font-size: 10px; color: var(--ink2); margin: 5px 0 12px; }
.ph-card { background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 10px 11px; margin-bottom: 9px; }
.ph-card-h { display: flex; justify-content: space-between; align-items: center; font-size: 10.5px; }
.ph-card-h b { font-size: 11.5px; }
.ph-card-h span { color: var(--ink3); font-size: 9.5px; }
.ph-bp { display: flex; align-items: baseline; gap: 14px; margin-top: 6px; }
.ph-bp em { font-style: normal; font-size: 21px; font-weight: 800; color: var(--primary); }
.ph-bp small { font-size: 9px; color: var(--ink2); margin-left: 3px; }
.ph-ok { margin-left: auto; font-size: 9px; background: var(--soft); color: var(--primary); padding: 2px 7px; border-radius: 5px; }
.ph-legend { display: flex; gap: 10px; font-size: 8.5px; color: var(--ink2); }
.ph-legend span { display: inline-flex; align-items: center; gap: 4px; }
.ph-legend i { width: 7px; height: 3px; border-radius: 2px; display: inline-block; }
.ph-row { display: flex; justify-content: space-between; font-size: 10px; }
.ph-row b { font-size: 10.5px; }
.ph-row span { color: var(--ink3); }
.ph-nav { display: flex; justify-content: space-around; border-top: 1px solid var(--line); padding-top: 9px; margin-top: 10px; font-size: 9.5px; color: var(--ink3); }
.ph-nav .on { color: var(--primary); font-weight: 800; }
.float-card {
  position: absolute; display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 13px;
  padding: 11px 14px; box-shadow: var(--shadow); z-index: 3;
}
.float-card b { display: block; font-size: 12px; }
.float-card small { display: block; font-size: 10px; color: var(--ink2); }
.fc-ico { width: 30px; height: 30px; border-radius: 9px; background: var(--soft); color: var(--primary); display: grid; place-items: center; font-weight: 800; }
.fc-a { top: 92px; right: -6px; }
.fc-b { bottom: 84px; left: -10px; }
.visual-note { position: static; margin-top: 14px; font-size: 10.5px; color: var(--ink3); }

/* ---------- 信任条 ---------- */
.trust { border-block: 1px solid var(--line); background: var(--surface); }
.trust-inner { display: grid; grid-template-columns: repeat(4, 1fr); padding: 26px 0; }
.trust-item { text-align: center; border-right: 1px solid var(--line); }
.trust-item:last-child { border-right: 0; }
.trust-item b { display: block; font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: -.01em; }
.trust-item span { font-size: 12px; color: var(--ink2); }

/* ---------- 章节标题 ---------- */
.sec-head { max-width: 720px; margin-bottom: 46px; }
.sec-head h2 { font-size: clamp(27px, 3vw, 38px); line-height: 1.35; margin: 0 0 14px; letter-spacing: -.015em; font-weight: 800; }
.sec-head p { color: var(--ink2); font-size: 15px; margin: 0; }

/* ---------- 功能卡 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 22px 22px; box-shadow: var(--shadow-sm);
  transition: transform .22s, box-shadow .22s, border-color .22s;
}
.feature:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--primary) 35%, var(--line)); }
.f-ico { width: 44px; height: 44px; border-radius: 12px; background: var(--soft); color: var(--primary); display: grid; place-items: center; margin-bottom: 18px; }
.f-ico svg { width: 23px; height: 23px; }
.feature h3 { font-size: 16px; margin: 0 0 10px; font-weight: 800; }
.feature p { font-size: 13px; color: var(--ink2); margin: 0 0 16px; line-height: 1.85; }
.f-tag { display: inline-block; font-size: 11px; color: var(--primary); background: var(--soft-2); border-radius: 6px; padding: 4px 9px; font-weight: 600; }

/* ---------- 痛点 ---------- */
.pain-grid { display: grid; gap: 12px; }
.pain-row {
  display: grid; grid-template-columns: 1fr 32px 1fr; gap: 20px; align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px 24px;
}
.pain-q { font-size: 14.5px; color: var(--ink2); }
.pain-q span { color: var(--primary); font-weight: 800; font-size: 12px; margin-right: 10px; }
.pain-arrow { text-align: center; color: var(--primary); font-size: 20px; }
.pain-a { font-size: 13.5px; color: var(--ink2); border-left: 2px solid var(--primary); padding-left: 18px; }
.pain-a b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 3px; }

/* ---------- 趋势详解 ---------- */
.trend-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: center; }
.trend-copy h2 { font-size: clamp(26px, 2.8vw, 36px); margin: 0 0 16px; line-height: 1.35; }
.trend-copy > p { color: var(--ink2); font-size: 14.5px; }
.tick-list { list-style: none; padding: 0; margin: 22px 0 26px; }
.tick-list li { position: relative; padding-left: 26px; font-size: 14px; color: var(--ink2); margin-bottom: 11px; }
.tick-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 800; }
.trend-figure { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.fig-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.fig-head b { font-size: 14px; }
.fig-head span { font-size: 11.5px; color: var(--ink3); }
.fig-note { font-size: 11px; color: var(--ink3); margin: 6px 0 0; }

/* ---------- 流程 ---------- */
.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.flow-step { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 22px; }
.flow-step:not(:last-child)::after { content: "→"; position: absolute; right: -15px; top: 42px; color: var(--primary); font-size: 18px; z-index: 2; }
.flow-n { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: var(--on-primary); font-weight: 800; font-size: 14px; margin-bottom: 16px; }
.flow-step h3 { margin: 0 0 8px; font-size: 16px; }
.flow-step p { margin: 0; font-size: 13px; color: var(--ink2); }

/* ---------- 隐私 ---------- */
.privacy-card { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 48px; box-shadow: var(--shadow); }
.privacy-copy h2 { font-size: clamp(25px, 2.8vw, 34px); margin: 0 0 16px; }
.privacy-copy > p { font-size: 13.5px; color: var(--ink2); }
.privacy-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 24px 0; }
.privacy-list > div { display: flex; gap: 10px; align-items: flex-start; }
.privacy-list span { color: var(--primary); font-weight: 800; }
.privacy-list b { display: block; font-size: 13.5px; }
.privacy-list small { display: block; font-size: 11.5px; color: var(--ink2); line-height: 1.6; }
.privacy-note { font-size: 11.5px !important; color: var(--ink3) !important; border-top: 1px solid var(--line); padding-top: 14px; margin-bottom: 0 !important; }
.privacy-visual { color: var(--primary); display: grid; place-items: center; }

/* ---------- 下载 ---------- */
.dl-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 20px; align-items: start; }
.dl-card { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
.dl-main { border-color: color-mix(in srgb, var(--primary) 42%, var(--line)); box-shadow: var(--shadow); }
.dl-badge { position: absolute; top: -12px; right: 22px; background: var(--primary); color: var(--on-primary); font-size: 11px; font-weight: 800; padding: 5px 13px; border-radius: 999px; }
.dl-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.dl-head img { width: 58px; height: 58px; border-radius: 14px; object-fit: cover; background: var(--surface-2); }
.dl-head .dl-ico-debug { padding: 8px; }
.dl-head h3 { margin: 0; font-size: 20px; }
.dl-head h3 span { color: var(--primary); }
.dl-head p { margin: 2px 0 0; font-size: 12.5px; color: var(--ink2); }
.dl-facts { border-top: 1px solid var(--line); margin-bottom: 18px; }
.dl-facts > div { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 12.5px; }
.dl-facts span { color: var(--ink2); flex: none; }
.dl-facts b { font-weight: 700; text-align: right; word-break: break-all; }
.mono { font-family: Consolas, "Courier New", monospace; font-size: 11px; }
.dl-sha { background: var(--surface-2); border-radius: 10px; padding: 11px 13px; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.dl-sha > span { font-size: 11px; color: var(--ink2); flex: none; }
.dl-sha code { font-family: Consolas, "Courier New", monospace; font-size: 10.5px; color: var(--ink); word-break: break-all; flex: 1; line-height: 1.5; }
.copy-btn { flex: none; background: var(--surface); border: 1px solid var(--line); border-radius: 7px; padding: 5px 10px; font-size: 11px; color: var(--primary); cursor: pointer; font-family: inherit; }
.copy-btn:hover { border-color: var(--primary); }
.dl-tip { font-size: 11.5px; color: var(--ink3); margin: 12px 0 0; line-height: 1.7; }
.notice-box { margin-top: 34px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.notice-box h3 { margin: 0 0 20px; font-size: 17px; }
.notice-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.notice-grid b { font-size: 13.5px; color: var(--primary); }
.notice-grid p { font-size: 12.5px; color: var(--ink2); margin: 6px 0 0; line-height: 1.8; }

/* ---------- CTA ---------- */
.cta-card { display: grid; grid-template-columns: 1.4fr .6fr; gap: 30px; align-items: center; background: var(--primary); color: var(--on-primary); border-radius: 24px; padding: 48px; }
.cta-card .kicker { color: color-mix(in srgb, var(--on-primary) 75%, transparent); }
.cta-card h2 { font-size: clamp(25px, 2.8vw, 34px); margin: 0 0 12px; }
.cta-card p { font-size: 14px; opacity: .88; max-width: 620px; margin: 0 0 24px; }
.cta-card .btn { background: var(--on-primary); color: var(--primary); }
.cta-card .btn:hover { background: color-mix(in srgb, var(--on-primary) 88%, transparent); }
.cta-tags { display: grid; gap: 12px; }
.cta-tags span { border: 1px solid color-mix(in srgb, var(--on-primary) 40%, transparent); border-radius: 10px; padding: 10px 16px; font-size: 14px; font-weight: 700; text-align: center; }

/* ---------- 页脚 ---------- */
.footer { background: var(--surface); border-top: 1px solid var(--line); padding-top: 54px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1.3fr; gap: 46px; padding-bottom: 40px; }
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand .brand-mark { height: 40px; width: 40px; }
.footer-brand p { font-size: 12.5px; color: var(--ink2); max-width: 430px; line-height: 1.9; }
.footer-col { display: flex; flex-direction: column; gap: 9px; }
.footer-col h4 { font-size: 13.5px; margin: 0 0 6px; }
.footer-col a, .footer-col span { font-size: 12.5px; color: var(--ink2); }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--line); padding: 18px 0 26px; font-size: 11.5px; color: var(--ink3); }
.footer-bottom a:hover { color: var(--primary); }
.disclaimer { color: var(--warn); }

/* ---------- 揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { grid-template-columns: 1fr 1fr; }
  .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-step:not(:last-child)::after { display: none; }
  .notice-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; padding: 48px 0 60px; }
  .hero-visual { min-height: 606px; }
  .trend-layout, .privacy-card, .dl-grid, .cta-card { grid-template-columns: 1fr; }
  .privacy-card, .cta-card { padding: 32px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .wrap { width: min(var(--wrap), calc(100% - 32px)); }
  .section { padding: 64px 0; }
  .feature-grid, .flow-grid, .notice-grid, .trust-inner { grid-template-columns: 1fr; }
  .trust-item { border-right: 0; border-bottom: 1px solid var(--line); padding: 12px 0; }
  .trust-item:last-child { border-bottom: 0; }
  .pain-row { grid-template-columns: 1fr; gap: 8px; }
  .pain-arrow { display: none; }
  .pain-a { border-left: 0; border-top: 1px solid var(--line); padding: 10px 0 0; }
  .privacy-list { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  .fc-a, .fc-b { display: none; }
  .hero-visual { min-height: 596px; }
  .dl-facts > div { flex-direction: column; gap: 2px; }
  .dl-facts b { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}
@media print {
  .nav, .hero-visual, .footer-bottom a, .btn { display: none; }
  body { background: #fff; }
}
/* 语言切换（按浏览器语言自动选择，可手动覆盖） */
.lang-switch {
  height: 36px; min-width: 48px; padding: 0 10px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  color: var(--ink2); font-size: 12.5px; font-weight: 700; cursor: pointer; transition: .18s;
}
.lang-switch:hover { color: var(--primary); border-color: var(--primary); }
@media print { .lang-switch { display: none; } }