/* ============================================================
   安愈官网 · health.kkespoir.cc
   与 App 同一套设计语言：青瓷雾色 + 暖砂 + 月白
   ============================================================ */

:root {
  /* hero 意境图配色（深浅两套，见下方覆盖） */
  --sc-sky1:#DCEFF2; --sc-sky2:#E9F5F0; --sc-sky3:#CFE6DC;
  --sc-hill1:#BCDCD9; --sc-hill2:#A6CFC3; --sc-water:#BFDCD4;
  --sc-leaf:#8FC0A9; --sc-petal:#FDF3F6; --sc-core:#F2C879;
  --sc-moon:#FFFFFF; --sc-star:#FFFFFF; --sc-star-op:.7;
  --brand-50:#EDF4F2; --brand-100:#DAE9E5; --brand-200:#BCD7D0; --brand-300:#9BC2B8;
  --brand-400:#7FAAA0; --brand-500:#6F9E94; --brand-600:#5A8880; --brand-700:#476E67; --brand-800:#37544F;
  --sand-100:#F6EEE1; --sand-500:#C9A87C; --sand-700:#A6825A;
  --ink:#232B29; --ink-2:#4A5754; --ink-3:#7B8A86; --ink-4:#A9B5B1;
  --line:#E3E9E6; --line-soft:#EEF2F0;
  --bg:#F5F8F6; --bg-2:#EEF3F1; --surface:#FFFFFF;
  --glass:rgba(245,248,246,.86);
  --sh-1:0 1px 2px rgba(35,51,48,.05),0 2px 10px rgba(35,51,48,.05);
  --sh-2:0 2px 8px rgba(35,51,48,.06),0 14px 34px rgba(35,51,48,.09);
  --sh-3:0 10px 26px rgba(35,51,48,.10),0 30px 60px rgba(35,51,48,.13);
  --r-md:16px; --r-lg:22px; --r-xl:30px; --r-pill:999px;
  --serif:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
  --max:1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sc-sky1:#16283A; --sc-sky2:#1E3A46; --sc-sky3:#25454A;
    --sc-hill1:#1B3742; --sc-hill2:#1E4038; --sc-water:#12222C;
    --sc-leaf:#1D4038; --sc-petal:#E8D2DC; --sc-core:#D8B36A;
    --sc-moon:#E7F2EC; --sc-star:#CFEDE2; --sc-star-op:.85;
    --brand-50:#1B2A28; --brand-100:#223835; --brand-200:#2E4A46; --brand-300:#3F6159;
    --brand-400:#5E8B82; --brand-500:#7FB3A8; --brand-600:#93C3B8; --brand-700:#AED5CB; --brand-800:#C9E4DC;
    --sand-100:#2A241B; --sand-500:#C4A67E; --sand-700:#DCC6A2;
    --ink:#E7EFEC; --ink-2:#C2CFCB; --ink-3:#93A29E; --ink-4:#6C7A76;
    --line:#26332F; --line-soft:#1E2A27;
    --bg:#0E1614; --bg-2:#121D1A; --surface:#16211E;
    --glass:rgba(14,22,20,.86);
    --sh-1:0 1px 2px rgba(0,0,0,.3),0 2px 10px rgba(0,0,0,.26);
    --sh-2:0 2px 8px rgba(0,0,0,.36),0 14px 34px rgba(0,0,0,.32);
    --sh-3:0 10px 26px rgba(0,0,0,.44),0 30px 60px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"] {
  --sc-sky1:#16283A; --sc-sky2:#1E3A46; --sc-sky3:#25454A;
  --sc-hill1:#1B3742; --sc-hill2:#1E4038; --sc-water:#12222C;
  --sc-leaf:#1D4038; --sc-petal:#E8D2DC; --sc-core:#D8B36A;
  --sc-moon:#E7F2EC; --sc-star:#CFEDE2; --sc-star-op:.85;
  --brand-50:#1B2A28; --brand-100:#223835; --brand-200:#2E4A46; --brand-300:#3F6159;
  --brand-400:#5E8B82; --brand-500:#7FB3A8; --brand-600:#93C3B8; --brand-700:#AED5CB; --brand-800:#C9E4DC;
  --sand-100:#2A241B; --sand-500:#C4A67E; --sand-700:#DCC6A2;
  --ink:#E7EFEC; --ink-2:#C2CFCB; --ink-3:#93A29E; --ink-4:#6C7A76;
  --line:#26332F; --line-soft:#1E2A27;
  --bg:#0E1614; --bg-2:#121D1A; --surface:#16211E;
  --glass:rgba(14,22,20,.86);
  --sh-1:0 1px 2px rgba(0,0,0,.3),0 2px 10px rgba(0,0,0,.26);
  --sh-2:0 2px 8px rgba(0,0,0,.36),0 14px 34px rgba(0,0,0,.32);
  --sh-3:0 10px 26px rgba(0,0,0,.44),0 30px 60px rgba(0,0,0,.4);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:3px;border-radius:8px}

.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.serif{font-family:var(--serif)}

/* ---------- 顶栏 ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:var(--glass);backdrop-filter:blur(16px) saturate(1.3);
  border-bottom:1px solid transparent;transition:border-color .3s;
}
.nav.scrolled{border-bottom-color:var(--line)}
.nav-in{display:flex;align-items:center;gap:20px;height:64px;max-width:var(--max);margin:0 auto;padding:0 24px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo svg{width:32px;height:32px}
.logo b{font-family:var(--serif);font-size:20px;letter-spacing:.16em;color:var(--brand-700)}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:15px;color:var(--ink-2)}
.nav-links a{transition:color .2s}
.nav-links a:hover{color:var(--brand-600)}
.nav-cta{flex:0 0 auto}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--brand-400),var(--brand-600));color:#fff;box-shadow:0 6px 20px rgba(111,158,148,.34)}
.btn-primary:hover{box-shadow:0 10px 28px rgba(111,158,148,.44)}
.btn-ghost{background:var(--surface);color:var(--brand-700);border:1px solid var(--brand-200);box-shadow:var(--sh-1)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 76px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg svg{width:100%;height:100%;object-fit:cover}
.hero-fade{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(245,248,246,.1) 0%,rgba(245,248,246,.55) 55%,var(--bg) 100%)}
:root[data-theme="dark"] .hero-fade,
:root:not([data-theme="light"]) .hero-fade{background:linear-gradient(180deg,rgba(14,22,20,.2) 0%,rgba(14,22,20,.6) 55%,var(--bg) 100%)}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .hero-fade{background:linear-gradient(180deg,rgba(245,248,246,.1) 0%,rgba(245,248,246,.55) 55%,var(--bg) 100%)}}
.hero-in{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 15px;
  border-radius:var(--r-pill);background:var(--surface);box-shadow:var(--sh-1);
  font-size:13px;color:var(--brand-700);margin-bottom:22px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--brand-500);font-style:normal}
.hero h1{font-family:var(--serif);font-size:clamp(38px,5.4vw,62px);line-height:1.24;letter-spacing:.03em;font-weight:600}
.hero h1 em{font-style:normal;color:var(--brand-600)}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.95;color:var(--ink-2);max-width:30em}
.hero-acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-note{margin-top:16px;font-size:13px;color:var(--ink-3)}

/* 手机外框 */
.phone{
  position:relative;width:min(248px,64vw);margin:0 auto;
  border-radius:38px;padding:10px;background:linear-gradient(160deg,#2C3A37,#141D1B);
  box-shadow:var(--sh-3);
}
.phone::after{content:'';position:absolute;top:20px;left:50%;transform:translateX(-50%);width:88px;height:6px;border-radius:3px;background:rgba(255,255,255,.16)}
.phone img{border-radius:30px;width:100%;height:auto;display:block}
.phone-stack{position:relative;padding-left:66px}
.phone-stack .phone.back{
  position:absolute;top:24px;left:0;width:min(198px,52vw);
  transform:rotate(-7deg) scale(.94);opacity:.92;filter:saturate(.96);z-index:0;
}
.phone-stack .phone.front{position:relative;z-index:1}

/* ---------- 通用 section ---------- */
.sec{padding:88px 0}
.sec-alt{background:var(--bg-2)}
.sec-head{text-align:center;max-width:640px;margin:0 auto 52px}
.sec-eyebrow{font-size:13px;letter-spacing:.22em;color:var(--brand-600);text-transform:uppercase;margin-bottom:12px}
.sec-head h2{font-family:var(--serif);font-size:clamp(28px,3.6vw,40px);line-height:1.4;letter-spacing:.03em;font-weight:600}
.sec-head p{margin-top:14px;font-size:16px;color:var(--ink-3);line-height:1.9}

/* ---------- 共鸣 ---------- */
.pains{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pain{
  padding:26px 22px;border-radius:var(--r-lg);background:var(--surface);
  box-shadow:var(--sh-1);text-align:center;
}
.pain span{font-size:30px;display:block;margin-bottom:10px}
.pain b{display:block;font-size:16px;margin-bottom:6px}
.pain p{font-size:14px;color:var(--ink-3);line-height:1.75}

/* ---------- 功能卡 ---------- */
.feats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{
  background:var(--surface);border-radius:var(--r-xl);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.feat:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.feat-shot{
  background:linear-gradient(180deg,var(--brand-50),var(--bg-2));
  height:228px;padding:26px 26px 0;display:flex;justify-content:center;overflow:hidden;
}
.feat-shot img{
  width:186px;height:100%;object-fit:cover;object-position:top center;
  border-radius:16px 16px 0 0;box-shadow:0 -2px 22px rgba(35,51,48,.14);
}
.feat-txt{padding:24px 26px 28px}
.feat-txt h3{font-family:var(--serif);font-size:21px;letter-spacing:.03em;margin-bottom:8px}
.feat-txt p{font-size:15px;color:var(--ink-3);line-height:1.85}

/* ---------- 差异化 ---------- */
.diffs{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.diff{
  display:flex;gap:16px;padding:26px;border-radius:var(--r-lg);
  background:var(--surface);box-shadow:var(--sh-1);
}
.diff-ico{
  flex:0 0 auto;width:46px;height:46px;border-radius:14px;
  background:var(--brand-50);color:var(--brand-600);
  display:grid;place-items:center;
}
.diff-ico svg{width:24px;height:24px}
.diff b{display:block;font-size:17px;margin-bottom:6px}
.diff p{font-size:14.5px;color:var(--ink-3);line-height:1.8}

/* ---------- 数字 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat b{display:block;font-family:var(--serif);font-size:clamp(34px,4.6vw,50px);color:var(--brand-600);line-height:1.15}
.stat span{font-size:14px;color:var(--ink-3)}

/* ---------- 画廊 ---------- */
.gallery{display:flex;gap:20px;overflow-x:auto;padding:6px 24px 24px;scroll-snap-type:x proximity;scrollbar-width:none}
.gallery::-webkit-scrollbar{display:none}
.gallery figure{flex:0 0 auto;width:216px;scroll-snap-align:center;text-align:center}
.gallery img{border-radius:18px;box-shadow:var(--sh-2);width:100%;aspect-ratio:9/19.5;object-fit:cover;object-position:top center;background:var(--bg-2)}
.gallery figcaption{margin-top:12px;font-size:14px;color:var(--ink-3)}

/* ---------- CTA ---------- */
.cta{position:relative;overflow:hidden;padding:92px 0;text-align:center}
.cta-bg{position:absolute;inset:0;z-index:0;opacity:.55}
.cta-in{position:relative;z-index:2}
.cta h2{font-family:var(--serif);font-size:clamp(30px,4vw,44px);letter-spacing:.04em;line-height:1.4}
.cta p{margin-top:14px;font-size:16px;color:var(--ink-2)}
.cta-acts{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:30px}
.cta-meta{margin-top:16px;font-size:13px;color:var(--ink-3)}

/* ---------- FAQ ---------- */
.faq{max-width:760px;margin:0 auto}
.faq details{
  border-radius:var(--r-md);background:var(--surface);box-shadow:var(--sh-1);
  margin-bottom:12px;overflow:hidden;
}
.faq summary{
  padding:20px 24px;font-size:16.5px;font-weight:600;cursor:pointer;
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-size:22px;color:var(--brand-500);flex:0 0 auto;transition:transform .25s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 24px 22px;font-size:15px;color:var(--ink-3);line-height:1.9}

/* ---------- 免责 ---------- */
.notice{
  max-width:820px;margin:0 auto;padding:26px 28px;border-radius:var(--r-lg);
  background:var(--sand-100);border:1px solid rgba(201,168,124,.3);
}
.notice b{color:var(--sand-700)}
.notice p{font-size:14.5px;color:var(--ink-2);line-height:1.9}

/* ---------- 页脚 ---------- */
.foot{border-top:1px solid var(--line);padding:44px 0 56px;background:var(--bg-2)}
.foot-in{display:flex;flex-wrap:wrap;gap:28px;align-items:flex-start;justify-content:space-between}
.foot-brand{display:flex;align-items:center;gap:10px}
.foot-brand svg{width:28px;height:28px}
.foot-brand b{font-family:var(--serif);font-size:18px;letter-spacing:.16em;color:var(--brand-700)}
.foot p{font-size:13.5px;color:var(--ink-3);margin-top:10px;line-height:1.85}
.foot-links{display:flex;gap:22px;font-size:14px;color:var(--ink-3);flex-wrap:wrap}
.foot-links a:hover{color:var(--brand-600)}
.foot-bottom{margin-top:30px;padding-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-4);text-align:center}

/* ---------- 滚动揭示 ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}

/* ---------- 主题切换 ---------- */
.theme-btn{
  width:38px;height:38px;border-radius:var(--r-pill);display:grid;place-items:center;
  color:var(--ink-3);transition:background .2s,color .2s;
}
.theme-btn:hover{background:var(--bg-2);color:var(--brand-600)}
.theme-btn svg{width:19px;height:19px}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .hero-in{grid-template-columns:1fr;gap:48px;text-align:center}
  .hero-sub{margin-left:auto;margin-right:auto}
  .hero-acts{justify-content:center}
  .phone-stack .phone.back{left:-56px;width:min(200px,52vw)}
  .feats{grid-template-columns:repeat(2,1fr)}
  .pains{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:640px){
  .sec{padding:64px 0}
  .hero{padding:52px 0 68px}
  .feats,.diffs{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px}
  .phone-stack .phone.back{display:none}
  .phone-stack{padding-left:0}
  .wrap{padding:0 18px}
  .nav-in{padding:0 18px;gap:12px}
}

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