/* ============ 设计系统：温暖风格 ============ */
:root{
  --cream:#FFF7F1;
  --cream-2:#FDEEE4;
  --white:#FFFFFF;
  --coral:#F0806A;
  --coral-deep:#E2684F;
  --rose:#F6BFC9;
  --rose-soft:#FBE2D6;
  --gold:#F4A259;
  --ink:#4A3B36;
  --ink-soft:#7A6A63;
  --line:#F0DED3;
  --shadow:0 18px 40px -20px rgba(226,104,79,.35);
  --shadow-sm:0 8px 22px -12px rgba(74,59,54,.25);
  --radius:22px;
  --radius-sm:14px;
  --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--font);color:var(--ink);background:var(--cream);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ============ 通用 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:1.5px solid transparent;transition:.25s ease}
.btn--primary{background:linear-gradient(135deg,#F89A82,var(--coral-deep));color:#fff;box-shadow:var(--shadow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 22px 46px -18px rgba(226,104,79,.5)}
.btn--ghost{background:var(--white);color:var(--coral-deep);border-color:var(--rose)}
.btn--ghost:hover{background:var(--rose-soft)}

.pill{display:inline-block;padding:6px 14px;border-radius:999px;background:var(--rose-soft);color:var(--coral-deep);font-size:13px;font-weight:600;letter-spacing:.3px}
.pill--rose{background:#FCE4EA}
.pill--gold{background:#FCEBD6;color:#C9742A}

.sec-head{text-align:center;max-width:640px;margin:0 auto 48px}
.sec-head h2{font-size:clamp(26px,4vw,38px);margin:14px 0 10px;letter-spacing:-.5px}
.sec-head p{color:var(--ink-soft)}

.section{padding:84px 0}
.section--soft{background:linear-gradient(180deg,var(--cream),var(--cream-2))}

.link{display:inline-block;margin-top:14px;color:var(--coral-deep);font-weight:600}
.link:hover{text-decoration:underline}

/* ============ 导航 ============ */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,247,241,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand__mark{display:grid;place-items:center}
.brand__name{font-size:20px;letter-spacing:.5px;color:var(--ink)}
.nav__links{display:flex;align-items:center;gap:26px}
.nav__links a{font-size:15px;color:var(--ink-soft);font-weight:500;transition:.2s}
.nav__links a:hover{color:var(--coral-deep)}
.nav__cta{color:var(--coral-deep)!important;padding:9px 18px}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.3s}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:70px 0 60px;background:radial-gradient(120% 120% at 80% 0%,#FFE6D6 0%,var(--cream) 55%)}
.hero__blob{position:absolute;border-radius:50%;filter:blur(8px);opacity:.55;z-index:0}
.hero__blob--1{width:340px;height:340px;background:radial-gradient(circle,#FFD0BC,transparent 70%);top:-90px;right:-60px}
.hero__blob--2{width:260px;height:260px;background:radial-gradient(circle,#FBE0C9,transparent 70%);bottom:-80px;left:-40px}
.hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero__text h1{font-size:clamp(32px,5vw,52px);line-height:1.18;margin:16px 0;letter-spacing:-1px}
.hero__sub{font-size:17px;color:var(--ink-soft);max-width:480px}
.hero__actions{display:flex;gap:14px;margin:26px 0 14px;flex-wrap:wrap}
.hero__note{font-size:13px;color:var(--ink-soft)}

.hero__art{display:grid;place-items:center}
.art-card{position:relative;width:300px;height:300px;background:var(--white);border-radius:30px;box-shadow:var(--shadow);display:grid;place-items:center}
.art-card .ring{position:relative}
.ring__num{font-size:30px;font-weight:800;fill:var(--coral-deep)}
.ring__lab{font-size:12px;fill:var(--ink-soft)}
.chip{position:absolute;background:var(--white);border:1px solid var(--line);padding:8px 13px;border-radius:999px;font-size:13px;font-weight:600;box-shadow:var(--shadow-sm);animation:float 4s ease-in-out infinite}
.chip--1{top:18px;left:-30px}
.chip--2{bottom:34px;right:-36px;animation-delay:.8s}
.chip--3{bottom:8px;left:6px;animation-delay:1.6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* ============ 数据 ============ */
.stats{padding:18px 0 64px}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 22px;box-shadow:var(--shadow-sm)}
.stat{text-align:center}
.stat__num{font-size:clamp(28px,4vw,40px);font-weight:800;color:var(--coral-deep);line-height:1}
.stat__num small{font-size:18px}
.stat__lab{display:block;margin-top:8px;color:var(--ink-soft);font-size:14px}
.stats__foot{text-align:center;font-size:12px;color:var(--ink-soft);margin-top:14px}

/* ============ 核心能力 ============ */
.feat{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:64px}
.feat--rev .feat__art{order:2}
.feat__art{background:linear-gradient(135deg,#FFF1E9,#FDE0D2);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);display:grid;place-items:center}
.feat__text h3{font-size:24px;margin-bottom:10px}
.feat__text p{color:var(--ink-soft);margin-bottom:14px}
.ticks{list-style:none;display:grid;gap:10px}
.ticks li{position:relative;padding-left:28px;color:var(--ink)}
.ticks li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;background:var(--rose-soft);color:var(--coral-deep);border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700}

.care-note{background:linear-gradient(135deg,#FFF1E9,#FCE4EA);border:1px solid var(--rose);border-radius:var(--radius-sm);padding:16px 18px;margin:18px 0}
.care-note strong{display:block;color:var(--coral-deep);margin-bottom:6px;font-size:15px}
.care-note p{color:var(--ink-soft);font-size:14px;margin:0;line-height:1.65}

/* ============ 技术原理 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow-sm);text-align:center}
.step__no{width:46px;height:46px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,#F89A82,var(--coral-deep));color:#fff;font-weight:800;font-size:20px;display:grid;place-items:center}
.step h4{margin-bottom:6px}
.step p{color:var(--ink-soft);font-size:14px}

/* ============ 技术实力 ============ */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;box-shadow:var(--shadow-sm);transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card__ic{font-size:30px;margin-bottom:10px}
.card h4{margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:14px}

/* ============ 关于 ============ */
.about{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.about__text h2{font-size:clamp(24px,3.4vw,34px);margin:14px 0 16px}
.about__text p{color:var(--ink-soft);margin-bottom:12px}
.about__cards{display:grid;gap:16px}
.about__item{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 22px;box-shadow:var(--shadow-sm)}
.about__item strong{display:block;color:var(--coral-deep);margin-bottom:6px}
.about__item span{color:var(--ink-soft);font-size:15px}

/* ============ 下载 ============ */
.download{background:radial-gradient(120% 140% at 50% 0%,#FFE2D2,var(--coral) 130%);color:#fff}
.download__inner{text-align:center;max-width:640px;margin:0 auto}
.download__inner h2{font-size:clamp(26px,4vw,38px);margin-bottom:10px}
.download__inner p{opacity:.92}
.stores{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:28px 0 12px}
.store{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.4);color:#fff;padding:13px 22px;border-radius:999px;font-weight:600;transition:.25s;backdrop-filter:blur(4px)}
.store:hover{background:rgba(255,255,255,.28);transform:translateY(-2px)}
.download__qr{font-size:13px;opacity:.85}

/* ============ FAQ ============ */
.faq{max-width:760px;margin:0 auto;display:grid;gap:14px}
.faq__item{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 22px;box-shadow:var(--shadow-sm);cursor:pointer}
.faq__item summary{font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq__item summary::after{content:"+";font-size:22px;color:var(--coral-deep);transition:.2s}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__item p{margin-top:12px;color:var(--ink-soft);font-size:15px}

/* ============ 新闻 ============ */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news__card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);transition:.25s}
.news__card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news__tag{display:inline-block;background:var(--rose-soft);color:var(--coral-deep);font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;margin-bottom:12px}
.news__card h4{margin-bottom:8px;font-size:17px}
.news__card p{color:var(--ink-soft);font-size:14px;margin-bottom:12px}
.news__card time{font-size:13px;color:var(--ink-soft)}

/* ============ 联系 ============ */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact__intro h2{font-size:clamp(24px,3.4vw,34px);margin:14px 0 12px}
.contact__intro p{color:var(--ink-soft);margin-bottom:18px}
.contact__info{list-style:none;display:grid;gap:10px;color:var(--ink-soft)}
.contact__form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);font-size:15px;font-family:inherit;color:var(--ink);background:var(--cream);transition:.2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--coral);background:#fff}
.agree{display:flex;align-items:flex-start;gap:9px;font-size:13px;color:var(--ink-soft);margin-bottom:18px}
.agree input{margin-top:4px}
.form__hint{margin-top:12px;color:var(--coral-deep);font-weight:600;font-size:14px}

/* ============ 页脚 ============ */
.footer{background:var(--ink);color:#EAD9CF;padding:54px 0 0}
.footer__inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding-bottom:38px}
.footer__brand .brand__name{color:#fff;font-size:20px}
.footer__brand p{margin-top:8px;color:#C9B4A9;font-size:14px}
.footer__col h5{color:#fff;margin-bottom:14px;font-size:15px}
.footer__col a{display:block;color:#C9B4A9;font-size:14px;margin-bottom:9px;transition:.2s}
.footer__col a:hover{color:#fff}
.footer__legal{border-top:1px solid rgba(255,255,255,.1);padding:18px 0 26px;text-align:center}
.footer__legal p{font-size:12.5px;color:#B7A298}
.footer__disclaimer{margin-top:6px;color:#9C887E}

/* ============ 滚动渐显 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:900px){
  .hero__inner,.feat,.about,.contact{grid-template-columns:1fr}
  .feat--rev .feat__art{order:0}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .steps,.cards,.news{grid-template-columns:repeat(2,1fr)}
  .nav__links{position:fixed;inset:70px 0 auto 0;flex-direction:column;background:var(--cream);border-bottom:1px solid var(--line);padding:18px 22px 26px;gap:4px;transform:translateY(-130%);transition:.3s;box-shadow:var(--shadow)}
  .nav__links.open{transform:none}
  .nav__links a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav__cta{margin-top:8px;text-align:center}
  .nav__toggle{display:flex}
}
@media (max-width:560px){
  .steps,.cards,.news,.stats__grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  .hero{padding:46px 0 40px}
  .stores{flex-direction:column}
  .footer__inner{grid-template-columns:1fr 1fr}
}

/* ============ Toast 提示 ============ */
.toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%) translateY(22px);background:var(--ink);color:#fff;padding:13px 24px;border-radius:999px;font-size:15px;font-weight:600;box-shadow:0 16px 38px -14px rgba(0,0,0,.45);opacity:0;pointer-events:none;transition:.32s cubic-bezier(.2,.7,.2,1);z-index:120;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}