/* ============================================================
   IBSO 伊本颂 — 新中式芳疗
   配色取自品牌 PPT：白底 + 青绿(teal)体系
   ============================================================ */

:root{
  /* 品牌青绿 —— 直接取自 PPT 母版色值 */
  --teal-900:#206260;
  --teal-800:#267472;   /* 主色 */
  --teal-700:#2A807E;
  --teal-600:#339999;
  --teal-500:#4FC8C5;
  --teal-400:#68D0CD;
  --teal-300:#93DDDB;
  --teal-200:#BCEAE8;
  --teal-100:#C2ECEB;
  --teal-50:#DCF4F3;

  --ink:#16302f;
  --ink-2:#3d5a58;
  --ink-3:#6b8a88;
  --line:rgba(38,116,114,.14);
  --bg:#ffffff;

  --serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif CJK SC","Noto Serif SC",Georgia,serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --wrap:1180px;
  --r:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
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;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.28;margin:0;letter-spacing:.02em}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0;list-style:none}

.wrap{width:min(100% - 2.5rem,var(--wrap));margin-inline:auto}

/* ---------- 通用组件 ---------- */
.eyebrow{
  font-size:.75rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--teal-700);font-weight:600;margin-bottom:1rem;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.85rem 1.9rem;border-radius:999px;
  background:var(--teal-800);color:#fff;font-size:.94rem;font-weight:500;
  letter-spacing:.04em;border:1px solid var(--teal-800);
  transition:background .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
  white-space:nowrap;
}
.btn:hover{background:var(--teal-900);transform:translateY(-2px);box-shadow:0 12px 28px -12px rgba(32,98,96,.55)}
.btn--ghost{background:transparent;color:var(--teal-800)}
.btn--ghost:hover{background:var(--teal-50);color:var(--teal-900)}
.btn--light{background:#fff;color:var(--teal-800);border-color:#fff}
.btn--light:hover{background:var(--teal-50);color:var(--teal-900)}
.btn--sm{padding:.6rem 1.3rem;font-size:.85rem}

.section{padding:clamp(5rem,10vw,8.5rem) 0}
.section--tint{background:linear-gradient(180deg,#fff 0%,var(--teal-50) 40%,var(--teal-50) 60%,#fff 100%)}
.section--dark{background:var(--teal-800);color:#fff}

.sec-head{max-width:44rem;margin-bottom:clamp(2.5rem,5vw,4rem)}
.sec-head h2{font-size:clamp(1.85rem,4vw,2.8rem)}
.sec-head__lede{margin-top:1rem;color:var(--ink-2);font-size:1.02rem}
.sec-head--center{margin-inline:auto;text-align:center}
.sec-head--tight{margin-top:clamp(3.5rem,7vw,6rem)}
.section--dark .eyebrow{color:var(--teal-200)}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto;z-index:50;
  background:rgba(255,255,255,0);backdrop-filter:blur(0);
  transition:background .35s var(--ease),backdrop-filter .35s var(--ease),box-shadow .35s var(--ease);
}
.nav.is-stuck{
  background:rgba(255,255,255,.86);backdrop-filter:blur(14px) saturate(1.4);
  box-shadow:0 1px 0 var(--line);
}
.nav__inner{display:flex;align-items:center;gap:2rem;height:74px}
.brand{display:flex;align-items:baseline;gap:.55rem;margin-right:auto}
.brand__mark{font-family:var(--serif);font-size:1.4rem;letter-spacing:.24em;color:var(--teal-800);font-weight:600}
.brand__cn{font-size:.85rem;letter-spacing:.3em;color:var(--ink-3)}
.nav__links{display:flex;gap:2rem}
.nav__links a{font-size:.92rem;color:var(--ink-2);position:relative;transition:color .25s var(--ease)}
.nav__links a::after{
  content:"";position:absolute;left:0;bottom:-6px;width:100%;height:1px;
  background:var(--teal-800);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav__links a:hover{color:var(--teal-800)}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__toggle{display:none;background:none;border:0;padding:.5rem;cursor:pointer}
.nav__toggle span{display:block;width:22px;height:1.5px;background:var(--ink);margin:5px 0;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.nav.is-open .nav__toggle span:first-child{transform:translateY(3.25px) rotate(45deg)}
.nav.is-open .nav__toggle span:last-child{transform:translateY(-3.25px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:clamp(8rem,14vw,11rem) 0 clamp(4rem,8vw,7rem);overflow:hidden}
.hero__bg{position:absolute;inset:0;pointer-events:none}
.hero__bg .orb{position:absolute;border-radius:50%;filter:blur(2px);opacity:.5}
.orb--1{width:520px;height:520px;right:-140px;top:-120px;
  background:radial-gradient(circle at 35% 35%,var(--teal-200),rgba(220,244,243,0) 68%)}
.orb--2{width:340px;height:340px;left:-120px;bottom:4%;
  background:radial-gradient(circle at 50% 50%,var(--teal-100),rgba(220,244,243,0) 70%)}
.orb--3{width:180px;height:180px;left:52%;top:12%;opacity:.35;
  background:radial-gradient(circle at 50% 50%,var(--teal-300),rgba(147,221,219,0) 70%)}
/* PPT 里的细竖线装饰 */
.rules{
  position:absolute;right:8%;top:14%;width:52px;height:120px;opacity:.5;
  background:repeating-linear-gradient(90deg,var(--teal-300) 0 2px,transparent 2px 13px);
  mask-image:linear-gradient(180deg,transparent,#000 40%,#000 70%,transparent);
}

.hero__inner{
  position:relative;display:grid;gap:clamp(2.5rem,6vw,4.5rem);
  grid-template-columns:1.05fr .95fr;align-items:center;
}
.hero__title{margin:.4rem 0 1.6rem;display:flex;align-items:baseline;gap:.6rem;flex-wrap:wrap}
.hero__title-main{font-size:clamp(2.9rem,7vw,4.9rem);color:var(--teal-800);letter-spacing:.06em}
.hero__title-sub{font-size:clamp(1.3rem,2.8vw,2rem);color:var(--teal-400);letter-spacing:.3em}
.hero__lede{color:var(--ink-2);font-size:1.05rem;max-width:32rem;line-height:1.95}
.hero__cta{display:flex;gap:1rem;margin-top:2.4rem;flex-wrap:wrap}

.hero__facts{display:flex;gap:clamp(1.5rem,4vw,3rem);margin-top:3.2rem;padding-top:2rem;border-top:1px solid var(--line)}
.hero__facts li{display:flex;flex-direction:column;gap:.15rem}
.hero__facts strong{font-family:var(--serif);font-size:1.9rem;color:var(--teal-800);line-height:1}
.hero__facts sup{font-size:.55em;top:-.5em}
.hero__facts span{font-size:.8rem;color:var(--ink-3);letter-spacing:.1em}

.hero__shot{position:relative;margin:0;display:flex;flex-direction:column;align-items:center;gap:1.4rem}
.shot__halo{
  position:absolute;inset:auto;width:min(30rem,84%);aspect-ratio:1;border-radius:50%;
  top:50%;left:50%;transform:translate(-50%,-54%);
  background:radial-gradient(circle at 50% 45%,var(--teal-100) 0%,rgba(220,244,243,.55) 45%,rgba(255,255,255,0) 72%);
}
.hero__shot img{position:relative;width:auto;height:clamp(19rem,50vh,28rem);animation:float 7s ease-in-out infinite}
.shot__cap{position:relative;font-size:.84rem;letter-spacing:.12em;color:var(--ink-3)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

/* ---------- 理念 ---------- */
.philo__quote{
  margin:0 0 clamp(2.5rem,5vw,4rem);padding-left:clamp(1.2rem,3vw,2.2rem);
  border-left:2px solid var(--teal-400);
  font-family:var(--serif);font-size:clamp(1.05rem,2vw,1.3rem);line-height:2.1;color:var(--ink);
  max-width:56rem;
}
.philo__grid{display:grid;gap:1.25rem;grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:2rem 1.6rem;transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 48px -28px rgba(32,98,96,.4)}
.card__no{font-family:var(--serif);font-size:.85rem;letter-spacing:.2em;color:var(--teal-400)}
.card h3{font-size:1.25rem;margin:.7rem 0 .8rem}
.card p{font-size:.92rem;color:var(--ink-2);line-height:1.9}

/* ---------- 产品 ---------- */
.prods{display:grid;gap:1.5rem;grid-template-columns:repeat(3,1fr)}
.prod{
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff;
  display:flex;flex-direction:column;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease);
}
.prod:hover{transform:translateY(-8px);box-shadow:0 30px 60px -34px rgba(32,98,96,.5)}
.prod__art{display:grid;place-items:center;padding:3rem 0;position:relative}
.prod__art--a{background:linear-gradient(160deg,var(--teal-50),#fff)}
.prod__art--b{background:linear-gradient(160deg,var(--teal-100),#fff)}
.prod__art--c{background:linear-gradient(160deg,#eef7ec,#fff)}
.prod__art img{width:8.5rem;transition:transform .5s var(--ease)}
.prod:hover .prod__art img{transform:translateY(-6px) scale(1.03)}
.prod__body{padding:1.9rem 1.7rem 2.1rem;display:flex;flex-direction:column;gap:.75rem;flex:1}
.prod__tag{
  align-self:flex-start;font-size:.74rem;letter-spacing:.14em;
  color:var(--teal-700);background:var(--teal-50);
  padding:.3rem .8rem;border-radius:999px;
}
.prod h3{font-size:1.35rem}
.prod__desc{font-size:.93rem;color:var(--ink-2);line-height:1.95;flex:1}
.prod__meta{display:flex;gap:2rem;padding-top:1rem;border-top:1px solid var(--line);margin-top:.4rem}
.prod__meta dt{font-size:.72rem;letter-spacing:.14em;color:var(--ink-3);margin-bottom:.25rem}
.prod__meta dd{font-size:.86rem;color:var(--teal-800);font-weight:500}

/* ---------- 使用步骤 ---------- */
.steps{display:grid;gap:clamp(1.5rem,4vw,3rem);grid-template-columns:repeat(3,1fr);counter-reset:s}
.step{position:relative;padding-top:2.5rem}
.step::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:1px;
  background:rgba(255,255,255,.28);
}
.step__no{
  font-family:var(--serif);font-size:2.4rem;color:rgba(255,255,255,.55);
  display:block;line-height:1;margin-bottom:1rem;letter-spacing:.05em;
}
.step h3{font-size:1.3rem;margin-bottom:.7rem}
.step p{color:rgba(255,255,255,.82);font-size:.94rem;line-height:1.95}

/* ---------- 团队 ---------- */
.people--lead{display:grid;gap:1.5rem;grid-template-columns:repeat(3,1fr)}
.people--grid{display:grid;gap:1.5rem;grid-template-columns:repeat(2,1fr)}

.person{display:flex;flex-direction:column;gap:1.3rem}
.person__photo{
  position:relative;border-radius:var(--r);overflow:hidden;background:var(--teal-50);
  aspect-ratio:4/5;
}
.person__photo img{width:100%;height:100%;object-fit:cover;object-position:center 22%;
  transition:transform .6s var(--ease);filter:saturate(.92)}
.person:hover .person__photo img{transform:scale(1.04)}
.person h3{font-size:1.3rem;display:flex;align-items:baseline;gap:.6rem;flex-wrap:wrap}
.person__cn{font-family:var(--sans);font-size:.85rem;font-weight:400;color:var(--ink-3);letter-spacing:.08em}
.person__role{font-size:.86rem;color:var(--teal-700);margin:.45rem 0 .7rem;line-height:1.7}
.person__bio{font-size:.9rem;color:var(--ink-2);line-height:1.95}

.person--card{
  flex-direction:row;gap:1.5rem;align-items:flex-start;
  border:1px solid var(--line);border-radius:var(--r);padding:1.5rem;
  transition:box-shadow .4s var(--ease),transform .4s var(--ease);
}
.person--card:hover{transform:translateY(-4px);box-shadow:0 24px 48px -30px rgba(32,98,96,.42)}
.person--card .person__photo{flex:0 0 8.5rem;aspect-ratio:3/4}
.person--card .person__body{flex:1;min-width:0}

/* ---------- 结尾 ---------- */
.closing{
  background:linear-gradient(135deg,var(--teal-800),var(--teal-600));
  color:#fff;text-align:center;padding:clamp(5rem,9vw,7.5rem) 0;
}
.closing h2{font-size:clamp(1.9rem,4.4vw,3rem);letter-spacing:.06em}
.closing p{margin:1.1rem 0 2.4rem;color:rgba(255,255,255,.85);letter-spacing:.16em;font-size:.95rem}

.footer{padding:3.5rem 0;border-top:1px solid var(--line)}
.footer__inner{display:grid;gap:1.2rem;justify-items:center;text-align:center}
.footer__brand{display:flex;align-items:baseline;gap:.55rem}
.footer__note{font-size:.8rem;color:var(--ink-3);max-width:40rem;line-height:1.9}
.footer__copy{font-size:.78rem;color:var(--ink-3);letter-spacing:.1em}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.1s}
.reveal[data-delay="2"]{transition-delay:.2s}
.reveal[data-delay="3"]{transition-delay:.3s}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .hero__inner{grid-template-columns:1fr;text-align:left}
  .hero__shot{order:-1}
  .hero__shot img{height:clamp(15rem,38vh,20rem)}
  .philo__grid{grid-template-columns:repeat(2,1fr)}
  .prods,.people--lead{grid-template-columns:1fr}
  .prod{flex-direction:row}
  .prod__art{flex:0 0 40%;padding:2rem 0}
  .people--grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}

  .nav__toggle{display:block}
  .nav .btn--sm{display:none}
  .nav__links{
    position:absolute;inset:74px 0 auto;flex-direction:column;gap:0;
    background:rgba(255,255,255,.97);backdrop-filter:blur(14px);
    padding:0 1.25rem;max-height:0;overflow:hidden;
    transition:max-height .4s var(--ease);border-bottom:1px solid transparent;
  }
  .nav.is-open .nav__links{max-height:20rem;border-bottom-color:var(--line)}
  .nav__links a{padding:1rem 0;border-bottom:1px solid var(--line)}
  .nav__links a:last-child{border-bottom:0}
}

@media (max-width:640px){
  body{font-size:15px}
  .hero{padding-top:6.5rem}
  .hero__shot img{height:clamp(13rem,32vh,17rem)}
  .hero__shot{gap:1rem}
  .philo__grid{grid-template-columns:1fr}
  .prod{flex-direction:column}
  .prod__art{flex:none;padding:2.5rem 0}
  .person--card{padding:1.1rem;gap:1.1rem}
  .person--card .person__photo{flex:0 0 6.5rem}
  .people--lead .person__photo{max-height:20rem}
  .hero__facts{gap:1.5rem}
  .hero__facts strong{font-size:1.5rem}
}

/* 页脚 ICP 备案号 —— 承诺书第二条要求：主页底部标明核准编号并链接至工信部 */
.footer__icp a{
  font-size:.78rem;color:var(--ink-3);letter-spacing:.06em;
  text-decoration:none;transition:color .25s var(--ease);
}
.footer__icp a:hover{color:var(--teal-800)}