:root{
  --yellow:#FFD200;
  --yellow-deep:#F5B700;
  --ink:#2b2b2b;
  --grey:#888;
  --grey-light:#d8d8d8;
  --grey-bg:#dadcde;
  --maxw:1200px;
}
@font-face{
  font-family:"Alibaba PuHuiTi";
  src:url("../fonts/Alibaba_PuHuiTi_2.0_35_Thin_35_Thin.ttf") format("truetype");
  font-weight:100;
  font-style:normal;
  font-display:swap;
}
@font-face{
  font-family:"Alibaba PuHuiTi";
  src:url("../fonts/Alibaba_PuHuiTi_2.0_45_Light_45_Light.ttf") format("truetype");
  font-weight:300 500;
  font-style:normal;
  font-display:swap;
}
@font-face{
  font-family:"Alibaba PuHuiTi";
  src:url("../fonts/Alibaba_PuHuiTi_2.0_75_SemiBold_75_SemiBold.ttf") format("truetype");
  font-weight:600 900;
  font-style:normal;
  font-display:swap;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:50px}
body{
  font-family:"Alibaba PuHuiTi","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:#fff;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  background:#fff;
  box-shadow:0 1px 0 rgba(0,0,0,.06);
}
.nav__inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  height:50px;display:grid;grid-template-columns:130px 1fr 130px;align-items:center;gap:24px;
}
.nav__logo{justify-self:start}
.nav__logo img{height:30px;width:auto}
.nav__menu{display:flex;gap:36px;margin-left:0;justify-self:center}
.nav__menu a{
  font-size:16px;color:#a8a8a8;font-weight:500;
  padding:6px 0;position:relative;transition:color .2s;
  white-space:nowrap;
}
.nav__menu a:hover{color:var(--ink);font-weight:700}
.nav__menu a.active{color:var(--ink);font-weight:700}
.nav__search{width:130px;height:31px;justify-self:end;display:flex;align-items:center;
  border:1px solid #ddd;border-radius:20px;overflow:hidden;background:#fafafa}
.nav__search input{border:0;outline:0;background:transparent;
  padding:5px 8px 5px 14px;width:0;min-width:0;flex:1;font-size:13px}
.nav__search button{border:0;background:transparent;cursor:pointer;
  width:31px;height:31px;padding:0;color:#999;display:flex;align-items:center;justify-content:center;flex:0 0 31px}
.nav__toggle{display:none;justify-self:end;background:none;border:0;
  flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.nav__toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px}

/* ---------- Hero ---------- */
.hero{position:relative;height:calc(100vh - 50px);background:var(--yellow);overflow:hidden;line-height:0}
.hero__video{position:relative;z-index:1;display:block;width:100%;height:100%;object-fit:cover;object-position:center 42%}
.hero__caption{
  position:absolute;right:5.5%;bottom:14%;z-index:3;
  width:clamp(220px,24vw,460px);height:auto;
}

/* ---------- 关于齿记 ---------- */
.about__photo img{width:100%;height:auto}
.about__body{background:var(--grey-bg);padding:56px 0 40px}
.about__body .container{container-type:inline-size}
.about__title{font-size:3.2cqw;color:#444;margin-bottom:22px;letter-spacing:1px}
.about__text{font-size:1.44cqw;color:#7a7d80;text-align:justify;max-width:1100px}
.about__hours{font-size:1.44cqw;color:#5a5d60;font-weight:600;margin-top:22px}
.about__brands{background:var(--grey-bg);padding:30px 0 60px}
.about__brands .container{position:relative}
.about__brands .container::before{
  content:"";display:block;height:1px;background:#bcbfc2;margin-bottom:36px}
.about__brands img{width:100%;height:auto}

/* ---------- 业务项目（编码版：整幅图 + 叠加文字） ---------- */
.services{padding:0 24px;background:#fff;max-width:var(--maxw);margin:0 auto}
.svc{position:relative}
.svc__inner{position:relative;width:100%;container-type:inline-size}
.svc__bg{display:block;width:100%;height:auto}
/* 最后一块黄色上移，贴住绿色并让右上角白云叠到绿色上 */
.svc--7{margin-top:-3.92%;z-index:1}

/* 文字层（cqw 单位随图同比缩放，始终对齐面板） */
.svc__text{position:absolute;top:50%;transform:translateY(-50%)}
.svc__text--r{right:3.5%;width:45%}
.svc__text--l{left:4%;width:43%}
.svc__en{font-size:5cqw;font-weight:800;line-height:1.05;margin:0;letter-spacing:.3px}
.svc__cn{font-size:3.2cqw;font-weight:700;margin:.55em 0 0}
.svc__tag{font-size:2cqw;font-weight:600;margin:.4em 0 0}
.svc__desc{margin-top:.7em}
.svc__desc p{font-size:1.44cqw;line-height:1.82;margin:0;text-align:justify}
.svc__desc p+p{margin-top:.4em}

/* 文字配色 */
.svc--1 .svc__text,.svc--2 .svc__text,.svc--4 .svc__text,
.svc--5 .svc__text,.svc--6 .svc__text{color:#fff}
.svc--1 .svc__desc p,.svc--2 .svc__desc p,.svc--4 .svc__desc p,
.svc--5 .svc__desc p,.svc--6 .svc__desc p{color:rgba(255,255,255,.93)}
.svc--1 .svc__tag{color:#e7dcfb}
.svc--3 .svc__text{color:#1a1a1a}
.svc--3 .svc__desc p{color:#4a4a3a}

/* 7 种植牙 */
.svc__text7{position:absolute;left:4%;top:50%;transform:translateY(-50%);width:54%}
.svc__en7{font-size:5.2cqw;line-height:1.1;color:rgba(70,55,0,.42);font-weight:800;margin:0}
.svc__cn7{font-size:3.2cqw;color:#1a1a1a;font-weight:700;margin:.45em 0 0}
.svc__desc7{position:absolute;right:3.5%;top:9%;width:37%}
.svc__desc7 p{font-size:1.44cqw;line-height:1.82;color:#3a3a2a;text-align:justify;margin:0}

/* ---------- 通用标题 ---------- */
.section-title{
  text-align:center;font-size:30px;color:#333;letter-spacing:2px;
  padding:60px 0 8px;
}
.section-title span{
  display:block;font-size:13px;color:var(--yellow-deep);
  letter-spacing:4px;font-weight:600;margin-top:10px;
}

/* ---------- 齿记案例 ---------- */
.cases{padding:0 0 50px}
.case-list{display:flex;flex-direction:column;gap:18px;width:100%}
.case-card{overflow:hidden;width:100%;border-radius:0;background:#fff}
.case-card img{width:100%;height:auto;display:block;border-radius:0;background:#fff}

/* ---------- 联系我们 ---------- */
.contact{padding:46px 0 40px}
.contact__qr{text-align:left}
.contact__qr img{width:100%;max-width:760px;height:auto;margin:0 0 14px}
.contact__info{padding:18px 4px 10px}
.contact__info h3{font-size:24px;color:#9fa0a0;font-weight:700;margin-bottom:18px}
.contact__info p{font-size:15px;color:#9fa0a0;margin:6px 0}
.contact__info span{color:#9fa0a0}
.contact__info a{color:#9fa0a0;transition:color .2s}
.contact__info a:hover{color:var(--yellow-deep)}

/* ---------- 页脚 ---------- */
.footer{padding-bottom:40px}
.footer__bar{height:8px;background:#9fa0a0;position:relative;margin:0 auto 26px;max-width:var(--maxw);width:calc(100% - 48px)}
.footer__bar::after{content:"";position:absolute;right:0;top:0;height:100%;
  width:18%;background:var(--yellow)}
.footer p{text-align:left;font-size:13px;color:#bbb;letter-spacing:.5px}

/* ---------- 响应式 ---------- */
@media(max-width:860px){
  .nav__inner{grid-template-columns:auto 1fr auto;gap:14px}
  .nav__search{display:none}
  .nav__toggle{display:flex}
  .nav__menu{
    position:absolute;top:50px;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;margin:0;padding:8px 0;
    box-shadow:0 8px 16px rgba(0,0,0,.1);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  body.menu-open .nav__menu{max-height:340px}
  .nav__menu a{padding:14px 24px;font-size:17px}
  .section-title{font-size:24px;padding-top:44px}
}
@media(max-width:680px){
  .case-list{gap:12px}
}