/* ============================================
   睿视光学 LUMIVUE — 官网样式
   配色：午夜深蓝(专业光学) + 琥珀金(高端质感) + 青蓝(镜片折射)
   ============================================ */

:root{
  /* 主色系 */
  --ink:        #050b1a;   /* 最深背景 */
  --ink-2:      #0a1428;   /* 次深背景 */
  --ink-3:      #101f3d;   /* 卡片背景 */
  --navy:       #16305e;   /* 品牌蓝 */

  /* 强调色 */
  --gold:       #e8b14c;   /* 琥珀金 - 主强调 */
  --gold-lt:    #ffd684;
  --cyan:       #38d7e0;   /* 折射青 - 次强调 */
  --violet:     #7b6bff;   /* 光谱紫 */

  /* 文字 */
  --txt:        #eef3fb;
  --txt-mid:    #a8b8d4;
  --txt-dim:    #6d7f9e;

  --line:       rgba(255,255,255,.09);
  --glass:      rgba(255,255,255,.045);

  --grad-gold:  linear-gradient(100deg,#ffd684,#e8b14c 45%,#c98a2a);
  --grad-cool:  linear-gradient(100deg,#38d7e0,#7b6bff);

  --radius:     18px;
  --radius-sm:  12px;
  --maxw:       1240px;
  --ease:       cubic-bezier(.22,.8,.28,1);

  --shadow:     0 24px 60px -20px rgba(0,0,0,.7);
  --shadow-gold:0 18px 46px -14px rgba(232,177,76,.42);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%}

body{
  background:var(--ink);
  color:var(--txt);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",-apple-system,
              BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font:inherit;color:inherit}

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

/* ---------- 通用文本 ---------- */
.eyebrow{
  font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--gold);font-weight:600;margin-bottom:1rem;
  display:flex;align-items:center;gap:.7rem;
}
.eyebrow::before{
  content:"";width:34px;height:1px;background:var(--grad-gold);flex:none;
}

.grad{
  background:var(--grad-gold);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ============ 光晕背景 ============ */
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.aurora__blob{
  position:absolute;border-radius:50%;filter:blur(110px);opacity:.4;
  will-change:transform;
}
.aurora__blob--1{width:640px;height:640px;background:#1b47a8;top:-200px;left:-160px;animation:drift1 26s ease-in-out infinite}
.aurora__blob--2{width:520px;height:520px;background:#b8802c;top:24%;right:-180px;opacity:.28;animation:drift2 32s ease-in-out infinite}
.aurora__blob--3{width:560px;height:560px;background:#127a86;bottom:-220px;left:34%;opacity:.24;animation:drift3 30s ease-in-out infinite}

@keyframes drift1{50%{transform:translate(120px,90px) scale(1.15)}}
@keyframes drift2{50%{transform:translate(-110px,70px) scale(1.1)}}
@keyframes drift3{50%{transform:translate(80px,-90px) scale(1.12)}}

/* ============ 导航 ============ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .4s var(--ease),backdrop-filter .4s,border-color .4s,padding .4s;
  border-bottom:1px solid transparent;
}
.header.is-stuck{
  background:rgba(5,11,26,.82);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border-bottom-color:var(--line);
}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:76px}

.logo{display:flex;align-items:center;gap:.7rem;flex:none}
.logo__mark{width:44px;height:26px;color:var(--gold)}
.logo__text{font-size:1.12rem;font-weight:700;letter-spacing:.04em;line-height:1.1}
.logo__text em{
  display:block;font-style:normal;font-size:.6rem;letter-spacing:.32em;
  color:var(--txt-dim);font-weight:500;
}

.nav{display:flex;align-items:center;gap:2rem}
.nav__link{
  position:relative;font-size:.94rem;color:var(--txt-mid);
  transition:color .3s;padding:.3rem 0;
}
.nav__link::after{
  content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:var(--grad-gold);border-radius:2px;transition:width .35s var(--ease);
}
.nav__link:hover{color:var(--txt)}
.nav__link.is-active{color:var(--txt)}
.nav__link.is-active::after{width:100%}
.nav__cta{margin-left:.4rem}

.burger{
  display:none;flex-direction:column;gap:5px;background:none;border:0;
  cursor:pointer;padding:8px;
}
.burger span{width:24px;height:2px;background:var(--txt);border-radius:2px;transition:.35s var(--ease)}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  padding:.9rem 1.9rem;border-radius:999px;border:1px solid transparent;
  font-size:.95rem;font-weight:600;cursor:pointer;
  transition:transform .3s var(--ease),box-shadow .3s,background .3s,border-color .3s,color .3s;
  white-space:nowrap;
}
.btn--gold{background:var(--grad-gold);color:#231604;box-shadow:var(--shadow-gold)}
.btn--gold:hover{transform:translateY(-3px);box-shadow:0 24px 56px -12px rgba(232,177,76,.6)}
.btn--ghost{border-color:rgba(255,255,255,.22);color:var(--txt);background:var(--glass)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold-lt);transform:translateY(-3px)}
.btn--sm{padding:.6rem 1.25rem;font-size:.86rem}
.btn--full{width:100%;padding:1rem}
.btn__play{font-size:.7rem}

/* ============ Hero ============ */
.hero{
  position:relative;z-index:1;min-height:100svh;display:flex;align-items:center;
  padding:130px 0 90px;
}
.hero__inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:4rem;align-items:center;
}
.hero__title{
  font-size:clamp(2.6rem,5.6vw,4.6rem);line-height:1.1;font-weight:800;
  letter-spacing:-.02em;margin-bottom:1.5rem;
}
.hero__desc{
  color:var(--txt-mid);font-size:1.05rem;max-width:33em;margin-bottom:2.4rem;
}
.hero__desc strong{color:var(--gold-lt);font-weight:700}
.hero__actions{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:3.4rem}

.hero__stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;
  padding-top:2rem;border-top:1px solid var(--line);
}
.hero__stats b{
  display:block;font-size:clamp(1.8rem,3vw,2.5rem);font-weight:800;line-height:1;
  background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero__stats span{font-size:.82rem;color:var(--txt-dim);letter-spacing:.05em}

/* --- 眼镜视觉 --- */
.hero__visual{display:flex;justify-content:center;align-items:center}
.lens-stage{
  position:relative;width:min(100%,460px);aspect-ratio:1;
  display:flex;align-items:center;justify-content:center;
  animation:float 7s ease-in-out infinite;
}
@keyframes float{50%{transform:translateY(-16px)}}

.lens-ring{
  position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.08);
}
.lens-ring--outer{inset:0;border-style:dashed;animation:spin 44s linear infinite}
.lens-ring--mid{inset:13%;border-color:rgba(232,177,76,.2);animation:spin 30s linear infinite reverse}
@keyframes spin{to{transform:rotate(360deg)}}

.lens{
  position:relative;width:35%;aspect-ratio:1.24;border-radius:44% 44% 48% 48%/50% 50% 54% 54%;
  background:
    radial-gradient(120% 100% at 30% 22%,rgba(255,255,255,.34),rgba(56,215,224,.15) 42%,rgba(22,48,94,.42) 70%),
    linear-gradient(150deg,rgba(123,107,255,.28),rgba(232,177,76,.2));
  border:2px solid rgba(255,255,255,.28);
  box-shadow:
    inset 0 0 44px rgba(255,255,255,.24),
    0 20px 60px -12px rgba(56,215,224,.4);
  backdrop-filter:blur(6px);
  overflow:hidden;
}
.lens--left{margin-right:3.5%}
.lens--right{margin-left:3.5%}
.lens__flare{
  position:absolute;top:-60%;left:-80%;width:70%;height:220%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);
  transform:rotate(22deg);
  animation:sweep 4.5s var(--ease) infinite;
}
.lens--right .lens__flare{animation-delay:.45s}
@keyframes sweep{0%{left:-90%}55%,100%{left:150%}}

.lens-bridge{
  position:absolute;top:42%;left:50%;transform:translate(-50%,-50%);
  width:15%;height:6px;border-radius:4px;
  background:linear-gradient(90deg,rgba(255,255,255,.4),var(--gold),rgba(255,255,255,.4));
}

.spec-tag{
  position:absolute;padding:.42rem .9rem;border-radius:999px;
  background:rgba(10,20,40,.72);border:1px solid rgba(232,177,76,.32);
  font-size:.76rem;color:var(--gold-lt);white-space:nowrap;
  backdrop-filter:blur(10px);box-shadow:0 8px 24px -8px rgba(0,0,0,.6);
  animation:tagIn .8s var(--ease) backwards;
}
.spec-tag--1{top:14%;right:2%;animation-delay:.9s}
.spec-tag--2{bottom:20%;left:0;animation-delay:1.1s}
.spec-tag--3{bottom:6%;right:12%;animation-delay:1.3s}
@keyframes tagIn{from{opacity:0;transform:translateY(12px) scale(.9)}}

.scroll-hint{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
  font-size:.7rem;letter-spacing:.3em;color:var(--txt-dim);
  display:flex;flex-direction:column;align-items:center;gap:.6rem;
}
.scroll-hint__line{
  width:1px;height:44px;background:linear-gradient(var(--gold),transparent);
  animation:hint 2s ease-in-out infinite;
}
@keyframes hint{50%{opacity:.25;transform:scaleY(.6)}}

/* ============ 信任条 ============ */
.trustbar{
  position:relative;z-index:1;
  border-block:1px solid var(--line);background:rgba(255,255,255,.02);
  padding:1.2rem 0;
}
.trustbar__inner{display:flex;align-items:center;gap:2rem;flex-wrap:wrap}
.trustbar__label{
  font-size:.76rem;letter-spacing:.2em;color:var(--gold);font-weight:600;flex:none;
}
.trustbar__list{display:flex;gap:2.4rem;flex-wrap:wrap}
.trustbar__list li{
  font-size:.86rem;color:var(--txt-dim);position:relative;padding-left:1.1rem;
}
.trustbar__list li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--cyan);
}

/* ============ 通用 section ============ */
.section{position:relative;z-index:1;padding:clamp(5rem,10vw,8.5rem) 0}
.section--dark{background:linear-gradient(180deg,transparent,rgba(5,11,26,.72) 18%,rgba(5,11,26,.72) 82%,transparent)}
.section__head{max-width:760px;margin-bottom:3.6rem}
.section__title{
  font-size:clamp(1.9rem,3.6vw,3rem);font-weight:800;line-height:1.22;
  letter-spacing:-.015em;margin-bottom:1.1rem;
}
.section__sub{color:var(--txt-mid);font-size:1.02rem;max-width:56ch}

/* ============ 产品中心 ============ */
.tabs{display:flex;gap:.6rem;flex-wrap:wrap;margin-bottom:2.6rem}
.tabs__btn{
  padding:.62rem 1.4rem;border-radius:999px;cursor:pointer;
  background:var(--glass);border:1px solid var(--line);color:var(--txt-mid);
  font-size:.9rem;transition:.3s var(--ease);
}
.tabs__btn:hover{color:var(--txt);border-color:rgba(232,177,76,.4)}
.tabs__btn.is-active{
  background:var(--grad-gold);color:#231604;border-color:transparent;
  font-weight:600;box-shadow:var(--shadow-gold);
}

.prod-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(268px,1fr));gap:1.4rem}

.card{
  position:relative;border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);
  padding:1.6rem;display:flex;flex-direction:column;
  transition:transform .45s var(--ease),border-color .35s,box-shadow .45s;
  animation:cardIn .55s var(--ease) backwards;
}
@keyframes cardIn{from{opacity:0;transform:translateY(22px)}}
.card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .45s;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(232,177,76,.14),transparent 65%);
  pointer-events:none;
}
.card:hover{transform:translateY(-8px);border-color:rgba(232,177,76,.42);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}

.card__visual{
  height:150px;border-radius:var(--radius-sm);margin-bottom:1.3rem;
  display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;
}
.card__visual svg{width:96px;height:auto;color:rgba(255,255,255,.9);position:relative;z-index:1}
.card__visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 40%,rgba(255,255,255,.16) 50%,transparent 60%);
  transform:translateX(-100%);transition:transform .8s var(--ease);
}
.card:hover .card__visual::after{transform:translateX(100%)}

.card__tag{
  position:absolute;top:1.1rem;right:1.1rem;z-index:2;
  font-size:.68rem;padding:.26rem .68rem;border-radius:999px;
  background:rgba(5,11,26,.7);border:1px solid rgba(232,177,76,.4);color:var(--gold-lt);
}
.card h3{font-size:1.16rem;margin-bottom:.5rem;font-weight:700}
.card__desc{font-size:.9rem;color:var(--txt-mid);margin-bottom:1.1rem;flex:1}
.card__specs{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:1.1rem}
.card__specs span{
  font-size:.72rem;padding:.24rem .62rem;border-radius:6px;
  background:rgba(56,215,224,.1);border:1px solid rgba(56,215,224,.22);color:var(--cyan);
}
.card__foot{
  display:flex;align-items:baseline;justify-content:space-between;
  padding-top:1rem;border-top:1px solid var(--line);
}
.card__price b{font-size:1.3rem;color:var(--gold);font-weight:800}
.card__price small{font-size:.76rem;color:var(--txt-dim);margin-left:.25rem}
.card__more{font-size:.84rem;color:var(--txt-mid);transition:color .3s,transform .3s}
.card:hover .card__more{color:var(--gold);transform:translateX(4px)}

/* ============ 智造流程 ============ */
.flow{position:relative;margin-bottom:4.5rem}
.flow__line{
  position:absolute;top:34px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(232,177,76,.5),rgba(56,215,224,.5),transparent);
}
.flow__list{display:grid;grid-template-columns:repeat(4,1fr);gap:1.6rem;position:relative}
.flow__item{
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:2.4rem 1.5rem 1.7rem;position:relative;
  transition:transform .4s var(--ease),border-color .35s;
}
.flow__item:hover{transform:translateY(-6px);border-color:rgba(56,215,224,.4)}
.flow__no{
  position:absolute;top:-1px;left:1.5rem;transform:translateY(-50%);
  width:52px;height:52px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink-2);border:1px solid rgba(232,177,76,.45);
  font-weight:800;color:var(--gold);font-size:1rem;
  box-shadow:0 0 0 6px var(--ink);
}
.flow__item h3{font-size:1.08rem;margin:.6rem 0 .55rem;font-weight:700}
.flow__item p{font-size:.88rem;color:var(--txt-mid)}

.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.cap{
  text-align:center;padding:2rem 1rem;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  transition:border-color .35s,transform .4s var(--ease);
}
.cap:hover{border-color:rgba(232,177,76,.4);transform:translateY(-5px)}
.cap b{
  display:block;font-size:clamp(1.7rem,3vw,2.4rem);font-weight:800;line-height:1;
  background:var(--grad-cool);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;margin-bottom:.5rem;
}
.cap span{font-size:.85rem;color:var(--txt-dim)}

/* ============ 视光服务 ============ */
.svc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:1.4rem}
.svc{
  padding:2rem 1.7rem;border-radius:var(--radius);
  background:linear-gradient(165deg,rgba(255,255,255,.065),rgba(255,255,255,.015));
  border:1px solid var(--line);position:relative;overflow:hidden;
  transition:transform .45s var(--ease),border-color .35s,box-shadow .45s;
}
.svc::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--grad-gold);transform:scaleX(0);transform-origin:left;
  transition:transform .5s var(--ease);
}
.svc:hover{transform:translateY(-8px);border-color:rgba(232,177,76,.35);box-shadow:var(--shadow)}
.svc:hover::after{transform:scaleX(1)}
.svc__icon{
  width:54px;height:54px;border-radius:14px;margin-bottom:1.2rem;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,rgba(232,177,76,.18),rgba(56,215,224,.12));
  border:1px solid rgba(232,177,76,.28);color:var(--gold);
}
.svc__icon svg{width:26px;height:26px}
.svc h3{font-size:1.14rem;font-weight:700;margin-bottom:.6rem}
.svc p{font-size:.9rem;color:var(--txt-mid);margin-bottom:1.1rem}
.svc__meta{
  font-size:.76rem;color:var(--cyan);letter-spacing:.04em;
  padding-top:.9rem;border-top:1px dashed var(--line);display:block;
}

/* ============ 关于我们 ============ */
.about__inner{display:grid;grid-template-columns:1.15fr .85fr;gap:4rem;align-items:start}
.about__p{color:var(--txt-mid);margin-bottom:1.2rem;font-size:1rem}

.milestones{margin-top:2.4rem;border-left:1px solid var(--line);padding-left:1.8rem}
.milestones li{position:relative;padding-bottom:1.5rem}
.milestones li::before{
  content:"";position:absolute;left:calc(-1.8rem - 5px);top:.62rem;
  width:9px;height:9px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 0 4px rgba(232,177,76,.16);
}
.milestones b{display:block;color:var(--gold);font-size:1.05rem;letter-spacing:.06em}
.milestones span{font-size:.9rem;color:var(--txt-mid)}

.about__side{display:flex;flex-direction:column;gap:1.4rem}
.quote-card{
  position:relative;padding:2.2rem 1.9rem 1.8rem;border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(232,177,76,.14),rgba(123,107,255,.1));
  border:1px solid rgba(232,177,76,.28);
}
.quote-card__mark{
  position:absolute;top:.2rem;left:1.4rem;font-size:4.4rem;line-height:1;
  color:rgba(232,177,76,.34);font-family:Georgia,serif;
}
.quote-card p{font-size:1.08rem;line-height:1.7;margin-bottom:1.4rem;position:relative}
.quote-card__by b{display:block;font-size:.98rem}
.quote-card__by span{font-size:.8rem;color:var(--txt-dim)}

.badge-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.badge{
  padding:1.3rem 1rem;text-align:center;border-radius:var(--radius-sm);
  background:var(--glass);border:1px solid var(--line);
  transition:border-color .35s,transform .35s var(--ease);
}
.badge:hover{border-color:rgba(56,215,224,.4);transform:translateY(-4px)}
.badge b{display:block;font-size:1.5rem;font-weight:800;color:var(--cyan)}
.badge span{font-size:.78rem;color:var(--txt-dim)}

/* ============ 联系表单 ============ */
.contact__inner{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}
.contact__info{margin-top:2.6rem;display:grid;gap:1.2rem}
.contact__info li{
  display:grid;grid-template-columns:88px 1fr;gap:1rem;align-items:baseline;
  padding-bottom:1.2rem;border-bottom:1px solid var(--line);
}
.contact__info span{font-size:.8rem;color:var(--txt-dim);letter-spacing:.08em}
.contact__info b{font-size:.98rem;font-weight:600}

.form{
  padding:2.2rem;border-radius:var(--radius);
  background:linear-gradient(165deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.field{display:block;margin-bottom:1.1rem}
.field span{display:block;font-size:.84rem;color:var(--txt-mid);margin-bottom:.5rem}
.field input,.field select,.field textarea{
  width:100%;padding:.82rem 1rem;border-radius:var(--radius-sm);
  background:rgba(5,11,26,.55);border:1px solid var(--line);
  font-size:.94rem;transition:border-color .3s,box-shadow .3s,background .3s;
  outline:none;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:var(--txt-dim)}
.field select{cursor:pointer;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%236d7f9e' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 1rem center;padding-right:2.4rem;
}
.field select option{background:var(--ink-2);color:var(--txt)}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--gold);box-shadow:0 0 0 3px rgba(232,177,76,.16);
  background:rgba(5,11,26,.75);
}
.field .is-error{border-color:#ff6b6b;box-shadow:0 0 0 3px rgba(255,107,107,.14)}

.form__note{margin-top:.9rem;font-size:.86rem;min-height:1.3em;text-align:center}
.form__note.is-ok{color:var(--cyan)}
.form__note.is-bad{color:#ff8b8b}

/* ============ 页脚 ============ */
.footer{
  position:relative;z-index:1;border-top:1px solid var(--line);
  background:rgba(5,11,26,.6);padding-top:3.5rem;
}
.footer__inner{display:grid;grid-template-columns:1.2fr 2fr;gap:3rem;padding-bottom:2.6rem}
.footer__brand p{font-size:.9rem;color:var(--txt-dim);margin-top:1rem;max-width:32ch}
.logo--footer .logo__mark{width:40px}
.footer__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}
.footer__cols h4{font-size:.92rem;margin-bottom:1rem;color:var(--gold);font-weight:700}
.footer__cols a{
  display:block;font-size:.88rem;color:var(--txt-dim);
  padding:.32rem 0;transition:color .3s,transform .3s;
}
.footer__cols a:hover{color:var(--txt);transform:translateX(3px)}
.footer__bottom{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding:1.4rem 0;border-top:1px solid var(--line);
  font-size:.8rem;color:var(--txt-dim);
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--grad-gold);color:#231604;font-size:1.15rem;font-weight:700;
  box-shadow:var(--shadow-gold);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:.4s var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-4px)}

/* ============ 滚动入场动画 ============ */
/* 仅在 JS 成功接管后（html.js-on）才隐藏，避免脚本出错导致内容永久不可见 */
.js-on .reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js-on .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}
.reveal[data-delay="4"]{transition-delay:.4s}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .hero__inner{grid-template-columns:1fr;gap:3rem}
  .hero__visual{order:-1}
  .lens-stage{width:min(100%,380px)}
  .flow__list{grid-template-columns:repeat(2,1fr)}
  .flow__line{display:none}
  .about__inner,.contact__inner{grid-template-columns:1fr;gap:3rem}
  .footer__inner{grid-template-columns:1fr}
}

@media (max-width:860px){
  html{scroll-padding-top:72px}
  .header__inner{height:66px}
  .burger{display:flex}
  .nav{
    position:fixed;inset:66px 0 auto;flex-direction:column;align-items:stretch;
    gap:0;padding:1rem 1.25rem 2rem;
    background:rgba(5,11,26,.97);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .45s var(--ease);
  }
  .nav.is-open{transform:none}
  .nav__link{padding:.95rem 0;border-bottom:1px solid var(--line);font-size:1rem}
  .nav__link::after{display:none}
  .nav__cta{margin:1.2rem 0 0;justify-content:center}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .footer__cols{grid-template-columns:1fr 1fr}
  .form{padding:1.6rem}
}

@media (max-width:560px){
  .hero__stats{grid-template-columns:1fr 1fr;gap:1.6rem 1rem}
  .flow__list{grid-template-columns:1fr}
  .form__row{grid-template-columns:1fr;gap:0}
  .trustbar__list{gap:1.2rem}
  .btn{padding:.82rem 1.5rem}
  .hero__actions{flex-direction:column;align-items:stretch}
  .hero__actions .btn{width:100%}
  .contact__info li{grid-template-columns:1fr;gap:.2rem}
  .footer__bottom{flex-direction:column;text-align:center}
}

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