/* ==========================================================
   环美全案设计 · huanmei.design
   深色高级感 / 大留白 / 强对比
   ========================================================== */

:root{
  --bg:#0a0a0b;
  --bg-2:#111113;
  --bg-3:#17171a;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --txt:#f2f2f0;
  --txt-2:#a8a8a4;
  --txt-3:#6b6b67;
  --acc:#c9a961;          /* 香槟金 */
  --acc-2:#e0c98a;
  --max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,iframe{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* ==================== 导航 ==================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .5s var(--ease),border-color .5s var(--ease),backdrop-filter .5s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(10,10,11,.88);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom-color:var(--line);
}
.nav-inner{
  max-width:var(--max);margin:0 auto;padding:0 28px;
  height:76px;display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:11px}
.logo-mark{
  width:40px;height:40px;border:1px solid var(--acc);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;letter-spacing:.06em;color:var(--acc);
  font-weight:600;flex-shrink:0;
}
.logo-txt{
  display:flex;flex-direction:column;line-height:1.15;
  font-size:14px;letter-spacing:.14em;font-weight:500;
}
.logo-txt em{
  font-style:normal;font-size:9px;letter-spacing:.3em;
  color:var(--txt-3);margin-top:3px;
}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{
  font-size:13.5px;color:var(--txt-2);letter-spacing:.04em;
  transition:color .3s;position:relative;
}
.nav-links a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;
  background:var(--acc);transition:width .35s var(--ease);
}
.nav-links a:not(.nav-cta):hover{color:var(--txt)}
.nav-links a:not(.nav-cta):hover::after{width:100%}
.nav-cta{
  border:1px solid var(--line-2);padding:9px 20px;
  transition:all .35s var(--ease);
}
.nav-cta:hover{background:var(--acc);border-color:var(--acc);color:#0a0a0b}

.nav-toggle{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:8px;
}
.nav-toggle span{
  width:22px;height:1.5px;background:var(--txt);
  transition:all .35s var(--ease);
}

/* ==================== 首屏 ==================== */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:center;
  padding:120px 0 80px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(ellipse 70% 55% at 78% 18%, rgba(201,169,97,.13), transparent 62%),
    radial-gradient(ellipse 60% 50% at 15% 82%, rgba(201,169,97,.06), transparent 60%),
    linear-gradient(170deg,#0a0a0b 0%,#111113 55%,#0a0a0b 100%);
}
/* 细网格纹理 */
.hero-grain{
  position:absolute;inset:0;z-index:1;opacity:.35;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:88px 88px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 45%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 45%,#000 30%,transparent 78%);
}
.hero-inner{
  position:relative;z-index:2;
  max-width:var(--max);margin:0 auto;padding:0 28px;width:100%;
}
.hero-eyebrow{
  font-size:12.5px;letter-spacing:.28em;color:var(--acc);
  margin-bottom:34px;text-transform:uppercase;
  opacity:0;animation:fadeUp .9s var(--ease) .1s forwards;
}
.hero-title{
  font-size:clamp(38px,6.4vw,82px);
  line-height:1.14;font-weight:600;letter-spacing:-.01em;
  opacity:0;animation:fadeUp .9s var(--ease) .25s forwards;
}
.hero-title .accent{
  color:var(--acc);
  position:relative;display:inline-block;
}
.hero-title .accent::after{
  content:"";position:absolute;left:0;bottom:.08em;
  width:100%;height:2px;background:var(--acc);
  transform:scaleX(0);transform-origin:left;
  animation:lineIn 1s var(--ease) 1.1s forwards;
}
.hero-sub{
  margin-top:32px;font-size:clamp(15px,1.7vw,18px);
  color:var(--txt-2);line-height:1.85;max-width:640px;
  opacity:0;animation:fadeUp .9s var(--ease) .4s forwards;
}

.hero-stats{
  display:flex;gap:0;margin-top:64px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:38px;
  opacity:0;animation:fadeUp .9s var(--ease) .55s forwards;
}
.stat{
  flex:1;min-width:180px;padding-right:38px;
  border-right:1px solid var(--line);
  margin-right:38px;
}
.stat:last-child{border-right:none;margin-right:0;padding-right:0}
.stat b{
  display:block;font-size:clamp(30px,3.6vw,44px);
  font-weight:600;color:var(--acc);line-height:1;letter-spacing:-.02em;
}
.stat b small{font-size:.46em;font-weight:400;margin-left:2px}
.stat > span{
  display:block;margin-top:14px;font-size:13.5px;color:var(--txt);
  line-height:1.5;letter-spacing:.02em;
}
.stat > span em{
  display:block;font-style:normal;font-size:12px;
  color:var(--txt-3);margin-top:4px;
}

.hero-actions{
  display:flex;gap:16px;margin-top:56px;flex-wrap:wrap;
  opacity:0;animation:fadeUp .9s var(--ease) .7s forwards;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 38px;font-size:14px;letter-spacing:.06em;
  transition:all .4s var(--ease);border:1px solid transparent;
}
.btn-primary{background:var(--acc);color:#0a0a0b;font-weight:500}
.btn-primary:hover{background:var(--acc-2);transform:translateY(-2px)}
.btn-ghost{border-color:var(--line-2);color:var(--txt)}
.btn-ghost:hover{border-color:var(--acc);color:var(--acc);transform:translateY(-2px)}

.scroll-hint{
  position:absolute;left:50%;bottom:36px;transform:translateX(-50%);
  z-index:3;display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:10.5px;letter-spacing:.28em;color:var(--txt-3);
  animation:float 2.6s ease-in-out infinite;
}

@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
.hero-eyebrow,.hero-title,.hero-sub,.hero-stats,.hero-actions{transform:translateY(26px)}
@keyframes lineIn{to{transform:scaleX(1)}}
@keyframes float{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ==================== 通用区块 ==================== */
.sec{padding:130px 0;position:relative}
.sec-head{margin-bottom:64px;max-width:760px}
.sec-num{
  display:block;font-size:11.5px;letter-spacing:.3em;
  color:var(--acc);margin-bottom:20px;font-weight:500;
}
.sec-head h2{
  font-size:clamp(27px,3.9vw,46px);
  font-weight:600;line-height:1.24;letter-spacing:-.01em;
}
.sec-desc{
  margin-top:20px;font-size:15.5px;color:var(--txt-2);line-height:1.8;
}

/* 滚动渐显 */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.on{opacity:1;transform:translateY(0)}

/* ==================== 设计理念 ==================== */
.concept{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.concept-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line)}
.concept-card{
  background:var(--bg-2);padding:46px 42px;
  transition:background .45s var(--ease);
}
.concept-card:hover{background:var(--bg-3)}
.concept-ico{
  font-size:26px;color:var(--acc);margin-bottom:22px;
  line-height:1;
}
.concept-card h3{
  font-size:19px;font-weight:600;margin-bottom:14px;letter-spacing:.01em;
}
.concept-card p{font-size:14.5px;color:var(--txt-2);line-height:1.85}

/* ==================== 作品 ==================== */
.work-list{display:flex;flex-direction:column;gap:110px}
.work{
  display:grid;grid-template-columns:1.15fr 1fr;
  gap:56px;align-items:start;
}
.work.reverse{grid-template-columns:1fr 1.15fr}
.work.reverse .work-visual{order:2}
.work.reverse .work-body{order:1}

.work-visual{position:relative}
.vr-card{
  position:relative;display:block;width:100%;aspect-ratio:16/10;
  background:#000;border:1px solid var(--line);overflow:hidden;
  transition:border-color .45s var(--ease);
}
.vr-card:hover{border-color:rgba(201,169,97,.5)}
.vr-cover{
  width:100%;height:100%;object-fit:cover;display:block;
  transition:transform 1.1s var(--ease),filter .5s var(--ease);
  filter:brightness(.86) saturate(1.02);
}
.vr-card:hover .vr-cover{transform:scale(1.045);filter:brightness(.95) saturate(1.05)}
.vr-shade{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,10,11,.08) 0%,rgba(10,10,11,.22) 55%,rgba(10,10,11,.62) 100%);
  transition:opacity .45s;
}
.vr-card:hover .vr-shade{opacity:.8}

/* 中央播放按钮 */
.vr-play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  display:flex;flex-direction:column;align-items:center;gap:11px;
  text-align:center;pointer-events:none;
  transition:transform .5s var(--ease);
}
.vr-card:hover .vr-play{transform:translate(-50%,-50%) scale(1.06)}
.vr-play i{
  width:62px;height:62px;border-radius:50%;
  border:1px solid rgba(255,255,255,.55);
  display:flex;align-items:center;justify-content:center;
  background:rgba(10,10,11,.42);backdrop-filter:blur(8px);
  position:relative;transition:all .45s var(--ease);
}
.vr-play i::after{
  content:"";width:0;height:0;margin-left:4px;
  border-left:13px solid #fff;
  border-top:8px solid transparent;border-bottom:8px solid transparent;
}
.vr-card:hover .vr-play i{
  border-color:var(--acc);background:rgba(201,169,97,.2);
}
.vr-card:hover .vr-play i::after{border-left-color:var(--acc-2)}
.vr-play b{
  font-size:14px;font-weight:500;letter-spacing:.1em;color:#fff;
  text-shadow:0 2px 14px rgba(0,0,0,.7);
}
.vr-play em{
  font-style:normal;font-size:11.5px;color:rgba(255,255,255,.72);
  letter-spacing:.06em;text-shadow:0 1px 10px rgba(0,0,0,.8);
}
.work-badge{
  position:absolute;left:16px;top:16px;
  background:rgba(10,10,11,.82);backdrop-filter:blur(10px);
  border:1px solid var(--line-2);
  padding:7px 15px;font-size:11.5px;letter-spacing:.1em;color:var(--acc);
  z-index:2;
}

.work-meta{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:22px}
.tag{
  font-size:11.5px;letter-spacing:.08em;color:var(--txt-2);
  border:1px solid var(--line-2);padding:5px 13px;
}
.work-body h3{
  font-size:clamp(22px,2.5vw,30px);font-weight:600;
  line-height:1.3;margin-bottom:18px;letter-spacing:-.005em;
}
.work-lead{
  font-size:15.5px;color:var(--txt-2);line-height:1.85;
  padding-bottom:28px;border-bottom:1px solid var(--line);margin-bottom:28px;
}
.work-lead strong{color:var(--txt);font-weight:500}
.work-points{display:flex;flex-direction:column;gap:20px}
.wp{display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:start}
.wp b{
  font-size:12px;letter-spacing:.14em;color:var(--acc);
  padding-top:3px;font-weight:500;
}
.wp span{font-size:14.5px;color:var(--txt-2);line-height:1.8}
.work-rooms{
  margin-top:30px;padding-top:24px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--txt-3);line-height:1.9;letter-spacing:.02em;
}
.works-note{
  margin-top:90px;padding:38px 42px;
  background:var(--bg-2);border:1px solid var(--line);
  border-left:2px solid var(--acc);
}
.works-note p{font-size:15px;color:var(--txt-2);line-height:1.85}
.works-note a{color:var(--acc);border-bottom:1px solid rgba(201,169,97,.4)}

/* ==================== 全案服务 ==================== */
.service{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.service-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--line);border:1px solid var(--line);
}
.svc{
  background:var(--bg-2);padding:38px 34px;
  transition:background .45s var(--ease);
}
.svc:hover{background:var(--bg-3)}
.svc b{
  display:block;font-size:20px;font-weight:600;
  color:var(--acc);margin-bottom:12px;letter-spacing:.04em;
}
.svc span{font-size:13.8px;color:var(--txt-2);line-height:1.8}
.service-quote{
  margin-top:64px;text-align:center;
  font-size:clamp(16px,2.2vw,22px);line-height:1.8;
  color:var(--txt-2);letter-spacing:.01em;
}
.service-quote strong{color:var(--txt);font-weight:500}

/* ==================== 流程 ==================== */
.steps{
  list-style:none;display:grid;
  grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);
}
.steps li{
  background:var(--bg);padding:34px 38px;
  transition:background .4s var(--ease);position:relative;
}
.steps li:hover{background:var(--bg-2)}
.step-n{
  display:inline-block;font-size:11px;letter-spacing:.2em;
  color:var(--acc);border:1px solid rgba(201,169,97,.35);
  padding:3px 10px;margin-bottom:16px;font-weight:500;
}
.steps h4{font-size:17px;font-weight:600;margin-bottom:11px;letter-spacing:.01em}
.steps p{font-size:14px;color:var(--txt-2);line-height:1.8}

/* ==================== 关于 ==================== */
.about{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:80px;align-items:start}
.about-lead{
  font-size:clamp(17px,2vw,21px);line-height:1.75;
  color:var(--txt);margin-bottom:28px;font-weight:400;
}
.about-text p{
  font-size:15px;color:var(--txt-2);line-height:1.9;margin-bottom:20px;
}
.about-text strong{color:var(--txt);font-weight:500}
.about-facts{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line)}
.fact{background:var(--bg-3);padding:24px 26px}
.fact b{display:block;font-size:15.5px;font-weight:600;margin-bottom:6px;letter-spacing:.01em}
.fact span{font-size:12.5px;color:var(--txt-3);letter-spacing:.02em}

/* ==================== 联系 ==================== */
.contact{
  background:
    radial-gradient(ellipse 60% 60% at 50% 0%, rgba(201,169,97,.09), transparent 65%),
    var(--bg);
}
.contact-inner{max-width:860px}
.contact-lead{
  font-size:clamp(17px,2.2vw,23px);line-height:1.75;
  color:var(--txt);margin-bottom:56px;
}
.contact-methods{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--line);border:1px solid var(--line);
  margin-bottom:44px;
}
.cm{
  background:var(--bg-2);padding:32px 30px;
  transition:background .4s var(--ease);
}
.cm:hover{background:var(--bg-3)}
.cm-label{
  display:block;font-size:11px;letter-spacing:.22em;
  color:var(--acc);margin-bottom:14px;
}
.cm b{display:block;font-size:16px;font-weight:600;margin-bottom:8px;line-height:1.4}
.cm a,.cm-sub{font-size:13px;color:var(--txt-2);display:block}
.cm a{border-bottom:1px solid rgba(201,169,97,.35);display:inline-block;transition:color .3s}
.cm a:hover{color:var(--acc)}
.contact-note{
  font-size:14px;color:var(--txt-2);line-height:1.9;
  padding:26px 30px;background:var(--bg-2);border-left:2px solid var(--acc);
}
.contact-note strong{color:var(--txt);font-weight:500}

/* ==================== 页脚 ==================== */
.footer{border-top:1px solid var(--line);background:var(--bg);padding:56px 0 40px}
.foot-top{
  display:flex;justify-content:space-between;align-items:flex-start;
  gap:40px;flex-wrap:wrap;padding-bottom:36px;border-bottom:1px solid var(--line);
}
.foot-brand b{display:block;font-size:16px;letter-spacing:.08em;margin-bottom:7px}
.foot-brand span{font-size:12.5px;color:var(--txt-3);letter-spacing:.03em}
.foot-links{display:flex;gap:28px;flex-wrap:wrap}
.foot-links a{font-size:13px;color:var(--txt-2);transition:color .3s}
.foot-links a:hover{color:var(--acc)}
.foot-bot{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding-top:28px;font-size:12px;color:var(--txt-3);letter-spacing:.03em;
}

/* ==================== 响应式 ==================== */
@media(max-width:1024px){
  .work,.work.reverse{grid-template-columns:1fr;gap:38px}
  .work.reverse .work-visual,.work.reverse .work-body{order:0}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:768px){
  .wrap{padding:0 20px}
  .nav-inner{height:64px;padding:0 20px}
  .nav-links{
    position:fixed;top:64px;left:0;right:0;
    background:rgba(10,10,11,.98);backdrop-filter:blur(20px);
    flex-direction:column;align-items:flex-start;gap:0;
    padding:12px 20px 24px;
    border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .45s var(--ease);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{
    width:100%;padding:15px 0;font-size:15px;
    border-bottom:1px solid var(--line);
  }
  .nav-links a:last-child{border-bottom:none}
  .nav-cta{margin-top:14px;text-align:center;padding:14px 20px}
  .nav-toggle{display:flex}
  .nav-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

  .hero{padding:100px 0 70px;min-height:auto}
  .hero-eyebrow{font-size:11px;letter-spacing:.2em;margin-bottom:26px}
  .hero-sub{margin-top:26px;font-size:15px}
  .hero-stats{margin-top:44px;padding-top:30px;flex-direction:column;gap:0}
  .stat{
    border-right:none;margin-right:0;padding-right:0;
    border-bottom:1px solid var(--line);padding:20px 0;
    min-width:0;
  }
  .stat:last-child{border-bottom:none;padding-bottom:0}
  .hero-actions{margin-top:40px;gap:12px}
  .btn{flex:1;padding:14px 20px;font-size:13.5px}
  .scroll-hint{display:none}

  .sec{padding:82px 0}
  .sec-head{margin-bottom:44px}
  .sec-num{margin-bottom:14px}
  .concept-grid{grid-template-columns:1fr}
  .concept-card{padding:34px 26px}
  .work-list{gap:70px}
  .work-body h3{font-size:22px}
  .wp{grid-template-columns:1fr;gap:6px}
  .wp b{padding-top:0}
  .service-grid{grid-template-columns:1fr}
  .svc{padding:30px 26px}
  .service-quote{margin-top:44px;font-size:16px}
  .steps{grid-template-columns:1fr}
  .steps li{padding:28px 24px}
  .contact-methods{grid-template-columns:1fr}
  .cm{padding:26px 24px}
  .contact-note{padding:22px 24px;font-size:13.5px}
  .works-note{margin-top:56px;padding:28px 24px}
  .foot-bot{flex-direction:column;gap:8px}
}

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