:root{
  --green-900:#0c1410;
  --green-800:#13241b;
  --green-700:#2f4a3a;
  --green-500:#4a6b54;
  --sand-50:#faf8f2;
  --sand-100:#f3efe4;
  --sand-200:#e7e0cf;
  --gold:#b8895a;
  --gold-soft:#c9a063;
  --gold-bright:#e7c08a;
  --ink:#2a2a26;
  --ink-soft:#6b6a62;
  --bar-h:58px;
  --foot-h:34px;
  --radius:16px;
  --shadow:0 10px 30px rgba(12,20,16,.14);
  --gold-line:rgba(184,137,90,.55);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:#000;
  -webkit-font-smoothing:antialiased;
  overscroll-behavior-y:none;
}
img{display:block;max-width:100%;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
a{color:inherit;}

/* 全局星空背景（fixed，滚动时始终在内容下方保持深色动态） */
.stars{position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;z-index:-10;display:block;pointer-events:none;}

/* ============ 顶部浮层导航 ============ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  transition:background .35s ease, backdrop-filter .35s ease, box-shadow .35s ease, padding .35s ease;
  padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;
}
.topbar.scrolled{
  background:rgba(0,0,0,.72);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  box-shadow:0 2px 20px rgba(0,0,0,.3);
  padding-top:calc(env(safe-area-inset-top) + 8px);
  padding-bottom:8px;
}
.bar-inner{display:flex;align-items:center;justify-content:flex-end;max-width:1180px;margin:0 auto;}
.brand{display:none;}
.brand-mark{display:none;}
.brand-name{display:none;}

.tabs{display:none;}
.tab{display:none;}
.tab.active{display:none;}
.tab-call{
  display:inline-flex;align-items:center;gap:4px;text-decoration:none;
  padding:5px 10px;border-radius:999px;
  font-size:12px;font-weight:600;
  background:rgba(184,137,90,.22);color:var(--gold-bright);
  border:1px solid rgba(184,137,90,.4);
  white-space:nowrap;
}
.tab-call:active{background:rgba(184,137,90,.4);}
.call-ico{font-size:12px;}

/* ============ 沉浸首屏 Hero ============ */
.hero{
  position:relative;min-height:100svh;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;isolation:isolate;
  background:transparent;
  padding:0 20px;
}
.hero-bg{
  position:absolute;inset:0;z-index:-3;
  background:none;
}
.hero-glow{position:absolute;z-index:-2;border-radius:50%;filter:blur(50px);opacity:0;pointer-events:none;}
.hero-glow.g1{
  width:60vw;height:60vw;left:-15vw;top:8vh;
  background:radial-gradient(circle, rgba(30,60,120,.7), transparent 70%);
  animation:float1 14s ease-in-out infinite;
}
.hero-glow.g2{
  width:55vw;height:55vw;right:-18vw;bottom:4vh;
  background:radial-gradient(circle, rgba(80,40,120,.5), transparent 70%);
  animation:float2 18s ease-in-out infinite;
}
.hero-grain{display:none;}
@keyframes float1{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(6vw,4vh) scale(1.12);}}
@keyframes float2{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(-5vw,-3vh) scale(1.08);}}

.hero-inner{text-align:center;max-width:680px;}
.hero-kicker{
  margin:0 0 18px;font-size:13px;letter-spacing:6px;
  color:var(--gold-soft);text-transform:none;
  animation:rise .9s .1s both;
}
.hero-title{
  margin:0;position:relative;
  font-size:clamp(40px,12vw,110px);font-weight:800;letter-spacing:4px;line-height:1;
  white-space:nowrap;
  animation:rise 1s .25s both;
}
/* 内层：静态金字 + 极慢微光掠过（8s周期，大部分时间静止，偶尔一丝光泽滑过） */
.hero-title-in{
  display:inline-block;
  background:linear-gradient(100deg, var(--gold-bright) 0%, var(--gold-bright) 40%, #fff7e6 50%, var(--gold-bright) 60%, var(--gold-bright) 100%);
  background-size:250% 100%;
  background-position:50% 50%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 2px 12px rgba(184,137,90,.2));
  animation:titleShimmer 8s ease-in-out infinite;
}
.hero-slogan{
  margin:20px 0 0;font-size:clamp(15px,4.4vw,22px);letter-spacing:3px;
  color:rgba(250,248,242,.82);font-weight:300;
  animation:rise 1s .45s both;
}
.hero-scroll{
  position:absolute;left:0;right:0;bottom:7%;z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  animation:rise 1s .65s both;
  pointer-events:none;
}
.hero-scroll-text{
  font-size:13px;letter-spacing:4px;color:rgba(250,248,242,.6);
}
.hero-scroll-arrow{
  width:30px;height:30px;color:var(--gold-bright);
  filter:drop-shadow(0 0 8px rgba(184,137,90,.6));
  animation:arrowBob 1.8s ease-in-out infinite;
}
@keyframes rise{from{opacity:0;transform:translateY(34px);}to{opacity:1;transform:none;}}
@keyframes titleShimmer{
  0%,40%{background-position:50% 50%;}
  50%{background-position:80% 50%;}
  60%,100%{background-position:50% 50%;}
}
@keyframes arrowBob{
  0%,100%{transform:translateY(0);opacity:.45;}
  50%{transform:translateY(11px);opacity:1;}
}
@keyframes scrollPulse{0%,100%{transform:scaleY(.4);opacity:.4;}50%{transform:scaleY(1);opacity:1;}}

/* ============ 作品 / 案例流 ============ */
.board{
  position:relative;z-index:1;
  max-width:1180px;margin:0 auto;
  padding:calc(var(--bar-h) + 8px) 14px calc(var(--foot-h) + env(safe-area-inset-bottom) + 24px);
}
.panel{display:none;}
.panel.active{display:block;}

.board-head{margin:18px 4px 22px;text-align:center;}
.board-title{
  margin:0;font-size:clamp(26px,7vw,40px);font-weight:800;letter-spacing:3px;
  color:var(--sand-100);
  position:relative;display:inline-block;
}
.board-title::after{
  content:"";display:block;width:54px;height:3px;margin:12px auto 0;border-radius:3px;
  background:linear-gradient(90deg,var(--gold),var(--gold-bright));
}
.board-sub{margin:14px 0 0;font-size:13px;letter-spacing:2px;color:rgba(250,248,242,.55);font-weight:300;}

/* 错落瀑布流：移动端 2 列，桌面 3 列，卡片自然高度形成高低错落 */
.grid{column-count:2;column-gap:12px;}
@media(min-width:760px){.grid{column-count:3;column-gap:18px;}}

.card{
  display:block;break-inside:avoid;margin:0 0 12px;
  text-decoration:none;color:inherit;
  opacity:0;transform:translateY(30px);
  transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1);
}
.card.in{opacity:1;transform:none;}
/* 触屏设备：交错浮动延迟，让两列卡片像水面轻浮般此起彼伏 */
@media(hover:none){
  .card.in .card-tilt{animation:cardFloat 5s ease-in-out infinite;}
  .card.in:nth-child(odd) .card-tilt{animation-delay:0s;}
  .card.in:nth-child(even) .card-tilt{animation-delay:-2.5s;}
  .card.in:nth-child(3n) .card-tilt{animation-delay:-1.2s;}
  .card.in:nth-child(4n+1) .card-tilt{animation-delay:-3.8s;}
}
@media(min-width:760px){.card{margin-bottom:18px;}}
@keyframes cardFloat{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-5px);}
}

.card-tilt{
  position:relative;border-radius:var(--radius);overflow:hidden;
  background:transparent;
  border:none;
  box-shadow:0 6px 24px rgba(0,0,0,.5);
  transform-style:preserve-3d;
  transition:transform .2s ease, box-shadow .3s ease;
  will-change:transform;
}
.card:active .card-tilt{box-shadow:0 3px 12px rgba(0,0,0,.4);}
@media(hover:hover){
  .card-tilt:hover{
    box-shadow:0 12px 36px rgba(0,0,0,.6);
  }
}

.card-media{position:relative;width:100%;background:var(--sand-200);overflow:hidden;min-height:120px;}
.card-media img,
.card-media video{width:100%;height:auto;object-fit:cover;display:block;transition:transform .5s ease;}
@media(hover:hover){.card-tilt:hover .card-media img{transform:scale(1.06);}}

.card-type{
  position:absolute;left:10px;top:10px;z-index:3;
  padding:4px 10px;border-radius:999px;
  font-size:11px;font-weight:600;color:#fff;
  background:rgba(12,20,16,.55);backdrop-filter:blur(4px);
  border:1px solid rgba(255,255,255,.18);
}

.card-title{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:18px 10px 8px;
  font-size:13px;font-weight:600;color:#fff;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  background:linear-gradient(to top, rgba(0,0,0,.6), transparent);
}

.card-play{
  position:absolute;inset:0;z-index:2;display:flex;align-items:center;justify-content:center;
  pointer-events:none;
}
.card-play::after{
  content:"";width:50px;height:50px;border-radius:50%;
  background:rgba(0,0,0,.4);
  box-shadow:0 0 0 7px rgba(255,255,255,.22);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'><path d='M8 5v14l11-7z'/></svg>");
  background-repeat:no-repeat;background-position:center;background-size:24px;
  transition:transform .3s ease;
}
@media(hover:hover){.card-tilt:hover .card-play::after{transform:scale(1.12);}}

/* 鼠标光斑（桌面） */
.card-spot{
  position:absolute;inset:0;z-index:4;pointer-events:none;opacity:0;
  background:radial-gradient(120px 120px at var(--mx,50%) var(--my,50%), rgba(255,255,255,.28), transparent 60%);
  transition:opacity .3s ease;mix-blend-mode:overlay;
}
@media(hover:hover){.card-tilt:hover .card-spot{opacity:1;}}

/* ============ 底部备案号 ============ */
.foot{
  position:fixed;left:0;right:0;bottom:0;z-index:55;
  padding:calc(env(safe-area-inset-bottom) + 7px) 0 7px;
  text-align:center;font-size:11px;color:rgba(250,248,242,.5);
  background:rgba(0,0,0,.82);
  border-top:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}

/* ============ 媒体查看器（保留原逻辑样式） ============ */
.viewer{position:fixed;inset:0;z-index:100;background:#0c120e;display:flex;flex-direction:column;}
.viewer[hidden]{display:none;}
.viewer-bar{
  display:flex;align-items:center;justify-content:space-between;
  padding:calc(env(safe-area-inset-top) + 10px) 12px 10px;
  color:#fff;background:rgba(0,0,0,.35);
}
.v-btn{color:#fff;font-size:15px;padding:6px 12px;border-radius:8px;background:rgba(255,255,255,.12);}
.v-btn:active{background:rgba(255,255,255,.28);}
.v-counter{font-size:13px;color:rgba(255,255,255,.8);}
.viewer-stage{flex:1;position:relative;overflow:hidden;touch-action:none;}
.v-track{display:flex;height:100%;transition:transform .28s ease;will-change:transform;}
.v-slide{flex:0 0 100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.v-zoom{transform-origin:center center;will-change:transform;}
.v-slide img{max-width:100%;max-height:100%;object-fit:contain;}
.v-slide video{max-width:100%;max-height:100%;object-fit:contain;background:#000;}

/* ============ 浮动留言按钮 + 弹窗（手机版） ============ */
.contact-fab{
  position:fixed;right:16px;bottom:calc(var(--foot-h) + env(safe-area-inset-bottom) + 16px);z-index:58;
  width:48px;height:48px;border-radius:50%;border:none;
  background:linear-gradient(135deg,#b8895a,#d4a76a);
  color:#fff;font-size:20px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 14px rgba(184,137,90,.45);
  cursor:pointer;
}
.contact-fab:active{transform:scale(.92);}
.contact-overlay{
  position:fixed;inset:0;z-index:90;
  background:rgba(0,0,0,.6);
  display:none;align-items:flex-end;justify-content:center;
}
.contact-overlay.open{display:flex;}
.contact-card{
  background:#fff;border-radius:18px 18px 0 0;padding:22px 18px 28px;
  width:100%;max-width:480px;max-height:85vh;overflow-y:auto;
  position:relative;
}
.contact-card h3{margin:0 0 4px;font-size:18px;color:#2f4a3a;font-weight:700;}
.contact-card .csub{margin:0 0 14px;font-size:12px;color:#6b6a62;}
.contact-card .c-close{
  position:absolute;top:12px;right:12px;
  width:28px;height:28px;border-radius:50%;border:none;
  background:#f3efe4;color:#2a2a26;font-size:16px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.contact-card .cf{margin-bottom:12px;}
.contact-card .cf label{display:block;font-size:13px;color:#5a5a52;font-weight:500;margin-bottom:4px;}
.contact-card .cf input,
.contact-card .cf select,
.contact-card .cf textarea{
  width:100%;padding:10px;border:1px solid #ddd4bf;border-radius:8px;font-size:14px;
  font-family:inherit;background:#fff;box-sizing:border-box;
}
.contact-card .cf input:focus,
.contact-card .cf select:focus,
.contact-card .cf textarea:focus{outline:none;border-color:#b8895a;box-shadow:0 0 0 2px rgba(184,137,90,.18);}
.contact-card .cf textarea{height:72px;resize:vertical;}
.contact-card .csubmit{
  width:100%;padding:12px;border:none;border-radius:8px;
  background:#2f4a3a;color:#faf8f2;font-size:15px;font-weight:600;
  cursor:pointer;margin-top:4px;
}
.contact-card .csubmit:active{background:#3d5a46;}
.contact-card .cmsg{font-size:13px;min-height:18px;margin-top:8px;text-align:center;}

/* 尊重减少动画偏好 */
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}