/* ============================================================
   不周山 BUZHOU — 官网样式表
   石墨黑 · 铜金 · 米白 / 提案感版式 / 响应式 / 无外部依赖
   品牌体系：与 Logo「错位·相承」同源
   ============================================================ */

:root{
  /* —— 底色：石墨黑 —— */
  --bg:#1C1B19;
  --bg-2:#171614;
  --bg-alt:#22201D;

  /* —— 面板：米白极淡，靠明度分层而非硬边框 —— */
  --panel:rgba(242,237,228,.030);
  --panel-2:rgba(242,237,228,.055);
  --line:rgba(242,237,228,.09);
  --line-2:rgba(242,237,228,.16);

  /* —— 文本：米白 —— */
  --text:#F2EDE4;
  --text-2:#B5ADA1;
  --text-3:#857D71;

  /* —— 强调：铜金单色（不用青紫渐变） —— */
  --gold:#C9A227;
  --gold-dim:#8A6A2F;
  --gold-logo:#EFC93F;
  --gold-soft:rgba(201,162,39,.10);
  --gold-line:rgba(201,162,39,.28);
  --grad:linear-gradient(120deg,#C9A227,#8A6A2F);

  /* —— 警示：朱砂 —— */
  --cinnabar:#D0553F;

  --radius:22px;
  --radius-sm:14px;
  --nav-h:76px;
  --maxw:1180px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;line-height:1.32;letter-spacing:-.015em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px;}

/* ---------- 滚动进度条 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:200;
  background:transparent;pointer-events:none;
}
.scroll-progress span{
  display:block;height:100%;width:0;background:var(--gold);
  transition:width .1s linear;
}

/* ============================================================
   导航
   ============================================================ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:150;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(28,27,25,.55);
  backdrop-filter:saturate(140%) blur(16px);
  -webkit-backdrop-filter:saturate(140%) blur(16px);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s;
}
.nav.scrolled{
  background:rgba(28,27,25,.9);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}

.logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.logo-mark{width:36px;height:36px;flex-shrink:0;color:var(--gold-logo);}
.logo-text{
  font-size:19px;font-weight:700;letter-spacing:.1em;line-height:1.1;
  display:flex;flex-direction:column;color:var(--text);
}
.logo-text em{
  font-style:normal;font-size:9px;font-weight:500;letter-spacing:.38em;
  color:var(--text-3);margin-top:2px;
}

.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;padding:8px 14px;font-size:14.5px;color:var(--text-2);
  border-radius:8px;transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--text);}
.nav-link.active{color:var(--gold);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:1px;
  background:var(--gold);
}
.nav-cta{margin-left:14px;}

/* 汉堡按钮 */
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);
  background:transparent;border-radius:12px;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .2s;
}
.nav-toggle span{
  display:block;width:18px;height:1.4px;background:var(--text);border-radius:2px;
  transition:transform .3s,opacity .2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.4px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.4px) rotate(-45deg);}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  letter-spacing:.02em;
  transition:transform .2s,background .25s,border-color .25s,color .2s;
}
.btn-primary{
  background:var(--gold);color:#14110E;
}
.btn-primary:hover{background:#DBB42F;transform:translateY(-2px);}
.btn-ghost{
  background:transparent;border-color:var(--line-2);color:var(--text);
}
.btn-ghost:hover{border-color:var(--gold-line);color:var(--gold);transform:translateY(-2px);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-block{width:100%;}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  display:flex;align-items:center;
  padding:calc(var(--nav-h) + 70px) 0 100px;
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden;}

/* 极淡宣纸网格，不抢主体 */
.grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(242,237,228,.022) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(242,237,228,.022) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 78% 58% at 45% 42%,#000 35%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 78% 58% at 45% 42%,#000 35%,transparent 100%);
}

/* 品牌天柱「错位·相承」—— Hero 主视觉，取代原脉冲柱 */
.hero-pillar{
  position:absolute;right:3%;bottom:0;height:76%;
  width:auto;opacity:.085;pointer-events:none;
}
.hero-pillar svg{height:100%;width:auto;fill:var(--gold);}

.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.12fr .88fr;gap:72px;align-items:center;
}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 16px 7px 12px;border:1px solid var(--line);border-radius:999px;
  background:transparent;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--text-3);
  text-transform:uppercase;
}
.eyebrow .dot{
  width:6px;height:6px;border-radius:50%;background:var(--gold);flex-shrink:0;
}

.hero-title{
  margin:30px 0 24px;
  font-size:clamp(42px,6vw,78px);font-weight:800;line-height:1.08;letter-spacing:-.035em;
  color:var(--text);
}
.hero-title small{
  display:block;margin-top:22px;font-size:clamp(16px,1.9vw,22px);font-weight:400;
  letter-spacing:.06em;color:var(--text-2);line-height:1.6;
}
.hero-desc{max-width:600px;font-size:16.5px;color:var(--text-2);line-height:1.95;}
.hero-desc strong{color:var(--text);font-weight:600;}

.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:40px 0 52px;}

.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  padding-top:34px;border-top:1px solid var(--line);
}
.hero-stats li{display:flex;flex-direction:column;gap:6px;}
.hero-stats b{
  font-size:clamp(26px,2.9vw,36px);font-weight:800;letter-spacing:-.03em;
  color:var(--gold);
  font-variant-numeric:tabular-nums;line-height:1;
}
.hero-stats li.stat-lead b{font-size:clamp(42px,5.2vw,66px);}
.hero-stats li.stat-lead span{font-size:13px;color:var(--text-2);}
.hero-stats span{font-size:12.5px;color:var(--text-3);line-height:1.55;}

/* Hero 数据卡：去发光，铜金单色 */
.hero-visual{position:relative;display:flex;flex-direction:column;gap:16px;}
.card-float{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  animation:floatY 7s ease-in-out infinite;
}
@keyframes floatY{0%,100%{transform:translateY(0);}50%{transform:translateY(-8px);}}
.cf-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.cf-title{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--text-3);}
.cf-live{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;color:#14110E;font-weight:700;
  background:var(--gold);padding:3px 9px;border-radius:999px;
}
.cf-bars{display:flex;flex-direction:column;gap:15px;}
.cf-bar{display:grid;grid-template-columns:74px 1fr 42px;align-items:center;gap:11px;}
.cf-bar .lbl{font-size:11.5px;color:var(--text-3);white-space:nowrap;}
.cf-bar .track{height:6px;background:rgba(242,237,228,.07);border-radius:99px;overflow:hidden;}
.cf-bar .track i{
  display:block;height:100%;width:0;border-radius:99px;
  background:var(--gold-dim);
  animation:growBar 1.6s cubic-bezier(.22,1,.36,1) forwards;
}
.cf-bar.hi .track i{background:var(--gold);}
@keyframes growBar{from{width:0;}to{width:var(--w);}}
.cf-bar .val{font-family:var(--mono);font-size:13px;text-align:right;color:var(--text-2);font-variant-numeric:tabular-nums;}
.cf-bar.hi .val{color:var(--gold);font-weight:700;}
.cf-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:22px;padding-top:18px;border-top:1px solid var(--line);
  font-size:12px;color:var(--text-3);
}
.cf-pct{font-family:var(--mono);color:var(--gold);font-weight:700;}

.card-float.small{
  display:flex;gap:14px;padding:18px 20px;
  animation-duration:8s;animation-direction:reverse;
}
.cf-mini{flex:1;display:flex;flex-direction:column;gap:3px;}
.cf-mini-k{font-size:11.5px;color:var(--text-3);}
.cf-mini-v{font-size:20px;font-weight:800;color:var(--gold);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}

.scroll-hint{
  position:absolute;left:50%;bottom:30px;transform:translateX(-50%);
  width:22px;height:36px;border:1px solid var(--line);border-radius:99px;z-index:3;
  display:flex;justify-content:center;padding-top:8px;
}
.scroll-hint span{
  width:2px;height:6px;border-radius:2px;background:var(--gold);
  animation:scrollDot 2s ease-in-out infinite;
}
@keyframes scrollDot{0%{opacity:0;transform:translateY(0);}40%{opacity:1;}100%{opacity:0;transform:translateY(13px);}}

/* ============================================================
   通用 section —— 大留白，提案感
   ============================================================ */
.section{position:relative;padding:132px 0;}
.section-alt{background:var(--bg-alt);}

.sec-head{max-width:720px;margin-bottom:64px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-tag{
  display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.24em;
  color:var(--gold);margin-bottom:18px;text-transform:uppercase;
}
.sec-title{font-size:clamp(28px,3.9vw,46px);font-weight:800;letter-spacing:-.03em;line-height:1.26;}
.sec-desc{margin-top:20px;font-size:15.5px;color:var(--text-2);line-height:1.95;}
.sec-desc strong{color:var(--text);font-weight:600;}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}

/* ---------- 关于：去卡片硬边，铜金短线起手 ---------- */
.panel{
  padding:4px 0 0;
  border-top:1px solid var(--line);
  transition:border-color .35s;
}
.panel:hover{border-top-color:var(--gold-line);}
.p-ico{display:none;}
.panel h3{
  font-size:17.5px;margin:18px 0 10px;font-weight:700;letter-spacing:-.01em;
}
.panel p{font-size:14.5px;color:var(--text-2);line-height:1.9;}
.panel .p-num{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--gold);
}

/* ---------- 核心能力：编辑式列表，无边框无 chips ---------- */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px 40px;}
.cap{
  position:relative;
  padding:30px 0 30px 26px;
  border-left:1px solid var(--line);
  transition:border-color .35s;
}
.cap:hover{border-left-color:var(--gold);}
.cap-no{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--gold);
  display:block;margin-bottom:12px;
}
.cap h3{font-size:18px;margin:0 0 12px;font-weight:700;letter-spacing:-.01em;}
.cap p{font-size:14.5px;color:var(--text-2);line-height:1.9;}

/* ---------- 支持硬件 ---------- */
.hw-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;
  padding-top:34px;border-top:1px solid var(--line);
}
.hw-group h4{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--gold);
  text-transform:uppercase;font-weight:600;margin-bottom:22px;
}
.hw-list{display:flex;flex-wrap:wrap;gap:10px;}
.hw-list li{
  padding:9px 18px;border:1px solid var(--line);border-radius:999px;
  background:var(--panel);font-size:14px;color:var(--text-2);
  transition:border-color .3s,color .3s;
}
.hw-list li:hover{border-color:var(--gold-line);color:var(--gold);}

/* ---------- 技术路径 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{
  position:relative;padding-top:26px;
  border-top:1px solid var(--line);
  transition:border-color .35s;
}
.step:hover{border-top-color:var(--gold-line);}
.step-day{
  display:block;font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.14em;
  color:var(--gold);margin-bottom:14px;
}
.step h3{font-size:17px;margin-bottom:12px;font-weight:700;}
.step p{font-size:14px;color:var(--text-2);line-height:1.9;}
.step-out{
  display:block;margin-top:18px;font-size:12.5px;color:var(--text-3);
}

/* ---------- 实测表现 ---------- */
.perf-wrap{display:grid;grid-template-columns:1.55fr .85fr;gap:44px;align-items:start;}
.perf{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:38px 34px;
}
.perf-row{
  display:grid;grid-template-columns:180px 1fr 76px;align-items:center;gap:20px;
  padding:18px 0;border-bottom:1px solid var(--line);
}
.perf-row:last-of-type{border-bottom:none;}
.perf-name{font-size:14px;color:var(--text-2);}
.perf-bars{display:flex;flex-direction:column;gap:9px;}
.pb{display:flex;align-items:center;gap:11px;}
.pb i{
  display:block;height:12px;width:0;border-radius:3px;
  animation:growBar 1.4s cubic-bezier(.22,1,.36,1) forwards;
}
.pb.base i{background:rgba(242,237,228,.14);}
.pb.opt i{background:var(--gold);}
.pb b{font-family:var(--mono);font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.pb.opt b{color:var(--gold);}
.perf-mult{
  font-family:var(--mono);font-size:21px;font-weight:800;text-align:right;
  color:var(--gold);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.perf-legend{
  display:flex;flex-wrap:wrap;align-items:center;gap:20px;
  margin-top:26px;padding-top:20px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}
.perf-legend span{display:inline-flex;align-items:center;gap:8px;}
.perf-legend .lg{width:14px;height:7px;border-radius:3px;}
.perf-legend .lg.base{background:rgba(242,237,228,.14);}
.perf-legend .lg.opt{background:var(--gold);}
.perf-legend em{margin-left:auto;font-style:normal;opacity:.7;}

.perf-cards{display:grid;grid-template-columns:1fr;gap:2px;}
.pcard{
  padding:22px 0;
  border-bottom:1px solid var(--line);
  display:flex;flex-direction:column;gap:5px;
}
.pcard:last-child{border-bottom:none;}
.pcard b{
  font-size:34px;font-weight:800;letter-spacing:-.035em;color:var(--gold);
  font-variant-numeric:tabular-nums;line-height:1.05;
}
.pcard span{font-size:12.5px;color:var(--text-3);}

/* ---------- 应用场景：12 项，编辑式三列 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px 34px;}
.scene{
  display:flex;flex-direction:column;
  padding:24px 0 26px;
  border-top:1px solid var(--line);
  transition:border-color .35s;
}
.scene:hover{border-top-color:var(--gold-line);}
.scene-head{display:flex;align-items:baseline;gap:11px;margin-bottom:10px;}
.scene-idx{
  flex-shrink:0;font-family:var(--mono);font-weight:700;font-size:12.5px;
  color:var(--gold);letter-spacing:.08em;
}
.scene h3{font-size:16.5px;font-weight:700;letter-spacing:-.01em;flex:1;}
.scene-scale{
  font-style:normal;font-family:var(--mono);font-size:11.5px;
  color:var(--text-3);white-space:nowrap;font-variant-numeric:tabular-nums;
}
.scene-scale i{font-style:normal;color:var(--gold);margin-left:7px;letter-spacing:.06em;}
.scene p{font-size:14px;color:var(--text-2);line-height:1.85;}

/* ---------- 动态 ---------- */
.news-list{display:flex;flex-direction:column;}
.news-item{
  display:grid;grid-template-columns:104px 1fr;gap:0 26px;align-items:start;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  transition:border-color .35s;
}
.news-item:first-child{border-top:1px solid var(--line);}
.news-item:hover{border-bottom-color:var(--gold-line);}
.news-item time{
  grid-column:1;font-family:var(--mono);font-size:12.5px;
  color:var(--text-3);letter-spacing:.04em;
}
.news-tag{
  grid-column:1;margin-top:7px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--gold);
}
.news-body{grid-column:2;grid-row:1 / span 2;}
.news-body h3{font-size:17.5px;margin-bottom:8px;font-weight:700;transition:color .2s;line-height:1.5;}
.news-item:hover .news-body h3{color:var(--gold);}
.news-body p{font-size:14px;color:var(--text-2);line-height:1.85;}

/* ---------- 合作模式 ---------- */
.coop-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px 34px;}
.coop{
  padding:30px 0 30px 26px;
  border-left:1px solid var(--line);
  transition:border-color .35s;
}
.coop.feature{border-left:2px solid var(--gold);}
.coop:hover{border-left-color:var(--gold-line);}
.coop.feature:hover{border-left-color:var(--gold);}
.coop h3{font-size:17.5px;margin-bottom:8px;font-weight:700;}
.coop-price{
  font-family:var(--mono);font-size:14px;color:var(--gold);margin-bottom:16px !important;
  font-weight:700;letter-spacing:.04em;
}
.coop p{font-size:14.5px;color:var(--text-2);line-height:1.9;}
.coop-note{
  display:inline-block;margin-top:20px;font-size:12px;color:var(--text-3);
  letter-spacing:.02em;
}

/* ---------- 表单 + 联系 ---------- */
.contact-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;margin-top:64px;}
.cform{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:40px 38px;
}
.cform h3{font-size:21px;margin-bottom:10px;font-weight:700;}
.cform-sub{font-size:14px;color:var(--text-3);margin-bottom:30px !important;line-height:1.8;}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.f-field{display:flex;flex-direction:column;gap:9px;margin-bottom:20px;}
.f-field label{font-size:13px;color:var(--text-2);font-weight:500;}
.f-field label i{color:var(--gold);font-style:normal;}
.f-field input,.f-field textarea{
  width:100%;padding:13px 15px;border-radius:var(--radius-sm);
  background:rgba(242,237,228,.035);border:1px solid var(--line);
  color:var(--text);font-family:inherit;font-size:14.5px;
  transition:border-color .2s,background .2s;resize:vertical;
}
.f-field input::placeholder,.f-field textarea::placeholder{color:#6B6459;}
.f-field input:focus,.f-field textarea:focus{
  outline:none;border-color:var(--gold-line);background:rgba(242,237,228,.055);
}
.f-field.err input,.f-field.err textarea{border-color:var(--cinnabar);}
.f-tip{margin-top:16px;font-size:13.5px;min-height:20px;}
.f-tip.ok{color:var(--gold);}
.f-tip.err{color:var(--cinnabar);}

.cinfo{padding-top:4px;}
.cinfo h3{font-size:21px;margin-bottom:26px;font-weight:700;}
.cinfo ul{display:flex;flex-direction:column;gap:0;margin-bottom:34px;}
.cinfo li{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:15px 0;border-bottom:1px solid var(--line);font-size:14px;
}
.cinfo li:first-child{border-top:1px solid var(--line);}
.cinfo li span{color:var(--text-3);font-size:13px;}
.cinfo li a,.cinfo li b{color:var(--text);font-size:14px;font-weight:600;}
.cinfo li a:hover{color:var(--gold);}
.cinfo-note{
  background:var(--gold-soft);border-left:2px solid var(--gold);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:20px 22px;
}
.cinfo-note strong{display:block;font-size:13.5px;color:var(--gold);margin-bottom:10px;letter-spacing:.02em;}
.cinfo-note p{font-size:13.5px;color:var(--text-2);line-height:1.85;}

/* ============================================================
   Footer
   ============================================================ */
.footer{background:var(--bg-2);border-top:1px solid var(--line);padding:76px 0 34px;}
.footer-inner{display:grid;grid-template-columns:1fr 1.3fr;gap:56px;padding-bottom:52px;}
.footer .logo-text{font-size:18px;}
.f-slogan{margin-top:18px;font-size:13.5px;color:var(--text-3);line-height:1.8;max-width:300px;}
.f-links{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.f-links h4{
  font-size:12px;margin-bottom:18px;color:var(--text-3);
  font-family:var(--mono);letter-spacing:.18em;text-transform:uppercase;font-weight:600;
}
.f-links a{display:block;font-size:13.5px;color:var(--text-2);padding:6px 0;transition:color .2s;}
.f-links a:hover{color:var(--gold);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:flex-start;
  padding-top:30px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-3);
}
.footer-bottom .disc{max-width:620px;line-height:1.8;opacity:.72;}

/* ============================================================
   动画
   ============================================================ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1);}
.reveal.in{opacity:1;transform:none;}

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

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:1fr;gap:56px;}
  .hero-visual{max-width:520px;}
  .hero-pillar{opacity:.06;height:56%;right:-4%;}
  .perf-wrap{grid-template-columns:1fr;gap:34px;}
  .perf-cards{grid-template-columns:repeat(2,1fr);gap:2px 34px;}
  .steps{grid-template-columns:repeat(2,1fr);gap:8px 30px;}
  .contact-wrap{grid-template-columns:1fr;gap:44px;}
}

@media (max-width:900px){
  :root{--nav-h:66px;}
  .nav-toggle{display:flex;}
  .nav-menu{
    position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:3px;
    background:rgba(23,22,20,.98);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);
    padding:18px 22px 26px;
    transform:translateY(-12px);opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .25s,transform .25s,visibility .25s;
    max-height:calc(100vh - var(--nav-h));overflow-y:auto;
  }
  .nav-menu.open{transform:none;opacity:1;visibility:visible;pointer-events:auto;}
  .nav-link{padding:14px 10px;font-size:16px;border-radius:10px;}
  .nav-link.active::after{display:none;}
  .nav-cta{margin:12px 0 0;justify-content:center;}
  .nav-menu .btn{width:100%;}

  .grid-3,.cap-grid,.coop-grid,.scene-grid{grid-template-columns:1fr 1fr;}
  .hw-wrap{grid-template-columns:1fr;gap:30px;}
  .section{padding:92px 0;}
  .hero{padding:calc(var(--nav-h) + 48px) 0 84px;min-height:auto;}
  .hero-visual{max-width:100%;}
  .news-item{grid-template-columns:1fr;gap:0;padding:26px 0;}
  .news-item time,.news-tag,.news-body{grid-column:1;grid-row:auto;}
  .news-tag{margin-top:6px;margin-bottom:6px;}
  .footer-inner{grid-template-columns:1fr;gap:38px;}
}

@media (max-width:640px){
  .container{padding:0 20px;}
  .grid-3,.grid-2,.cap-grid,.coop-grid,.scene-grid{grid-template-columns:1fr;}
  .perf-cards{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:22px 16px;}
  .hero-actions .btn{flex:1 1 100%;}
  .perf-row{grid-template-columns:1fr 68px;gap:10px 14px;padding:18px 0;}
  .perf-name{grid-column:1 / -1;}
  .perf{padding:26px 22px;}
  .cf-bar{grid-template-columns:64px 1fr 38px;}
  .f-row{grid-template-columns:1fr;}
  .cform{padding:30px 24px;}
  .section{padding:74px 0;}
  .sec-head{margin-bottom:44px;}
  .scroll-hint{display:none;}
  .hero-pillar{display:none;}
  .f-links{grid-template-columns:1fr 1fr;gap:22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}