/* =========================================================
   鹏权五金 · 官网样式（暗夜金 · 沉稳大气高端）
   深蓝图纸底 / 蓝图青强调 #C9A876 / 切角金属件 / 蓝图网格 /
   粗重字重 / 警示条纹 —— 保留 VEX 式布局骨架与全部
   动画引擎钩子（reveal/磁性/详情面板/表单/AI/字符入场）
   ========================================================= */

:root{
  /* 底色：枪黑 / 炭钢 / 铁灰 */
  --bg:#0A0A0A;
  --bg-2:#0E0E0E;
  --bg-3:#161616;
  /* 面：钢板卡片 */
  --surface:#0D0D0D;
  --surface-2:#141414;
  --surface-hi:#1A1A1A;
  /* 描边：钢系 hairline */
  --line:rgba(255,255,255,.13);
  --line-soft:rgba(255,255,255,.07);
  --line-gold:rgba(201,168,118,.30);
  --silver:rgba(163,168,178,.5);
  /* 文字：暖白标题 / 钢灰正文 */
  --ink:#C9C2B5;            /* 正文主色 */
  --slate:#F5F1EA;          /* 标题主色（暖白） */
  --slate-2:#E8E2D4;
  --muted:#8A8580;          /* 副文字 */
  --muted-2:#6E6962;        /* 更淡 */
  /* 强调：熔橙（--copper* 变量名保留，值为锻造熔橙） */
  --copper:#C9A876;
  --copper-soft:#E8C896;
  --copper-deep:#8B6F3F;
  --copper-grad:linear-gradient(135deg,#E8C896,#C9A876 55%,#8B6F3F);
  --steel:#7A756B;
  --ring:rgba(201,168,118,.32);
  --glow:rgba(201,168,118,.16);
  --glow-soft:rgba(201,168,118,.08);
  --radius:6px;             /* 机加工小圆角 */
  --radius-lg:10px;
  --maxw:1200px;
  /* 阴影：黑底深影 + 顶部微高光 */
  --glass-shadow:0 24px 55px -30px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.07);
  --glass-shadow-lg:0 44px 110px -40px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.07);
  --glass-shadow-soft:0 20px 46px -26px rgba(0,0,0,.85),inset 0 1px 0 rgba(255,255,255,.06);
  /* 物理缓动曲线 */
  --ease:cubic-bezier(0.16,1,0.3,1);
  --ease-soft:cubic-bezier(0.22,1,0.36,1);
  --ease-liquid:cubic-bezier(0.34,1.3,0.5,1);
  --spring:cubic-bezier(0.34,1.42,0.5,1);
  --font:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",-apple-system,system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  /* 变量名保留 --serif，值为无衬线栈（标题全部走 Inter 工业风） */
  --serif:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",-apple-system,system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body.modal-open,body.menu-open{overflow:hidden}

/* 固定工业底纹：蓝图青光 + 双层蓝图网格（细 56px / 粗 280px） */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:
  radial-gradient(52% 40% at 88% 4%,rgba(201,168,118,.09),transparent 60%),
  radial-gradient(46% 46% at 4% 96%,rgba(201,168,118,.06),transparent 62%),
  linear-gradient(rgba(201,168,118,.05) 1px,transparent 1px),
  linear-gradient(90deg,rgba(201,168,118,.05) 1px,transparent 1px),
  linear-gradient(rgba(201,168,118,.11) 1px,transparent 1px),
  linear-gradient(90deg,rgba(201,168,118,.11) 1px,transparent 1px));
  background-size:auto,auto,56px 56px,56px 56px,280px 280px,280px 280px}
/* 细腻噪点（金属哑光质感） */
body::after{
  content:"";position:fixed;inset:0;z-index:9990;pointer-events:none;opacity:.04;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")
}

a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
::selection{background:#C9A876;color:#0A0A0A}
.gpu{will-change:transform;transform:translateZ(0);backface-visibility:hidden}

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

/* ---------- 液态玻璃 v2（增强：厚玻璃折射 + 饱和提亮 + 流动光泽） ---------- */
.liquid-glass{
  position:relative;
  overflow:hidden;
  border:none;
  /* 主体：斜向高光渐变叠加半透明暗底，模拟厚玻璃内部的密度不均。
     底色不宜过实——越透明，背后内容的模糊与透色越明显，玻璃感越强。 */
  background:
    linear-gradient(135deg,
      rgba(255,255,255,.16) 0%,
      rgba(255,255,255,.04) 34%,
      rgba(255,255,255,.11) 58%,
      rgba(255,255,255,.03) 100%),
    rgba(8,9,11,.30);
  background-blend-mode:luminosity,normal;
  /* 折射核心：大半径模糊 + 高饱和 + 轻微提亮 */
  backdrop-filter:blur(26px) saturate(200%) brightness(1.12);
  -webkit-backdrop-filter:blur(26px) saturate(200%) brightness(1.12);
  /* 四层阴影：顶部高光棱 + 内发光 / 底部暗边 / 外部投影 —— 立体玻璃边缘 */
  box-shadow:
    inset 0 1px 2px rgba(255,255,255,.30),
    inset 0 0 22px rgba(255,255,255,.07),
    inset 0 -1px 1px rgba(0,0,0,.34),
    0 14px 40px -14px rgba(0,0,0,.80);
}
/* 折射边框：上下亮、中段隐没，模拟玻璃厚度的边缘反光 */
.liquid-glass::before{
  content:'';position:absolute;inset:0;border-radius:inherit;padding:1.8px;
  /* 上下强反光 + 中段隐没 + 轻微暖金色调（贴合品牌色），模拟玻璃厚度边缘 */
  background:linear-gradient(180deg,
    rgba(255,255,255,.55) 0%,rgba(232,200,150,.30) 14%,
    rgba(255,255,255,.06) 40%,rgba(255,255,255,.04) 60%,
    rgba(232,200,150,.26) 86%,rgba(255,255,255,.48) 100%);
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
  z-index:2;
}
/* 流动光泽：一道倾斜高光缓慢扫过表面（GPU 合成，仅 left/opacity 动画）。
   峰值更亮、周期更短、可见占比更高，让"流动"真正被看见。 */
.liquid-glass::after{
  content:'';
  position:absolute;
  top:-15%;left:-70%;
  width:48%;height:130%;
  background:linear-gradient(100deg,
    transparent 0%,
    rgba(255,255,255,.14) 38%,
    rgba(255,255,255,.42) 50%,
    rgba(255,255,255,.14) 62%,
    transparent 100%);
  transform:skewX(-20deg);
  animation:glass-sheen 5.5s ease-in-out infinite;
  pointer-events:none;
  z-index:1;
  will-change:left,opacity;
}
@keyframes glass-sheen{
  0%, 42%  { left:-70%; opacity:0; }
  50%      { opacity:1; }
  82%      { left:130%; opacity:1; }
  92%,100% { left:130%; opacity:0; }
}
/* 尊重系统「减少动效」偏好：关闭流动光泽 */
@media (prefers-reduced-motion: reduce){
  .liquid-glass::after{animation:none;opacity:0}
}

/* 大标题体系（Inter 粗重工业字 · 熔橙点缀） */
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:3px;text-transform:uppercase;
  color:var(--copper);font-weight:700;margin-bottom:18px;
}
.eyebrow::before{content:"//";color:var(--copper);font-weight:700;letter-spacing:0}
h2.section-title{
  font-family:var(--serif);
  font-size:clamp(30px,4vw,46px);font-weight:700;letter-spacing:-.02em;
  line-height:1.16;margin-bottom:18px;color:var(--slate);
}
.section-title .hl{color:transparent;background:linear-gradient(120deg,#E8C896,#C9A876 60%,#8B6F3F);-webkit-background-clip:text;background-clip:text}
.section-title{position:relative}
/* 警示条纹下划线 */
.section-title::after{content:"";display:block;width:72px;height:5px;margin-top:18px;background:repeating-linear-gradient(-45deg,var(--copper) 0 7px,rgba(201,168,118,.18) 7px 14px);transform:scaleX(.35);transform-origin:left;transition:transform .9s var(--ease-soft) .25s}
.section-title.reveal.in::after{transform:scaleX(1)}
.lead{color:var(--muted);max-width:62ch;font-size:16.5px;line-height:1.8}

/* ---------- Buttons（切角金属件 · 熔橙主按钮） ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;font-weight:600;font-size:15px;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;position:relative;overflow:hidden;
  border-radius:2px;
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
  transition:transform .45s var(--ease-liquid),background .35s,border-color .35s,color .35s,filter .35s;
  will-change:transform;
}
.btn-primary{background:var(--copper-grad);color:#050505;filter:drop-shadow(0 10px 22px rgba(201,168,118,.22))}
.btn-primary::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);transform:translateX(-130%);transition:transform .75s var(--ease-soft);pointer-events:none}
.btn-primary:hover{filter:drop-shadow(0 16px 34px rgba(201,168,118,.32));transform:translateY(-2px)}
.btn-primary:hover::before{transform:translateX(130%)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:rgba(255,255,255,.2);color:#F5F1EA}
.btn-ghost:hover{background:var(--copper);color:#050505;border-color:var(--copper);transform:translateY(-2px)}
.btn .arrow{transition:transform .35s var(--ease)}
.btn:hover .arrow{transform:translateX(6px)}
.ripple{position:absolute;border-radius:50%;background:rgba(255,255,255,.35);transform:translate(-50%,-50%) scale(0);pointer-events:none;animation:ripple .7s var(--ease-soft) forwards}

/* ---------- Scroll progress（熔橙流） ---------- */
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:60;transform:scaleX(0);transform-origin:left;pointer-events:none}
.scroll-progress i{display:block;height:100%;width:100%;background:linear-gradient(90deg,#8B6F3F 0%,#C9A876 55%,#E8C896 100%)}

/* ---------- Header（VEX 式：页边距内液态玻璃条 · 工业暗化） ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;padding:24px 24px 0}
.nav-bar{
  max-width:1400px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:8px 16px;border-radius:4px;
  transition:background .35s var(--ease),box-shadow .35s var(--ease);
}
/* 滚动后：玻璃「加厚」——模糊半径与饱和度提升，底色更实，保证文字始终可读 */
.site-header.scrolled .nav-bar{
  background:
    linear-gradient(135deg,rgba(255,255,255,.09) 0%,rgba(255,255,255,.02) 100%),
    rgba(8,9,11,.72);
  backdrop-filter:blur(30px) saturate(200%) brightness(1.12);
  -webkit-backdrop-filter:blur(30px) saturate(200%) brightness(1.12);
  box-shadow:
    inset 0 1px 1px rgba(255,255,255,.22),
    inset 0 -1px 1px rgba(0,0,0,.30),
    0 14px 40px -16px rgba(0,0,0,.85);
}
.brand{display:flex;align-items:center;gap:10px;flex:none;user-select:none}
.brand-name{font-size:23px;font-weight:700;letter-spacing:-.01em;color:var(--slate);white-space:nowrap;line-height:1.2}
.brand-name sup{font-size:.5em;font-weight:400;margin-left:2px;color:var(--copper)}
.nav-links{display:flex;align-items:center;gap:32px;font-size:14px;font-weight:500;color:#C9C2B5}
.nav-links a{padding:4px 1px;transition:color .25s var(--ease);white-space:nowrap}
.nav-links a:hover{color:var(--copper-soft)}
.nav-links a.active{color:var(--copper);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:2px}
.nav-right{display:flex;align-items:center;gap:16px;flex:none}
.nav-cta{
  display:inline-flex;align-items:center;background:var(--copper-grad);color:#050505;
  padding:8px 22px;font-size:14px;font-weight:700;white-space:nowrap;letter-spacing:.3px;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
  transition:transform .25s var(--ease),filter .25s var(--ease);
}
.nav-cta:hover{transform:translateY(-1px);filter:drop-shadow(0 8px 18px rgba(201,168,118,.35))}
.lang-switch{display:inline-flex;align-items:center;gap:7px;flex:none}
.lang-ico{width:15px;height:15px;color:var(--muted);flex:none}
.lang-select{
  font:inherit;font-size:12.5px;font-weight:500;line-height:1;color:var(--slate-2);
  appearance:none;-webkit-appearance:none;cursor:pointer;min-width:92px;
  padding:7px 28px 7px 12px;border-radius:2px;
  border:1px solid rgba(255,255,255,.16);background-color:rgba(255,255,255,.04);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%239BA1AB' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 10px center;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.lang-select:hover{border-color:rgba(201,168,118,.5);background-color:rgba(201,168,118,.06)}
.lang-select:focus-visible{outline:2px solid rgba(201,168,118,.6);outline-offset:2px}
.lang-select option{color:#111;background:#fff}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:22px;height:2px;background:var(--slate);transition:transform .3s var(--ease-soft),opacity .3s var(--ease-soft)}
.burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 移动端全屏菜单（枪黑模糊覆盖层） ---------- */
.mnav{position:fixed;inset:0;z-index:48;background:rgba(8,9,11,.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .35s var(--ease-soft)}
.mnav.open{opacity:1;pointer-events:auto}
.mnav-links{display:flex;flex-direction:column;align-items:center;gap:6px}
.mnav-links a{font-size:30px;font-weight:600;letter-spacing:-.01em;color:var(--slate);padding:9px 18px;opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .45s var(--ease-soft),color .25s}
.mnav-links a:nth-child(1){transition-delay:.05s}.mnav-links a:nth-child(2){transition-delay:.1s}.mnav-links a:nth-child(3){transition-delay:.15s}.mnav-links a:nth-child(4){transition-delay:.2s}.mnav-links a:nth-child(5){transition-delay:.25s}.mnav-links a:nth-child(6){transition-delay:.3s}
.mnav.open .mnav-links a{opacity:1;transform:none}
.mnav-links a:hover{color:var(--copper-soft)}
.mnav-links a.mnav-cta{color:var(--copper);text-decoration:underline;text-underline-offset:6px}

/* ---------- Hero（全屏原画视频 · 底部双栏 · 字符级入场） ---------- */
.hero{position:relative;min-height:100dvh;display:flex;flex-direction:column;overflow:hidden;isolation:isolate;background:#000}
.hero-media{position:absolute;inset:0;z-index:0;overflow:hidden;
  /* 首屏底图：用 1280px 的正常分辨率 WebP 兜底。
     原因：video 设为 preload="none" 且尚未注入 src 时，
     多数浏览器不会渲染 poster 属性，会直接露出 .hero 的 #000 黑底，
     表现为「首屏全黑」。这里用真实图片兜底，视频加载后自然覆盖。
     注意：绝不可用极低分辨率图铺底（会放大成马赛克）。 */
  background-image:url("../images/hero-poster.webp");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  background-color:#0b0c0e;
}
.hero-media video{width:100%;height:100%;object-fit:cover;display:block}
/* 视频原画播放，无压暗遮罩；仅底部留一条钢线分界 */
.hero-bottom{
  position:relative;z-index:2;flex:1;display:flex;flex-direction:column;justify-content:flex-end;
  width:100%;max-width:1400px;margin:0 auto;
  padding:120px 24px 48px;
}
.hero-grid{display:grid;gap:36px}
.hero-eyebrow{font-size:13px;letter-spacing:3px;font-weight:700;color:var(--copper);margin-bottom:18px;text-transform:uppercase}
.hero-eyebrow::before{content:"// "}
.hero-title{
  font-family:var(--font);font-weight:600;
  font-size:clamp(36px,5.5vw,72px);
  letter-spacing:-.03em;line-height:1.08;color:var(--slate);
  margin-bottom:16px;user-select:none;
  text-shadow:0 2px 30px rgba(0,0,0,.5);
}
/* 字符级入场：每字 inline-block，自 opacity 0 + translateX(-18px) 归位（延迟由 hero.js 内联） */
.hero-title .line{display:block}
.hero-title .ch{
  display:inline-block;opacity:0;transform:translateX(-18px);
  transition:opacity .5s ease,transform .5s ease;
  will-change:opacity,transform;
}
.hero-title.play .ch{opacity:1;transform:translateX(0)}
.hero-sub{
  font-size:clamp(15px,1.4vw,18px);color:#C9C2B5;line-height:1.8;
  max-width:56ch;margin-bottom:20px;
  text-shadow:0 1px 16px rgba(0,0,0,.55);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px}
.btn-light{
  display:inline-flex;align-items:center;background:var(--copper-grad);color:#050505;
  padding:13px 32px;font-size:15px;font-weight:700;letter-spacing:.3px;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform .3s var(--ease),filter .3s var(--ease);
  filter:drop-shadow(0 10px 24px rgba(201,168,118,.25));
}
.btn-light:hover{transform:translateY(-2px);filter:drop-shadow(0 16px 36px rgba(201,168,118,.4))}
.btn-glass{
  display:inline-flex;align-items:center;color:var(--slate);
  padding:13px 32px;font-size:15px;font-weight:600;letter-spacing:.3px;
  border:1px solid rgba(255,255,255,.22);border-radius:2px;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s,transform .3s var(--ease);
}
.btn-glass:hover{background:rgba(201,168,118,.14);border-color:var(--copper);color:#E8C896;transform:translateY(-2px)}
.hero-side{display:flex;align-items:flex-end;justify-content:flex-start}
.hero-tag{
  display:inline-block;padding:12px 24px;border-radius:2px;
  border:1px solid rgba(201,168,118,.3);
  font-size:clamp(16px,1.7vw,22px);font-weight:500;letter-spacing:.06em;color:var(--slate);white-space:nowrap;
}
/* 渐现元件（副文 800ms / 按钮 1200ms / 标签卡 1400ms，时长 1000ms） */
.pq-fade{opacity:0;transition:opacity 1s ease}
.pq-fade.on{opacity:1}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(42px) scale(.985);will-change:transform,opacity;transition:opacity .9s var(--ease-soft),transform .9s var(--ease-soft)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}
/* 注意：clip-path 不能裁到零面积，否则 Chromium 系 IntersectionObserver
   判定元素与视口零相交，滚动揭示永不触发（图片区永久空白）——初始保留 22% 相交面积 */
.reveal-img{opacity:0;clip-path:inset(0 0 78% 0);will-change:transform,opacity;transition:clip-path 1.15s var(--ease-soft),opacity 1s var(--ease-soft)}
.reveal-img.in{opacity:1;clip-path:inset(0 0 0 0)}

/* ---------- Marquee ---------- */
.marquee{border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);background:var(--bg-2);overflow:hidden;padding:18px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee-track{display:flex;gap:48px;white-space:nowrap;animation:scroll-left 30s linear infinite;width:max-content}
.marquee-track span{font-size:15px;letter-spacing:2px;color:var(--muted);display:inline-flex;align-items:center;gap:12px}
.marquee-track span::before{content:"";width:7px;height:7px;background:var(--copper);border-radius:1px;transform:rotate(45deg)}
.marquee:hover .marquee-track{animation-play-state:paused}

/* ---------- Stats band ---------- */
.stats-band{padding:90px 0;background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{padding:34px 26px;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);position:relative;overflow:hidden;contain:layout;box-shadow:0 10px 30px -22px rgba(0,0,0,.8);transition:transform .5s var(--ease),border-color .5s,box-shadow .5s var(--ease)}
.stat:hover{transform:translateY(-6px);border-color:rgba(201,168,118,.4);box-shadow:var(--glass-shadow)}
.stat::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:repeating-linear-gradient(-45deg,var(--copper) 0 7px,rgba(201,168,118,.15) 7px 14px);transform:scaleX(.4);transform-origin:left;transition:transform .6s var(--ease)}
.stat.in::before{transform:scaleX(1)}
.stat .num{font-family:var(--font);font-size:clamp(34px,4vw,52px);font-weight:800;letter-spacing:-.03em;line-height:1;background:linear-gradient(180deg,#F5E6C8,#C9A876 62%,#6B5429);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.stat .num .suffix{font-size:.5em;color:var(--muted);margin-left:4px;font-family:var(--font);filter:none}
.stat .label{margin-top:10px;color:var(--muted);font-size:14.5px}

/* ---------- Sections ---------- */
section.block{padding:120px 0;content-visibility:auto;contain-intrinsic-size:auto 820px;position:relative}
section.block + section.block::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--line-soft) 18%,rgba(255,255,255,.12) 50%,var(--line-soft) 82%,transparent)}
.section-head{margin-bottom:64px;max-width:760px}

/* About */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.about-copy p{color:var(--muted);margin-bottom:18px;font-size:16px;line-height:1.8}
.about-copy strong{color:var(--slate);font-weight:600}
.about-facts{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
.fact{border:1px solid var(--line-soft);border-radius:var(--radius);padding:16px 18px;background:var(--surface);will-change:transform;transition:transform .4s var(--ease),border-color .4s,box-shadow .4s}
.fact:hover{transform:translateY(-4px);border-color:rgba(201,168,118,.35);box-shadow:var(--glass-shadow-soft)}
.fact .k{font-size:12px;letter-spacing:1.5px;color:var(--muted-2);text-transform:uppercase}
.fact .v{font-size:16px;font-weight:600;margin-top:6px;color:var(--slate)}
.about-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);min-height:400px;background:var(--bg-3);box-shadow:var(--glass-shadow)}
.about-visual .pv{position:absolute;left:0;right:0;top:-18%;bottom:-18%;background:url("../images/workshop.png") center / cover no-repeat;background-image:image-set(url("../images/workshop.webp") type("image/webp"),url("../images/workshop.png") type("image/png"));will-change:transform;transform:translate3d(0,var(--py,0px),0) scale(1.06);z-index:0}
.about-visual::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,transparent 52%,rgba(0,0,0,.6))}
.about-visual::after{content:"";position:absolute;inset:0;z-index:1;background:radial-gradient(circle at 50% 40%,rgba(201,168,118,.1),transparent 60%);opacity:0;transition:opacity .6s}
.about-visual:hover::after{opacity:1}
.about-visual .vcap{position:absolute;left:22px;bottom:20px;z-index:2;color:#fff;font-weight:600;font-size:14.5px;letter-spacing:.5px;text-shadow:0 2px 12px rgba(0,0,0,.55);display:flex;align-items:center;gap:9px}
.about-visual .vcap::before{content:"";width:9px;height:9px;border-radius:1px;background:var(--copper);transform:rotate(45deg)}
.spin-slow{animation:spin 26s linear infinite;transform-origin:center}
.float-y{animation:floaty 6s ease-in-out infinite}

/* ---------- Products ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pcard{position:relative;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);padding:28px 24px;overflow:hidden;contain:layout;will-change:transform;box-shadow:0 10px 28px -24px rgba(0,0,0,.8);transition:transform .5s var(--ease),border-color .5s,box-shadow .5s,opacity .5s var(--ease)}
.pcard::before{content:"";position:absolute;inset:0;border-radius:var(--radius);padding:1px;background:linear-gradient(135deg,rgba(201,168,118,.55),transparent 55%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .5s;pointer-events:none}
.pcard:hover{transform:translateY(-10px);border-color:rgba(201,168,118,.4);box-shadow:var(--glass-shadow)}
.pcard:hover::before{opacity:1}
.pcard .ico{width:84px;height:84px;margin-bottom:20px;transition:transform .5s var(--ease)}
.pcard:hover .ico{transform:translateY(-4px) scale(1.06)}
.pcard h3{font-size:19px;font-weight:700;margin-bottom:10px;color:var(--slate)}
.pcard p{color:var(--muted);font-size:14.5px;line-height:1.8}
.pcard .tag{position:absolute;top:18px;right:18px;font-size:11px;letter-spacing:1.5px;color:var(--copper);border:1px solid rgba(201,168,118,.3);padding:4px 10px;border-radius:2px;background:rgba(201,168,118,.07)}
@media (hover:hover){
.cards:has(.pcard:hover) .pcard:not(:hover){opacity:.55;transform:scale(.972)}
.steps:has(.step:hover) .step:not(:hover){opacity:.55;transform:scale(.985)}
.bento:has(.cell:hover) .cell:not(:hover){opacity:.55;transform:scale(.972)}
}

/* ---------- Process ---------- */
.process{background:var(--bg-2);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:step;position:relative}
.steps .rail{position:absolute;top:30px;left:9%;right:9%;height:2px;background:linear-gradient(90deg,transparent,var(--copper),transparent);transform:scaleX(0);transform-origin:left;transition:transform 1.3s var(--ease)}
.steps.drawn .rail{transform:scaleX(1)}
.step{padding:34px 22px;position:relative;border-right:1px solid var(--line-soft);contain:layout;will-change:transform;transition:transform .45s var(--ease),opacity .45s var(--ease),box-shadow .45s var(--ease)}
.step:last-child{border-right:0}
.step:hover{transform:translateY(-6px);box-shadow:var(--glass-shadow)}
.step .n{counter-increment:step;font-size:13px;color:var(--copper);letter-spacing:2px;font-weight:700;position:relative;z-index:2}
.step .n::before{content:"0" counter(step)}
.step .ic{width:46px;height:46px;margin:16px 0;color:var(--copper);transition:transform .5s var(--ease)}
.step:hover .ic{transform:scale(1.12) rotate(-4deg)}
.step h4{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--slate)}
.step p{color:var(--muted);font-size:14px;line-height:1.8}
.step::after{content:"";position:absolute;left:22px;bottom:0;width:0;height:3px;background:var(--copper);transition:width .5s var(--ease)}
.step:hover::after{width:calc(100% - 44px)}

/* ---------- Advantages (bento) ---------- */
.bento{display:grid;grid-template-columns:repeat(6,1fr);grid-auto-rows:200px;gap:18px}
.cell{border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);padding:28px;position:relative;overflow:hidden;contain:layout;will-change:transform;box-shadow:0 10px 28px -24px rgba(0,0,0,.8);transition:transform .5s var(--ease),border-color .5s,opacity .5s var(--ease),box-shadow .5s var(--ease)}
.cell:hover{transform:translateY(-6px);border-color:rgba(201,168,118,.4);box-shadow:var(--glass-shadow)}
.cell h3{font-size:20px;font-weight:700;margin-bottom:10px;color:var(--slate)}
.cell p{color:var(--muted);font-size:14.5px;line-height:1.8}
.cell .big{font-family:var(--font);font-size:clamp(40px,5vw,60px);font-weight:800;color:var(--copper);letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.cell .ic{width:44px;height:44px;color:var(--copper);margin-bottom:16px;transition:transform .5s var(--ease)}
.cell:hover .ic{transform:translateY(-4px) scale(1.06)}
.c-wide{grid-column:span 3}.c-mid{grid-column:span 3}.c-sm{grid-column:span 2}
.cell.hero-cell{background:linear-gradient(135deg,#0A0A0A,#0B0B0B);border-color:rgba(201,168,118,.3);color:var(--slate)}
.cell.hero-cell h3{color:var(--slate)}
.cell.hero-cell p{color:var(--ink)}
.cell.hero-cell .glow{position:absolute;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(201,168,118,.14),transparent 70%);top:-80px;right:-60px;filter:blur(10px);animation:pulse-glow 5s ease-in-out infinite}

/* ---------- Clickable (interrupt-open affordance) ---------- */
.clickable{cursor:pointer;outline:none;touch-action:manipulation}
.btn,.nav-links a,.burger{cursor:pointer;touch-action:manipulation}
.clickable.pressed{box-shadow:0 0 0 2px rgba(201,168,118,.45),0 18px 44px -22px rgba(0,0,0,.9);border-color:rgba(201,168,118,.5)}
.clickable:focus-visible{box-shadow:0 0 0 3px rgba(201,168,118,.45),0 0 0 6px rgba(201,168,118,.14)}
.peek{position:absolute;right:18px;bottom:18px;display:inline-flex;align-items:center;gap:6px;font-size:12.5px;letter-spacing:1px;color:var(--copper);background:rgba(201,168,118,.08);border:1px solid rgba(201,168,118,.3);padding:6px 12px;border-radius:2px;opacity:0;transform:translateY(10px);transition:opacity .4s var(--ease),transform .4s var(--ease);pointer-events:none}
.clickable:hover .peek{opacity:1;transform:none}
.peek svg{width:14px;height:14px;transition:transform .4s var(--ease)}
.clickable:hover .peek svg{transform:translateX(4px)}

/* ---------- Modal / 打断式详情面板 ---------- */
.modal{position:fixed;inset:0;z-index:100;display:none}
.modal.open,.modal.closing{display:block}
.modal-surface{position:absolute;inset:0;clip-path:circle(0% at var(--ox,50%) var(--oy,50%));transition:clip-path .72s cubic-bezier(.76,0,.24,1);will-change:clip-path}
.modal.shown .modal-surface{clip-path:circle(150% at var(--ox,50%) var(--oy,50%))}
.modal-scrim{position:absolute;inset:0;background:rgba(0,0,0,.6);opacity:0;transition:opacity .6s var(--ease)}
.modal-scrim::before{content:"";position:absolute;inset:0;opacity:0;transition:opacity .6s var(--ease);backdrop-filter:blur(28px) saturate(1.2);-webkit-backdrop-filter:blur(28px) saturate(1.2)}
.modal.shown .modal-scrim{opacity:1}
.modal.shown .modal-scrim::before{opacity:1}
.modal.closing .modal-scrim{opacity:0;transition:opacity .3s var(--ease)}
.modal.closing .modal-scrim::before{opacity:0;transition:opacity .3s var(--ease)}
.modal-card{position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;background:#080808;border-left:1px solid rgba(255,255,255,.12);box-shadow:var(--glass-shadow-lg);-webkit-overflow-scrolling:touch;touch-action:pan-y}
.modal-card::-webkit-scrollbar{width:10px}
.modal-card::-webkit-scrollbar-thumb{background:rgba(201,168,118,.35);border-radius:10px;border:3px solid transparent;background-clip:content-box}
.modal-card::-webkit-scrollbar-thumb:hover{background:rgba(201,168,118,.55);background-clip:content-box}
.modal-card::-webkit-scrollbar-track{background:transparent}
.modal-inner{max-width:980px;margin:0 auto;padding:clamp(48px,9vh,110px) 28px clamp(60px,8vh,90px);opacity:0;transform:translateY(36px) scale(.94);transition:opacity .55s var(--ease) .2s,transform .65s var(--ease-soft) .2s}
.modal.shown .modal-inner{opacity:1;transform:none}
.m-mark{width:64px;height:64px;margin-bottom:22px;opacity:0;transform:translateY(14px) scale(.92);transition:opacity .55s var(--ease) .22s,transform .6s var(--ease-soft) .22s}
.modal.shown .m-mark{opacity:1;transform:none;animation:mark-float 6s ease-in-out 1s infinite}
@keyframes mark-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.modal-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--copper);font-weight:700;margin-bottom:18px;opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease) .28s,transform .5s var(--ease) .28s}
.modal-eyebrow::before{content:"//";font-weight:700}
.modal.shown .modal-eyebrow{opacity:1;transform:none}
.modal-title{font-family:var(--serif);font-size:clamp(32px,5.6vw,56px);font-weight:700;letter-spacing:-.02em;line-height:1.16;margin-bottom:18px;color:var(--slate);opacity:0;transform:translateY(18px) scale(.96);transition:opacity .55s var(--ease) .34s,transform .6s var(--ease-soft) .34s}
.modal.shown .modal-title{opacity:1;transform:none}
.modal-desc{color:var(--muted);font-size:18px;max-width:64ch;margin-bottom:40px;line-height:1.8;opacity:0;transform:translateY(18px);transition:opacity .55s var(--ease) .4s,transform .6s var(--ease-soft) .4s}
.modal.shown .modal-desc{opacity:1;transform:none}
.m-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;opacity:0;transform:translateY(20px);transition:opacity .55s var(--ease) .46s,transform .6s var(--ease-soft) .46s}
.modal.shown .m-grid{opacity:1;transform:none}
.m-feats h4,.m-specs h4{font-size:14px;letter-spacing:2px;text-transform:uppercase;color:var(--copper);margin-bottom:18px}
.m-feats ul{list-style:none;display:flex;flex-direction:column;gap:14px}
.m-feats li{position:relative;padding-left:30px;color:var(--ink);font-size:16px;line-height:1.6;opacity:0;transform:translateX(-14px);transition:opacity .5s var(--ease),transform .5s var(--ease-soft)}
.modal.shown .m-feats li{opacity:1;transform:none}
.modal.shown .m-feats li:nth-child(1){transition-delay:.5s}
.modal.shown .m-feats li:nth-child(2){transition-delay:.56s}
.modal.shown .m-feats li:nth-child(3){transition-delay:.62s}
.modal.shown .m-feats li:nth-child(4){transition-delay:.68s}
.m-feats li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:2px;background:var(--copper-grad);transform:rotate(45deg)}
.m-specs dl{display:grid;grid-template-columns:auto 1fr;gap:0;border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden;background:var(--surface-2)}
.m-specs .row{display:contents}
.m-specs dt{padding:14px 18px;border-bottom:1px solid var(--line-soft);color:var(--muted-2);font-size:14px;letter-spacing:.5px}
.m-specs dd{padding:14px 18px;border-bottom:1px solid var(--line-soft);color:var(--slate);font-size:14.5px;font-weight:600;text-align:right}
.m-specs .row:last-child dt,.m-specs .row:last-child dd{border-bottom:0}
.modal-close{position:fixed;top:22px;right:26px;width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:rgba(8,9,11,.65);backdrop-filter:blur(10px);color:var(--slate);display:grid;place-items:center;cursor:pointer;z-index:2;opacity:0;box-shadow:0 10px 26px -14px rgba(0,0,0,.85);transition:transform .35s var(--ease),border-color .35s,background .35s,opacity .4s var(--ease) .3s}
.modal.shown .modal-close{opacity:1}
.modal-close:hover{transform:rotate(90deg);border-color:var(--copper);background:rgba(201,168,118,.12)}
.modal-close svg{width:22px;height:22px}
.modal.closing .modal-inner,.modal.closing .modal-eyebrow,.modal.closing .modal-title,.modal.closing .modal-desc,.modal.closing .m-grid,.modal.closing .m-feats li{opacity:0;transform:translateY(12px);transition:opacity .25s var(--ease),transform .25s var(--ease)}
.modal.closing .modal-close{opacity:0;transition:opacity .25s var(--ease)}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.form{display:flex;flex-direction:column;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:13.5px;color:var(--muted);letter-spacing:.5px;font-weight:600}
.field input,.field textarea{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;color:var(--slate);font-family:inherit;font-size:15px;transition:border-color .25s,box-shadow .25s}
.field input::placeholder,.field textarea::placeholder{color:var(--muted-2)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--copper);box-shadow:0 0 0 3px rgba(201,168,118,.14)}
.field.error input,.field.error textarea{border-color:#D9534F}
.field .err{font-size:12.5px;color:#E4716C;height:0;opacity:0;transition:.25s}
.field.error .err{height:auto;opacity:1}
.form .btn-primary{justify-content:center;margin-top:6px}
.form .ok{display:flex;align-items:center;gap:10px;padding:0 16px;max-height:0;opacity:0;overflow:hidden;border-radius:var(--radius);background:rgba(46,140,74,.14);border:1px solid transparent;color:#5CC47F;font-size:14.5px;transition:max-height .5s var(--ease),opacity .4s var(--ease),padding .5s var(--ease),border-color .5s var(--ease),margin .45s var(--ease)}
.form.sent .ok{max-height:64px;opacity:1;padding:14px 16px;border-color:rgba(46,140,74,.4);margin-top:4px}
.form .fail{display:flex;align-items:center;gap:10px;padding:0 16px;max-height:0;opacity:0;overflow:hidden;border-radius:var(--radius);background:rgba(217,83,79,.12);border:1px solid transparent;color:#E4716C;font-size:14.5px;transition:max-height .5s var(--ease),opacity .4s var(--ease),padding .5s var(--ease),border-color .5s var(--ease),margin .45s var(--ease)}
.form.send-error .fail{max-height:64px;opacity:1;padding:14px 16px;border-color:rgba(217,83,79,.4);margin-top:4px}
.form .btn-primary.sending{opacity:.7;cursor:wait}
.form .btn-primary.send-error{background:linear-gradient(135deg,#D9534F,#B03A35);color:#fff}
.form .btn-primary{transition:transform .4s var(--ease),filter .4s var(--ease),background .4s,border-color .4s,color .4s}
.form .btn-primary.sent{background:linear-gradient(135deg,#43b56a,#2e8c4a);color:#fff;filter:drop-shadow(0 10px 26px rgba(46,140,74,.4))}
.contact-info .ci{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line-soft);transition:transform .4s var(--ease)}
.contact-info .ci:hover{transform:translateX(6px)}
.contact-info .ci:last-child{border-bottom:0}
.contact-info .ci .ic{width:40px;height:40px;flex:none;color:var(--copper)}
.contact-info .ci .k{font-size:12.5px;color:var(--muted-2);letter-spacing:1px;text-transform:uppercase}
.contact-info .ci .v{font-size:16px;font-weight:600;margin-top:3px;color:var(--slate)}
.contact-info .ci .v a{color:var(--copper);text-decoration:none;border-bottom:1px solid rgba(201,168,118,.35);transition:color .3s var(--ease),border-color .3s var(--ease)}
.contact-info .ci .v a:hover{color:#E8C896;border-color:#E8C896}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-2);color:var(--ink);border-top:1px solid var(--line-soft);padding:60px 0 30px;content-visibility:auto;contain-intrinsic-size:auto 520px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:40px}
.site-footer .name{font-family:var(--font);font-size:20px;font-weight:700;margin:14px 0 10px;color:var(--slate)}
.site-footer p{color:var(--muted);font-size:14.5px;max-width:42ch;line-height:1.8}
.foot-col h5{font-size:13px;letter-spacing:2px;color:var(--muted-2);text-transform:uppercase;margin-bottom:16px}
.foot-col a{display:block;color:var(--muted);padding:7px 0;transition:color .25s,transform .25s}
.foot-col a:hover{color:var(--copper-soft);transform:translateX(4px)}
.foot-bottom{border-top:1px solid var(--line-soft);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted-2);font-size:13px}

/* ---------- Back to top ---------- */
.to-top{position:fixed;right:24px;bottom:92px;width:50px;height:50px;border-radius:50%;border:1px solid var(--line);background:rgba(8,9,11,.65);backdrop-filter:blur(10px);color:var(--slate);display:grid;place-items:center;cursor:pointer;opacity:0;transform:translateY(20px) scale(.8);pointer-events:none;transition:.45s var(--ease);z-index:45;box-shadow:0 12px 30px -16px rgba(0,0,0,.85)}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--copper);box-shadow:0 0 0 5px rgba(201,168,118,.12);transform:translateY(-3px)}
.to-top svg{width:20px;height:20px}

/* =========================================================
   信任背书 / 品牌故事 / 转化增强（暗黑重工业 · 熔橙）
   ========================================================= */
.trust{background:var(--bg-3);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:56px}
.cert{display:flex;align-items:center;gap:16px;padding:22px 22px;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);transition:transform .5s var(--ease),border-color .5s,box-shadow .5s var(--ease)}
.cert:hover{transform:translateY(-6px);border-color:rgba(201,168,118,.35);box-shadow:var(--glass-shadow)}
.cert .badge{width:52px;height:52px;flex:none;border-radius:var(--radius);display:grid;place-items:center;background:linear-gradient(135deg,rgba(201,168,118,.14),rgba(201,168,118,.04));color:var(--copper);border:1px solid rgba(201,168,118,.28)}
.cert .badge svg{width:28px;height:28px}
.cert .ct{font-size:16px;font-weight:700;color:var(--slate)}
.cert .cd{font-size:12.5px;color:var(--muted-2);margin-top:3px}

.trust-cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:54px}
.tcase{padding:28px 26px;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);position:relative;overflow:hidden;transition:transform .5s var(--ease),box-shadow .5s var(--ease),border-color .5s}
.tcase:hover{transform:translateY(-6px);box-shadow:var(--glass-shadow);border-color:rgba(201,168,118,.32)}
.tcase .tind{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--copper);font-weight:700;margin-bottom:14px}
.tcase .tbig{font-family:var(--font);font-size:38px;font-weight:800;color:var(--slate);line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.tcase .tbig .suffix{font-size:.5em;color:var(--muted);margin-left:4px;font-family:var(--font);filter:none}
.tcase p{color:var(--muted);font-size:14px;margin-top:12px;line-height:1.8}

.logo-wall-title{text-align:center;color:var(--muted-2);font-size:13px;letter-spacing:3px;text-transform:uppercase;margin-bottom:26px}
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.lw{height:74px;border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);display:grid;place-items:center;color:var(--slate);font-weight:600;font-size:15px;letter-spacing:.5px;filter:grayscale(1);opacity:.72;transition:filter .4s var(--ease),opacity .4s var(--ease),transform .4s var(--ease),border-color .4s,box-shadow .4s}
.lw:hover{filter:none;opacity:1;transform:translateY(-4px);border-color:rgba(201,168,118,.32);box-shadow:var(--glass-shadow)}

/* ---------- 品牌故事 Story ---------- */
.story{background:var(--bg-2)}
.story-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:56px;align-items:center}
.story-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);min-height:460px;background:var(--bg-3);box-shadow:var(--glass-shadow)}
.story-visual .pv{position:absolute;left:0;right:0;top:-18%;bottom:-18%;background:url("../images/diaolou.png") center / cover no-repeat;background-image:image-set(url("../images/diaolou.webp") type("image/webp"),url("../images/diaolou.png") type("image/png"));will-change:transform;transform:translate3d(0,var(--py,0px),0) scale(1.06);z-index:0}
.story-visual::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,transparent 48%,rgba(0,0,0,.62));pointer-events:none}
.story-visual .scap{position:absolute;left:24px;bottom:22px;z-index:2;color:#fff}
.story-visual .scap b{font-family:var(--font);font-size:19px;font-weight:700;display:block;margin-bottom:4px}
.story-visual .scap span{font-size:13px;color:#A8A096;letter-spacing:1px}
.story-copy p{color:var(--muted);font-size:16px;margin-bottom:18px;line-height:1.8}
.story-copy strong{color:var(--slate);font-weight:600}
.timeline{margin-top:30px;border-left:2px solid var(--line);padding-left:26px;display:flex;flex-direction:column;gap:22px}
.tl{position:relative}
.tl::before{content:"";position:absolute;left:-33px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--copper);box-shadow:0 0 0 4px rgba(201,168,118,.16)}
.tl .ty{font-family:var(--font);font-size:17px;font-weight:700;color:var(--copper)}
.tl .tt{font-size:15px;color:var(--ink);margin-top:3px;line-height:1.7}

/* ---------- Contact 影像装饰卡 ---------- */
.contact-scene{margin-top:22px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);min-height:180px;background:var(--bg-3);position:relative}
.contact-scene .pv{position:absolute;left:0;right:0;top:-18%;bottom:-18%;background:url("../images/product-scene.png") center / cover no-repeat;background-image:image-set(url("../images/product-scene.webp") type("image/webp"),url("../images/product-scene.png") type("image/png"));will-change:transform;transform:translate3d(0,var(--py,0px),0) scale(1.06);z-index:0}
.contact-scene::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,transparent 40%,rgba(0,0,0,.58))}
.contact-scene .csc{position:absolute;left:20px;bottom:16px;z-index:2;color:#fff;font-weight:600;font-size:14px;text-shadow:0 2px 10px rgba(0,0,0,.55)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq{border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);padding:20px 22px;transition:border-color .4s,box-shadow .4s var(--ease),transform .4s var(--ease)}
.faq:hover{border-color:rgba(201,168,118,.3);box-shadow:var(--glass-shadow)}
.faq .q{font-weight:700;color:var(--slate);font-size:15.5px;display:flex;gap:10px;align-items:flex-start}
.faq .q::before{content:"Q";flex:none;width:22px;height:22px;border-radius:2px;background:rgba(201,168,118,.12);color:var(--copper);font-size:13px;display:grid;place-items:center;margin-top:1px}
.faq .a{color:var(--muted);font-size:14px;margin-top:10px;line-height:1.8;padding-left:32px}

/* ---------- 转化增强：移动端固定咨询条 + PC 悬浮客服 ---------- */
.mbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;grid-template-columns:1fr 1fr 1fr;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:rgba(8,9,11,.94);backdrop-filter:blur(16px);border-top:1px solid var(--line);box-shadow:0 -12px 32px -20px rgba(0,0,0,.9)}
.mbar a{display:flex;align-items:center;justify-content:center;gap:8px;height:46px;border-radius:var(--radius);font-weight:700;font-size:15px}
.mbar .m-call{background:var(--surface-2);color:var(--slate);border:1px solid var(--line)}
.mbar .m-quote{background:var(--copper-grad);color:#050505}
.mbar .m-wa{background:#25D366;color:#06301a;border:1px solid rgba(0,0,0,.06)}
.mbar svg{width:18px;height:18px}

.fab{position:fixed;right:24px;bottom:86px;z-index:46;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.fab-btn{display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 20px 0 16px;border-radius:999px;background:var(--copper-grad);color:#050505;font-weight:700;font-size:14.5px;border:0;cursor:pointer;box-shadow:0 12px 30px -12px rgba(201,168,118,.4);transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.fab-btn:hover{transform:translateY(-3px);box-shadow:0 20px 42px -14px rgba(201,168,118,.5)}
.fab-btn svg{width:20px;height:20px}
.fab-btn.alt{background:var(--surface);color:var(--slate);border:1px solid var(--line);box-shadow:var(--glass-shadow)}
.fab-btn.fab-wa{background:#25D366;color:#fff;box-shadow:0 12px 30px -12px rgba(37,211,102,.5)}
.fab-btn.fab-wa:hover{transform:translateY(-3px);box-shadow:0 20px 42px -14px rgba(37,211,102,.6)}

/* ---------- Preloader (signature entrance · 熔炉) ---------- */
.preloader{position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:30px;background:radial-gradient(120% 120% at 50% 40%,#0B0B0B,#0A0A0A);transition:opacity .65s var(--ease),visibility .65s}
.preloader.done{opacity:0;visibility:hidden;pointer-events:none}
.pl-logo{width:120px;height:120px}
.pl-logo path.hex{fill:none;stroke:url(#pqCopper);stroke-width:5;stroke-linejoin:round;stroke-dasharray:var(--len,360);stroke-dashoffset:var(--len,360);animation:pl-draw .82s var(--ease) forwards}
.pl-logo .wing{fill:url(#pqCopper);opacity:0;animation:pl-fade .5s ease .72s forwards}
.pl-bar{width:184px;height:3px;border-radius:3px;background:rgba(255,255,255,.1);overflow:hidden}
.pl-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,#8B6F3F,#C9A876,#E8C896);animation:pl-fill .82s var(--ease) forwards}
.preloader .pl-tip{color:var(--muted-2);font-size:12px;letter-spacing:4px;text-transform:uppercase;opacity:0;animation:pl-fade .5s ease .55s forwards}
@keyframes pl-draw{to{stroke-dashoffset:0}}
@keyframes pl-fill{to{width:100%}}

/* ---------- 工厂实时时钟 & 快速估价器（2026-09-13） ---------- */
.pq-clock{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-variant-numeric:tabular-nums;font-size:14px}
.pq-clock-dot{width:9px;height:9px;border-radius:50%;background:#7c818a;flex:none;transition:background .4s}
.pq-clock-dot.on{background:#35c46f;box-shadow:0 0 0 3px rgba(53,196,111,.16)}
.pq-clock-time{font-weight:700;color:var(--slate);letter-spacing:.5px}
.pq-clock-status{color:var(--muted);font-size:13px}
.q-grid input[type=range]{accent-color:#C9A876;height:22px}
@media (max-width:900px){.q-grid{grid-template-columns:1fr!important}}
@keyframes pl-fade{to{opacity:1}}

/* ---------- Keyframes ---------- */
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(201,168,118,.35)}70%{box-shadow:0 0 0 10px rgba(201,168,118,0)}100%{box-shadow:0 0 0 0 rgba(201,168,118,0)}}
@keyframes pulse-glow{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:.9;transform:scale(1.12)}}
@keyframes wheel{0%{opacity:1;top:6px}100%{opacity:0;top:18px}}
@keyframes scroll-left{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes ripple{to{transform:translate(-50%,-50%) scale(2.6);opacity:0}}

/* ---------- 精密能力 · 参数可视化 ---------- */
.capability{background:var(--bg-2)}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.cap{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--radius);padding:24px 22px;position:relative;overflow:hidden;transition:transform .6s var(--ease-soft),border-color .6s var(--ease-soft),box-shadow .6s var(--ease-soft)}
.cap::before{content:"";position:absolute;inset:0;background:radial-gradient(120% 80% at 100% 0%,rgba(201,168,118,.06),transparent 60%);pointer-events:none}
.cap:hover{border-color:rgba(201,168,118,.35);transform:translateY(-4px);box-shadow:var(--glass-shadow-soft)}
.cap-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.cap-k{font-size:14px;letter-spacing:.5px;color:var(--muted)}
.cap-v{font-family:var(--font);font-size:30px;font-weight:800;color:var(--slate);line-height:1;font-variant-numeric:tabular-nums}
.cap-v small{font-size:13px;color:var(--copper);margin-left:3px;font-family:var(--font);filter:none}
.cap-bar{height:6px;border-radius:2px;background:rgba(255,255,255,.07);margin:16px 0 12px;overflow:hidden}
.cap-bar i{display:block;height:100%;width:0;border-radius:2px;background:linear-gradient(90deg,#8B6F3F,#C9A876,#E8C896);transition:width 1.4s var(--ease-soft)}
.cap.in .cap-bar i{width:var(--w)}
.cap-note{font-size:12.5px;color:var(--muted-2);letter-spacing:.3px}
@media (max-width:860px){.cap-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.cap-grid{grid-template-columns:1fr}}

/* =========================================================
   本地 AI 智能问答组件（暗黑重工业 · 熔橙玻璃）
   ========================================================= */
.pq-ai{position:fixed;right:22px;bottom:22px;z-index:80}
.pq-ai-btn{
  min-width:106px;height:52px;padding:0 18px;border-radius:26px;
  border:1px solid rgba(201,168,118,.55);
  background:linear-gradient(135deg,#E8C896 0%,#C9A876 55%,#A8854F 100%);
  color:#141008;cursor:pointer;
  display:flex;align-items:center;justify-content:center;gap:9px;
  box-shadow:0 12px 30px -12px rgba(0,0,0,.55);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
  position:relative;
}
.pq-ai-btn svg{flex:0 0 auto}
.pq-ai-btn-txt{font-size:14.5px;font-weight:700;letter-spacing:.02em;white-space:nowrap;line-height:1}
.pq-ai-btn:hover{transform:translateY(-3px) scale(1.04);box-shadow:0 20px 44px -14px rgba(201,168,118,.55)}
.pq-ai-btn.active{transform:scale(.92)}
.pq-ai-btn-dot{position:absolute;top:6px;right:6px;width:11px;height:11px;border-radius:50%;background:#36d399;border:2px solid #0A0A0A;box-shadow:0 0 8px #36d399;animation:pulseDot 2s ease-in-out infinite}
@keyframes pulseDot{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.25);opacity:.6}}
.pq-ai-panel{
  position:absolute;right:0;bottom:72px;width:380px;max-width:calc(100vw - 32px);height:560px;max-height:calc(100vh - 120px);
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--radius-lg);
  background:rgba(13,15,18,.94);backdrop-filter:blur(22px) saturate(140%);-webkit-backdrop-filter:blur(22px) saturate(140%);
  border:1px solid rgba(255,255,255,.13);box-shadow:var(--glass-shadow-lg);
  opacity:0;transform:translateY(16px) scale(.96);pointer-events:none;
  transition:opacity .35s var(--ease),transform .35s var(--ease);
}
.pq-ai-panel.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
.pq-ai-head{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line-soft);background:linear-gradient(180deg,rgba(201,168,118,.07),transparent)}
.pq-ai-avatar,.pq-ai-ava{flex:0 0 auto;width:38px;height:38px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:800;font-size:18px;color:#050505;background:var(--copper-grad);box-shadow:0 6px 16px -6px rgba(201,168,118,.5)}
.pq-ai-htxt{display:flex;flex-direction:column;line-height:1.3;flex:1}
.pq-ai-htxt b{font-size:15px;color:var(--slate)}
.pq-ai-htxt span{font-size:11.5px;color:var(--muted)}
.pq-ai-close,.pq-ai-clear{flex:0 0 auto;width:30px;height:30px;border-radius:var(--radius);border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;font-size:14px;line-height:1;transition:color .25s,border-color .25s,background .25s}
.pq-ai-close:hover,.pq-ai-clear:hover{color:var(--copper-soft);border-color:rgba(201,168,118,.45);background:rgba(201,168,118,.08)}
.pq-ai-body{flex:1;overflow-y:auto;padding:16px 16px 6px;display:flex;flex-direction:column;gap:12px;scrollbar-width:thin}
.pq-ai-body::-webkit-scrollbar{width:6px}
.pq-ai-body::-webkit-scrollbar-thumb{background:rgba(201,168,118,.3);border-radius:6px}
.pq-ai-msg{display:flex;gap:9px;align-items:flex-end;max-width:88%}
.pq-ai-msg.bot{align-self:flex-start}
.pq-ai-msg.user{align-self:flex-end;flex-direction:row-reverse}
.pq-ai-msg .pq-ai-bubble{padding:10px 13px;border-radius:var(--radius);font-size:13.5px;line-height:1.7;color:var(--ink);background:var(--surface-2);border:1px solid var(--line-soft);word-break:break-word}
.pq-ai-msg.bot .pq-ai-bubble{border-top-left-radius:2px}
.pq-ai-msg.user .pq-ai-bubble{background:linear-gradient(135deg,rgba(201,168,118,.2),rgba(201,168,118,.08));border-color:rgba(201,168,118,.3);color:var(--slate-2);border-top-right-radius:2px}
.pq-ai-msg .pq-ai-bubble a{color:#E8C896;text-decoration:underline}
.pq-ai-msg .pq-ai-bubble b{color:#F5E6C8;font-weight:700}
.pq-ai-ava{flex:0 0 auto;width:30px;height:30px;border-radius:var(--radius);font-size:14px}
.pq-ai-msg.typing .pq-ai-bubble{display:flex;gap:4px;padding:13px 14px}
.pq-ai-msg.typing .pq-ai-bubble i{width:6px;height:6px;border-radius:50%;background:var(--copper);opacity:.5;animation:aiTyping 1.1s infinite}
.pq-ai-msg.typing .pq-ai-bubble i:nth-child(2){animation-delay:.18s}
.pq-ai-msg.typing .pq-ai-bubble i:nth-child(3){animation-delay:.36s}
@keyframes aiTyping{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-5px);opacity:1}}
.pq-ai-chips{display:flex;flex-wrap:wrap;gap:7px;padding:10px 14px 4px}
.pq-ai-chip{padding:6px 11px;border-radius:2px;font-size:12px;color:var(--copper);background:rgba(201,168,118,.07);border:1px solid rgba(201,168,118,.28);cursor:pointer;transition:background .25s,transform .2s}
.pq-ai-chip:hover{background:rgba(201,168,118,.15);transform:translateY(-1px)}
.pq-ai-input{display:flex;gap:8px;padding:12px 14px 14px;border-top:1px solid var(--line-soft)}
.pq-ai-input input{flex:1;height:42px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface-2);color:var(--slate);padding:0 14px;font-size:13.5px;outline:none;transition:border-color .25s,box-shadow .25s}
.pq-ai-input input:focus{border-color:var(--copper);box-shadow:0 0 0 3px rgba(201,168,118,.12)}
.pq-ai-input input::placeholder{color:var(--muted-2)}
.pq-ai-send{flex:0 0 auto;width:42px;height:42px;border-radius:var(--radius);border:none;cursor:pointer;color:#050505;background:var(--copper-grad);font-size:15px;box-shadow:0 8px 18px -8px rgba(201,168,118,.45);transition:transform .2s,box-shadow .25s}
.pq-ai-send:hover{transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(201,168,118,.55)}
@media (max-width:480px){
  .pq-ai{right:14px;bottom:calc(104px + env(safe-area-inset-bottom))}
  .pq-ai-panel{width:calc(100vw - 28px);height:74vh;bottom:calc(174px + env(safe-area-inset-bottom));max-height:calc(100dvh - 190px)}
}

/* =========================================================
   材质与表面处理专区 + CTA 转化带（暗黑重工业 · 熔橙）
   ========================================================= */
.mats{background:var(--bg)}
.mat-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.mat-card{border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--surface);padding:30px 28px;position:relative;overflow:hidden;contain:layout;box-shadow:0 10px 28px -24px rgba(0,0,0,.8);transition:transform .5s var(--ease),border-color .5s,box-shadow .5s var(--ease)}
.mat-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--copper),transparent 65%)}
.mat-card:hover{transform:translateY(-6px);border-color:rgba(201,168,118,.4);box-shadow:var(--glass-shadow)}
.mat-head{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:700;letter-spacing:1.5px;color:var(--slate);margin-bottom:22px}
.mat-head .ic{width:30px;height:30px;color:var(--copper);flex:none}
.mat-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;padding:9px 16px;border-radius:2px;
  border:1px solid var(--line);background:var(--surface-2);
  font-size:14px;font-weight:500;letter-spacing:.3px;color:var(--ink);
  transition:transform .35s var(--ease),border-color .35s,color .35s,background .35s;
}
.chip:hover{transform:translateY(-2px);border-color:var(--copper);color:#E8C896;background:rgba(201,168,118,.07)}

/* CTA 转化带：熔橙渐变底 + 警示条纹顶边 */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#0B0B0B 0%,#0B0B0B 45%,var(--bg-2) 100%);
  border-top:1px solid rgba(201,168,118,.35);border-bottom:1px solid var(--line-soft);
  padding:64px 0;
}
.cta-band::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:repeating-linear-gradient(-45deg,var(--copper) 0 8px,transparent 8px 16px)}
.cta-band::after{content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(201,168,118,.14),transparent 65%);filter:blur(12px);pointer-events:none}
.cta-wrap{display:flex;align-items:center;justify-content:space-between;gap:40px;position:relative;z-index:1}
.cta-title{font-size:clamp(26px,3.4vw,40px);font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--slate);margin-bottom:12px}
.cta-title .hl{color:transparent;background:linear-gradient(120deg,#E8C896,#C9A876 60%,#8B6F3F);-webkit-background-clip:text;background-clip:text}
.cta-sub{color:var(--muted);font-size:15.5px;letter-spacing:.5px}
.cta-actions{display:flex;flex-direction:column;align-items:flex-end;gap:14px;flex:none}
.cta-tel{display:inline-flex;align-items:baseline;gap:8px;color:var(--muted);font-size:14px;letter-spacing:.5px;transition:color .3s}
.cta-tel b{font-size:19px;font-weight:800;color:var(--slate);letter-spacing:1px;font-variant-numeric:tabular-nums;transition:color .3s}
.cta-tel:hover{color:var(--copper-soft)}
.cta-tel:hover b{color:#E8C896}

/* =========================================================
   布局精修（渐进增强，不破坏既有结构）
   ========================================================= */
section[id],footer[id]{scroll-margin-top:84px}
.hero-title,h2.section-title,.modal-title{text-wrap:balance}
.hero-sub,.lead,.about-copy p,.story-copy p{text-wrap:pretty}
.faq:hover{transform:translateY(-3px)}
.btn:focus-visible,.pq-ai-btn:focus-visible,.pq-ai-chip:focus-visible,
.pq-ai-send:focus-visible,.pq-ai-close:focus-visible,.to-top:focus-visible,
.burger:focus-visible,.lang-select:focus-visible,.btn-light:focus-visible,.btn-glass:focus-visible,.nav-cta:focus-visible{outline:2px solid rgba(201,168,118,.6);outline-offset:3px}
.foot-grid{align-items:start}
.section-head .lead{margin-top:8px}

/* ---------- Responsive ---------- */
@media(max-width:1180px){
  .nav-links{gap:22px}
  .brand-name{font-size:20px}
  .nav-right{gap:12px}
}
/* <1024：导航收进汉堡（参照规格的 md 断点），Hero 保持全屏视频 + 底部内容 */
@media(max-width:1024px){
  .nav-links{display:none}
  .burger{display:flex}
  .site-header{padding:16px 16px 0}
  .hero-bottom{padding:100px 20px 40px}
}
@media(min-width:1024px){
  .site-header{padding:24px 48px 0}
  .hero-bottom{padding:120px 48px 48px}
  .hero-grid{grid-template-columns:1fr 1fr;align-items:end}
  .hero-side{justify-content:flex-end}
}
@media(min-width:1280px){
  .site-header{padding:24px 64px 0}
  .hero-bottom{padding:120px 64px 64px}
}
@media(max-width:980px){
  .about-grid,.contact-grid,.story-grid,.mat-grid{grid-template-columns:1fr}
  .about-grid,.contact-grid,.story-grid{gap:36px}
  .cta-wrap{flex-direction:column;align-items:flex-start;gap:28px}
  .cta-actions{align-items:flex-start}
  .stats-grid,.cert-grid{grid-template-columns:repeat(2,1fr)}
  .trust-cases{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .faq-list{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step{border-right:0;border-bottom:1px solid var(--line-soft)}
  .bento{grid-template-columns:repeat(2,1fr);grid-auto-rows:auto}
  .c-wide,.c-mid,.c-sm{grid-column:span 2}
  .m-grid{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .story-visual{min-height:320px}
}
@media(max-width:680px){
  .wrap{padding:0 18px}
  .brand-name{font-size:18px}
  .nav-cta{display:none}
  .cards,.stats-grid,.cert-grid,.logo-wall{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-title{font-size:clamp(34px,10vw,48px)}
  .hero-tag{white-space:normal}
  .mbar{display:grid}
  .fab{display:none}
  body{padding-bottom:70px}
  .to-top{bottom:calc(174px + env(safe-area-inset-bottom))}
  .pq-ai{bottom:calc(104px + env(safe-area-inset-bottom))}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001ms!important}
  .reveal,.pq-fade{opacity:1;transform:none;filter:none}
  .hero-title .ch{opacity:1;transform:none}
  .steps .rail{transform:scaleX(1)}
  html{scroll-behavior:auto}
  .fx-shine::after{display:none}
  .fx-tilt,.fx-magnetic{transform:none!important}
}

/* =========================================================
   fx.js 配套样式（高级交互动效，2026-08-22）
   ========================================================= */

/* ---------- ① 顶部阅读进度条（金线） ---------- */
.fx-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:200;
  background:rgba(201,168,118,.08);pointer-events:none;
}
.fx-progress>i{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,transparent,#C9A876 30%,#E8C896 50%,#C9A876 70%,transparent);
  box-shadow:0 0 8px rgba(201,168,118,.7);
  transition:width .12s linear;
}

/* ---------- - 标题金色流光（hero / section） ---------- */
.fx-shine{position:relative;overflow:hidden;isolation:isolate}
.fx-shine::after{
  content:"";position:absolute;inset:-2px;pointer-events:none;
  background:linear-gradient(115deg,
    transparent 30%,
    rgba(245,230,200,.22) 44%,
    rgba(245,230,200,.55) 50%,
    rgba(245,230,200,.22) 56%,
    transparent 70%);
  mix-blend-mode:screen;
  transform:translateX(-120%);
  transition:transform 1.6s cubic-bezier(.22,.61,.36,1);
}
.fx-shine.fx-shine-on::after{transform:translateX(120%)}
.hero-title.fx-shine::after{inset:-10% -2px}

/* ---------- ③ 卡片 3D 倾斜 + 金色高光 ---------- */
.fx-tilt{position:relative;transform-style:preserve-3d;will-change:transform;transition:transform .3s var(--ease)}
.fx-tilt:hover{box-shadow:0 20px 50px -20px rgba(201,168,118,.35),0 0 0 1px rgba(201,168,118,.18) inset}
.fx-glare{
  position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  opacity:0;transition:opacity .35s ease;
  background:radial-gradient(220px 220px at var(--gx,50%) var(--gy,50%),
    rgba(245,230,200,.22) 0%,
    rgba(201,168,118,.08) 35%,
    transparent 65%);
}
.fx-tilt:hover .fx-glare{opacity:1}

/* ---------- ④ 磁吸按钮 ---------- */
.fx-magnetic{display:inline-block;will-change:transform;transition:transform .25s var(--ease)}

/* 优先减弱文字按钮被磁吸位移影响阅读 —— 限制最大位移 */
@media(hover:hover) and (pointer:fine){
  .fx-magnetic{transition:transform .18s var(--ease)}
}

/* =========================================================
   暗夜金专属：衬线大标题 + 金线分割 + 高端细节（2026-08-22）
   只增强不动既有结构，CSS 变量名不变
   ========================================================= */

/* 衬线大标题：Hero 与所有 section title 用 Instrument Serif / Cormorant / 系统衬线，
   增强"沉稳大气高端"的奢侈品调性。中文降级到思源宋体/宋体。 */
.hero-title,.section-title,.modal-title,.footer-name{
  font-family:"Instrument Serif","Cormorant Garamicond","Source Han Serif SC","Songti SC","Georgia",serif;
  font-weight:500;letter-spacing:-.025em;
}
.hero-title{font-weight:500}

/* Hero 标题字号略加大，行高更舒展，贴合高端杂志感 */
.hero-title{font-size:clamp(40px,6vw,84px);line-height:1.05}

/* Hero eyebrow 加细金线（高级感常用手法） */
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:14px;
  padding-bottom:10px;border-bottom:1px solid rgba(201,168,118,.35);
  letter-spacing:4px;
}

/* section title 左侧加竖金线装饰 */
.section-title{position:relative;padding-left:22px}
.section-title::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;
  width:2px;background:linear-gradient(180deg,transparent,var(--copper) 30%,var(--copper) 70%,transparent);
}

/* 按钮升级：btn-light 加更细腻的金色描边光晕 */
.btn-light{
  box-shadow:0 0 0 1px rgba(245,230,200,.15) inset;
  filter:drop-shadow(0 12px 28px rgba(201,168,118,.35));
}
.btn-light:hover{filter:drop-shadow(0 18px 42px rgba(201,168,118,.55))}

/* btn-glass 加金渐变描边（hover 触发） */
.btn-glass{position:relative;background:transparent}
.btn-glass::after{
  content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;
  background:linear-gradient(135deg,rgba(245,230,200,.6),rgba(201,168,118,.15) 40%,transparent 70%);
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  pointer-events:none;opacity:0;transition:opacity .4s ease;
}
.btn-glass:hover::after{opacity:1}

/* 液态玻璃导航条：加深底色 + 加金色描边光感 */
.liquid-glass{background:rgba(10,10,10,.55)!important;backdrop-filter:blur(20px) saturate(1.2)}
.liquid-glass::before{
  background:linear-gradient(180deg,rgba(245,230,200,.4) 0%,rgba(201,168,118,.18) 30%,rgba(201,168,118,0) 60%)!important;
}

/* 数据卡数字 / 工艺编号：保留 tabular-nums 并加细微金边 */
.stat .num,.cap-v,.reveal-img figcaption{
  font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#F5E6C8 0%,#C9A876 60%,#8B6F3F 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:600;
}

/* 章节之间加细金线分隔（让长页面有"翻章节"质感） */
.section-divider{
  height:1px;width:100%;max-width:1180px;margin:0 auto;
  background:linear-gradient(90deg,transparent,rgba(201,168,118,.4) 50%,transparent);
  opacity:.6;
}

/* 选中文本：金色底 + 黑字（高级感标配） */
::selection{background:linear-gradient(180deg,#C9A876,#8B6F3F);color:#050505}

/* 页脚顶部加一道更明显的金色装饰线 */
.site-footer{border-top:1px solid rgba(201,168,118,.2);position:relative}
.site-footer::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:160px;height:1px;
  background:linear-gradient(90deg,transparent,var(--copper),transparent);
}

/* =========================================================
   Footer · 创始人签名区（暗夜金 · 名牌式）
   ========================================================= */
.foot-founder{
  position:relative;padding:22px 22px 18px;
  border:1px solid rgba(201,168,118,.22);
  border-radius:6px;
  background:linear-gradient(180deg,rgba(201,168,118,.05),rgba(201,168,118,.01));
  display:flex;flex-direction:column;gap:10px;
}
.foot-founder::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:2px;
  background:linear-gradient(180deg,transparent,var(--copper) 30%,var(--copper) 70%,transparent);
}
.founder-tag{
  display:inline-block;align-self:flex-start;
  font-size:11px;letter-spacing:2px;text-transform:uppercase;
  color:var(--copper);font-weight:600;
  padding:3px 9px;border:1px solid rgba(201,168,118,.35);border-radius:2px;
}
.founder-name{
  font-family:"Instrument Serif","Cormorant Garamicond","Source Han Serif SC",Georgia,serif;
  font-size:28px;font-weight:500;letter-spacing:-.02em;color:var(--slate);line-height:1.1;
}
.founder-name sup{font-size:13px;color:var(--muted);font-weight:400;letter-spacing:.05em;margin-left:6px;font-style:italic}
.founder-bio{font-size:13.5px;line-height:1.7;color:var(--muted);max-width:42ch}
.founder-cta{
  align-self:flex-start;display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--copper);
  padding:6px 12px;border:1px solid rgba(201,168,118,.35);border-radius:2px;
  transition:background .25s ease,border-color .25s ease,color .25s ease;
}
.founder-cta svg{width:14px;height:14px}
.founder-cta:hover{background:var(--copper);color:#0A0A0A;border-color:var(--copper)}

/* footer grid 升级为 4 列布局（容纳 founder 卡片） */
.foot-grid{grid-template-columns:1.3fr 1fr 1fr 1.3fr;gap:46px}
@media(max-width:980px){
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .foot-founder{grid-column:1/-1;max-width:520px}
}
@media(max-width:560px){
  .foot-grid{grid-template-columns:1fr}
}

/* =========================================================
   性能分级降级（配合 lite-flag.js 的 .pq-tier-N 与 main.js 的 Quality）
   ---------------------------------------------------------
   背景：backdrop-filter 与大面积 blur 是最重的 GPU 合成开销；
   长驻 will-change 会持续占用 GPU 内存；视差位移在滚动时触发
   大量图层重算。此前检测已存在但未接线，导致低端设备浏览卡顿。

   分级：
     .pq-tier-2  中端设备 —— 削减大半径模糊
     .pq-tier-3  低端 / 省流量 / 弱网 —— 关闭全部毛玻璃与视差
     .pq-fps-low 运行时实测 FPS < 45 连续 3s —— 动态进一步降级
     .pq-fps-mid 运行时 FPS 45~55 —— 轻度降级
   ========================================================= */

/* ---- tier2：把大半径模糊压到 6~8px（保留质感，显著降低采样成本） ---- */
.pq-tier-2 .modal-scrim::before{backdrop-filter:blur(8px) saturate(1.1);-webkit-backdrop-filter:blur(8px) saturate(1.1)}
.pq-tier-2 .mnav{backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.pq-tier-2 .pq-ai-panel{backdrop-filter:blur(8px) saturate(120%);-webkit-backdrop-filter:blur(8px) saturate(120%)}
.pq-tier-2 .mbar{backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.pq-tier-2 .modal-close,
.pq-tier-2 .to-top{backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
/* 液态玻璃 v2 的 22px 模糊对中端设备偏重，压到 10px 并保留饱和 */
.pq-tier-2 .liquid-glass{backdrop-filter:blur(10px) saturate(150%);-webkit-backdrop-filter:blur(10px) saturate(150%)}
.pq-tier-2 .site-header.scrolled .nav-bar{backdrop-filter:blur(14px) saturate(160%);-webkit-backdrop-filter:blur(14px) saturate(160%)}

/* ---- tier3 / 低帧率：关闭全部毛玻璃，改用不透明背景保证可读性 ---- */
.pq-tier-3 .liquid-glass,
.pq-tier-3 .mnav,
.pq-tier-3 .modal-close,
.pq-tier-3 .to-top,
.pq-tier-3 .mbar,
.pq-tier-3 .pq-ai-panel,
.pq-fps-low .liquid-glass,
.pq-fps-low .mnav,
.pq-fps-low .modal-close,
.pq-fps-low .to-top,
.pq-fps-low .mbar,
.pq-fps-low .pq-ai-panel{
  backdrop-filter:none !important;
  -webkit-backdrop-filter:none !important;
}
/* 关闭毛玻璃后必须补不透明底色，否则文字会透到背景上不可读 */
.pq-tier-3 .pq-ai-panel,
.pq-fps-low .pq-ai-panel{background:rgba(13,15,18,.99)}
.pq-tier-3 .mnav,
.pq-fps-low .mnav{background:rgba(8,9,11,.99)}
.pq-tier-3 .mbar,
.pq-fps-low .mbar{background:rgba(8,9,11,.98)}
.pq-tier-3 .liquid-glass,
.pq-fps-low .liquid-glass{background:rgba(10,10,10,.92)!important}
/* 低端设备关闭流动光泽伪元素（持续动画会一直唤醒合成器） */
.pq-tier-3 .liquid-glass::after,
.pq-fps-low .liquid-glass::after{display:none !important}
.pq-tier-3 .modal-scrim::before,
.pq-fps-low .modal-scrim::before{
  backdrop-filter:none !important;
  -webkit-backdrop-filter:none !important;
  background:rgba(6,7,8,.93);
}

/* ---- 视差降级：滚动时大图位移是最重的合成开销之一 ---- */
.pq-tier-3 .pv,
.pq-fps-low .pv{transform:none !important;will-change:auto !important}

/* ---- 收敛长驻 will-change（持续占用 GPU 内存会拖慢整体合成） ---- */
.pq-tier-3 .pv,
.pq-tier-3 .to-top,
.pq-tier-3 .modal-surface,
.pq-fps-low .pv,
.pq-fps-low .to-top,
.pq-fps-low .modal-surface{will-change:auto !important}

/* ---- 低端设备关闭装饰性无限动画（持续唤醒合成器，空耗电量与帧预算） ---- */
.pq-tier-3 .pq-ai-btn-dot,
.pq-fps-low .pq-ai-btn-dot{animation:none !important}

/* ---- mid 档轻度降级：仅压低模糊半径，保留全部动效 ---- */
.pq-fps-mid .modal-scrim::before{backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.pq-fps-mid .pq-ai-panel{backdrop-filter:blur(12px) saturate(130%);-webkit-backdrop-filter:blur(12px) saturate(130%)}

/* ---- 尊重系统「减少动效」偏好：与 tier3 同等处理 ---- */
@media (prefers-reduced-motion: reduce){
  .pv{transform:none !important;will-change:auto !important}
  .pq-ai-btn-dot{animation:none !important}
}

/* =========================================================
   网页美化增强（视觉细节打磨）
   ---------------------------------------------------------
   目标：在不改变布局骨架（VEX 式结构）的前提下提升精致度——
   导航下划线滑入、品牌微光、卡片上浮、按钮质感、Hero 层次。
   全部使用 transform / opacity / box-shadow，走 GPU 合成；
   低端设备由下方降级规则自动关闭。
   ========================================================= */

/* ---- 导航链接：金色下划线由中心滑入 ---- */
.nav-links a{position:relative}
.nav-links a::after{
  content:'';
  position:absolute;left:0;right:0;bottom:-3px;height:2px;
  background:linear-gradient(90deg, transparent 0%, var(--copper) 50%, transparent 100%);
  transform:scaleX(0);transform-origin:center;
  opacity:0;
  transition:transform .38s var(--ease), opacity .38s var(--ease);
  pointer-events:none;
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after{transform:scaleX(1);opacity:1}
.nav-links a:hover{color:var(--copper-soft)}
/* 当前激活项保持常亮下划线（原为 text-decoration，改由伪元素统一呈现） */
.nav-links a.active{text-decoration:none}
.nav-links a.active::after{transform:scaleX(1);opacity:.85}

/* ---- 品牌名：暖金微光，提升识别度 ---- */
.brand-name{
  text-shadow:0 1px 14px rgba(201,168,118,.20);
  transition:text-shadow .35s var(--ease);
}
.brand:hover .brand-name{text-shadow:0 1px 20px rgba(201,168,118,.38)}

/* ---- 导航 CTA 按钮：光泽扫过 ---- */
.nav-cta{position:relative;overflow:hidden}
.nav-cta::after{
  content:'';position:absolute;top:0;bottom:0;left:-45%;width:38%;
  background:linear-gradient(100deg, transparent, rgba(255,255,255,.55), transparent);
  transform:skewX(-18deg);
  animation:btn-sheen 4.2s ease-in-out infinite;
  pointer-events:none;
}
@keyframes btn-sheen{
  0%,55%{left:-45%;opacity:0}
  62%{opacity:1}
  88%{left:120%;opacity:1}
  94%,100%{left:120%;opacity:0}
}

/* ---- 交互卡片：hover 上浮 + 暖金光晕 ---- */
.pcard,.step,.cell{
  transition:transform .42s var(--ease),box-shadow .42s var(--ease),border-color .42s var(--ease);
}
.pcard:hover,.step:hover,.cell:hover{
  transform:translateY(-5px);
  box-shadow:0 18px 44px -20px rgba(0,0,0,.85),0 0 0 1px rgba(201,168,118,.20);
}

/* ---- Hero 主标题：轻微渐变与文字阴影，增强层次 ---- */
.hero-title,.hero h1{
  text-shadow:0 2px 30px rgba(0,0,0,.55);
}

/* ---- 滚动后导航条略微收窄，视觉更利落 ---- */
.site-header{transition:padding .35s var(--ease)}
.site-header.scrolled{padding:14px 24px 0}

/* ---- 图片/视差容器：边缘柔化，与暗色背景融合更自然 ---- */
.about-visual,.story-visual,.contact-scene{
  -webkit-mask-image:linear-gradient(180deg,transparent 0%,#000 8%,#000 92%,transparent 100%);
  mask-image:linear-gradient(180deg,transparent 0%,#000 8%,#000 92%,transparent 100%);
}

/* ---- 全站链接焦点可见性（无障碍 + 精致度） ---- */
a:focus-visible,button:focus-visible,select:focus-visible{
  outline:2px solid var(--copper);
  outline-offset:3px;
  border-radius:3px;
}

/* ---- 美化增强的降级：低端 / 低帧率设备关闭持续动画与位移 ---- */
.pq-tier-3 .nav-cta::after,
.pq-fps-low .nav-cta::after{display:none !important}
.pq-tier-3 .pcard:hover,
.pq-tier-3 .step:hover,
.pq-tier-3 .cell:hover,
.pq-fps-low .pcard:hover,
.pq-fps-low .step:hover,
.pq-fps-low .cell:hover{transform:none !important}
/* 尊重系统「减少动效」偏好 */
@media (prefers-reduced-motion: reduce){
  .nav-cta::after{animation:none;opacity:0}
  .nav-links a::after{transition:none}
  .pcard:hover,.step:hover,.cell:hover{transform:none}
}