/* ============ 设计令牌 ============ */
:root{
  --ink:#131a22;
  --body:#46525e;
  --muted:#8a96a3;
  --paper:#f4f6f8;
  --paper-2:#eceff3;
  --card:#ffffff;
  --line:#dfe6ec;
  --steel:#2b5d7a;
  --steel-deep:#1d4056;
  --copper:#e0a13c;
  --copper-soft:#f3c980;
  --copper-deep:#b97f22;
  --dark:#141c24;
  --dark-2:#1b2631;
  --dark-card:#22303d;
  --dark-line:#31414f;
  --glass:#9cc4d8;
  --shadow:0 18px 45px rgba(20,28,36,.12);
  --shadow-lg:0 30px 70px rgba(20,28,36,.20);
  --radius:16px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--paper);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:var(--copper);color:#fff}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ============ 眉题 / 标题 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.78rem;letter-spacing:.28em;text-transform:uppercase;
  font-weight:700;color:var(--copper);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--copper);display:inline-block}
.eyebrow.dark{color:var(--copper-soft)}
.sec-title{
  font-size:clamp(1.7rem,3.4vw,2.5rem);
  font-weight:800;line-height:1.3;letter-spacing:.01em;
  margin-top:.55rem;text-wrap:balance;
}
.sec-sub{color:var(--body);margin-top:.9rem;max-width:640px;font-size:1.02rem}
section{position:relative}

/* 区块通用上下留白 */
.sec{padding:88px 0}
.sec--dark{background:var(--dark);color:#e8eef3}
.sec--dark .sec-sub{color:#aebbc8}
.sec--soft{background:var(--paper)}
.sec--line{border-top:1px solid var(--line)}

.sec-head{margin-bottom:46px}
.sec-head.center{text-align:center}
.sec-head.center .sec-sub{margin-left:auto;margin-right:auto}

/* ============ 顶部导航 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:14px 0;
  transition:background .35s var(--ease),box-shadow .35s, padding .35s;
  color:#eaf0f5;
}
.nav .wrap{display:flex;align-items:center;gap:26px}
.nav.scrolled{background:rgba(15,22,30,.92);backdrop-filter:blur(12px);box-shadow:0 8px 30px rgba(0,0,0,.28);padding:9px 0}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand__mark{
  width:40px;height:40px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--steel) 0%,#274f68 60%,var(--copper) 130%);
  display:grid;place-items:center;
  box-shadow:0 4px 14px rgba(0,0,0,.25), inset 0 0 0 1px rgba(255,255,255,.12);
}
.brand__name{font-weight:800;font-size:1.12rem;letter-spacing:.02em;line-height:1.2}
.brand__name small{display:block;font-weight:500;font-size:.66rem;color:#9fb4c3;letter-spacing:.12em;margin-top:2px}
.nav__links{display:flex;gap:4px;margin-left:auto}
.nav__links a{
  padding:8px 14px;border-radius:8px;font-size:.95rem;color:#dbe5ec;
  transition:color .25s,background .25s;position:relative;
}
.nav__links a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav__cta{
  margin-left:6px;display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--copper),var(--copper-deep));
  color:#fff!important;font-weight:700;padding:10px 18px!important;border-radius:10px;
  box-shadow:0 6px 18px rgba(224,161,60,.35);
}
.nav__cta:hover{background:linear-gradient(135deg,var(--copper-soft),var(--copper))!important}
.nav__burger{display:none;width:44px;height:44px;border-radius:10px;position:relative;margin-left:auto}
.nav__burger span{position:absolute;left:11px;right:11px;height:2px;background:#eaf0f5;border-radius:2px;transition:.3s var(--ease)}
.nav__burger span:nth-child(1){top:16px}
.nav__burger span:nth-child(2){top:22px}
.nav__burger span:nth-child(3){top:28px}
.nav__burger.open span:nth-child(1){top:22px;transform:rotate(45deg)}
.nav__burger.open span:nth-child(2){opacity:0}
.nav__burger.open span:nth-child(3){top:22px;transform:rotate(-45deg)}

/* ============ 英雄区 ============ */
.hero{
  background:
    radial-gradient(1000px 480px at 82% -10%,rgba(43,93,122,.55),transparent 60%),
    radial-gradient(700px 420px at 8% 108%,rgba(224,161,60,.16),transparent 60%),
    linear-gradient(160deg,#101820 0%,#16222e 55%,#1a2733 100%);
  color:#eaf0f5;min-height:100svh;display:flex;align-items:center;
  padding:130px 0 70px;position:relative;overflow:hidden;
}
.hero::before{ /* 工程网格纹理 */
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(900px 600px at 60% 40%,#000 40%,transparent 78%);
}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;width:100%}
.hero__badge{
  display:inline-flex;align-items:center;gap:9px;
  border:1px solid rgba(224,161,60,.45);color:var(--copper-soft);
  padding:7px 16px;border-radius:999px;font-size:.82rem;font-weight:600;letter-spacing:.08em;
  background:rgba(224,161,60,.08);
}
.hero__badge .dot{width:7px;height:7px;border-radius:50%;background:var(--copper);box-shadow:0 0 10px var(--copper);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.35}}
.hero h1{
  font-size:clamp(2.35rem,5.4vw,4rem);font-weight:900;line-height:1.22;
  margin:22px 0 20px;letter-spacing:.01em;text-wrap:balance;
}
.hero h1 .em{
  background:linear-gradient(100deg,var(--copper-soft) 10%,var(--copper) 55%,#fff0d6 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .hero__brand{
  font-size:clamp(2.3rem,5vw,3.9rem);font-weight:900;line-height:1.16;
  margin:20px 0 14px;letter-spacing:.02em;text-wrap:balance;
  background:linear-gradient(100deg,#fff 0%,#f2f8fc 30%,var(--copper-soft) 66%,var(--copper) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 2px 18px rgba(224,161,60,.2));
}
.hero .hero__slogan{
  font-size:clamp(1.2rem,2.5vw,1.6rem);font-weight:700;color:#eef4f9;
  margin:-2px 0 12px;letter-spacing:.04em;
}
.hero .hero__slogan .em{
  background:linear-gradient(100deg,var(--copper-soft) 10%,var(--copper) 55%,#fff0d6 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{color:#c2cfda;max-width:560px;font-size:1.06rem}
.hero__actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 30px;border-radius:12px;font-weight:700;font-size:1rem;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s;
}
.btn--primary{background:linear-gradient(135deg,var(--copper),var(--copper-deep));color:#fff;box-shadow:0 10px 26px rgba(224,161,60,.4)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(224,161,60,.5)}
.btn--ghost{border:1px solid rgba(255,255,255,.28);color:#eaf0f5;background:rgba(255,255,255,.04)}
.btn--ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.45);transform:translateY(-2px)}
.btn .arr{transition:transform .25s}
.btn:hover .arr{transform:translateX(4px)}
.hero__chips{display:flex;gap:22px;margin-top:38px;flex-wrap:wrap}
.chip{display:flex;align-items:center;gap:9px;color:#aebdca;font-size:.9rem}
.chip svg{color:var(--copper)}

/* 统计条 */
.stats{
  border-top:1px solid rgba(255,255,255,.1);margin-top:54px;padding-top:28px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.stat__num{font-size:clamp(1.25rem,2.2vw,1.6rem);font-weight:900;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:.01em;white-space:nowrap}
.stat__num em{font-style:normal;color:var(--copper)}
.stat__label{font-size:.85rem;color:#92a5b4;margin-top:2px}

/* 英雄剖面图 */
.hero__fig{position:relative}
.hero__fig svg{width:100%;height:auto;filter:drop-shadow(0 30px 60px rgba(0,0,0,.45))}
.hero__fig .glow{
  position:absolute;inset:-12%;background:radial-gradient(closest-side,rgba(43,93,122,.35),transparent);
  z-index:-1;pointer-events:none;
}

/* ============ 关于 ============ */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.about__lead{font-size:1.14rem;color:var(--steel-deep);font-weight:700;line-height:1.8;border-left:4px solid var(--copper);padding-left:18px;margin:18px 0 16px}
.about p{color:var(--body)}
.about__tick{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px;margin-top:24px}
.about__tick li{display:flex;align-items:center;gap:10px;color:#3d4a56;font-weight:600;font-size:.96rem}
.about__tick li::before{content:"✓";width:22px;height:22px;border-radius:50%;background:#e5efe4;color:#3d7a4e;display:grid;place-items:center;font-size:.78rem;font-weight:800;flex-shrink:0}
.license{margin-top:32px;border-radius:16px;overflow:hidden;background:#fff;border:1px solid #e2e8ee;box-shadow:0 18px 44px rgba(13,20,28,.10)}
.license__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 18px;background:linear-gradient(120deg,#1d4056,#2b5d7a)}
.license__title{color:#fff;font-weight:700;font-size:.92rem;letter-spacing:.06em}
.license__tag{font-size:.74rem;color:rgba(255,255,255,.78);font-weight:600}
.license__stage{display:flex;justify-content:center;align-items:center;min-width:0;padding:20px 16px;background:
  radial-gradient(560px 220px at 50% -30%,rgba(43,93,122,.13),transparent 70%),
  linear-gradient(160deg,#f0f4f7,#e3ebf1)}
.license__stage img{display:block;width:100%;height:auto;max-width:100%;min-width:0;object-fit:contain;border-radius:6px;box-shadow:0 12px 30px rgba(13,20,28,.20);transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.license__stage:hover img{transform:scale(1.04);box-shadow:0 18px 42px rgba(13,20,28,.28)}
.license__cap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;font-size:.84rem;color:#5a6a76;background:#fafbfc;border-top:1px dashed #dfe6ec}
.license__zoom{font-size:.76rem;font-weight:700;color:var(--copper)}
.values{display:grid;gap:16px}
.value{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;display:flex;gap:18px;align-items:flex-start;
  transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.value:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.value__icon{
  width:48px;height:48px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,rgba(43,93,122,.12),rgba(224,161,60,.14));
  display:grid;place-items:center;color:var(--steel);
}
.value h3{font-size:1.06rem;font-weight:800;margin-bottom:4px}
.value p{font-size:.92rem;color:var(--muted)}

/* 时间线 */
.timeline{margin-top:56px}
.timeline h3{font-size:1.1rem;font-weight:800;margin-bottom:22px;display:flex;align-items:center;gap:10px}
.tl{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.tl::before{content:"";position:absolute;top:15px;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--steel),var(--copper))}
.tl li{position:relative;padding-top:44px}
.tl li::before{content:"";position:absolute;top:8px;left:0;width:16px;height:16px;border-radius:50%;background:var(--paper);border:3px solid var(--steel)}
.tl li:nth-last-child(-n+2)::before{border-color:var(--copper)}
.tl li::after{content:"";position:absolute;top:8px;left:16px;width:calc(100% - 16px);height:2px;background:#c9d4dd}
.tl li:last-child::after{display:none}
.tl .y{font-weight:900;color:var(--steel);font-variant-numeric:tabular-nums;font-size:.95rem}
.tl .d{font-size:.86rem;color:var(--body);margin-top:4px;padding-right:14px}

/* ============ 产品 ============ */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prod{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
}
.prod:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.prod__art{
  height:190px;background:
    radial-gradient(420px 200px at 30% -20%,rgba(43,93,122,.18),transparent 65%),
    linear-gradient(160deg,#eef3f7,#e3eaf0);
  display:grid;place-items:center;position:relative;overflow:hidden;
}
.prod__art::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(43,93,122,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(43,93,122,.05) 1px,transparent 1px);background-size:30px 30px;pointer-events:none}
.prod__art svg{width:96px;height:96px;color:var(--steel);transition:transform .4s var(--ease)}
.prod:hover .prod__art svg{transform:scale(1.08) rotate(-1deg);color:var(--steel-deep)}
.prod__body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.prod__tag{font-size:.72rem;font-weight:700;color:var(--copper-deep);background:#fdf3e0;padding:3px 10px;border-radius:999px;align-self:flex-start;letter-spacing:.06em}
.prod h3{font-size:1.16rem;font-weight:800;margin:12px 0 8px}
.prod p{font-size:.92rem;color:var(--muted);flex:1}
.prod__meta{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.prod__meta span{font-size:.76rem;color:var(--steel);background:#edf3f7;border-radius:8px;padding:3px 10px;font-weight:600}

/* ============ 工艺（深色） ============ */
.craft-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.craft__points{display:grid;gap:16px;margin-top:30px}
.craft__points li{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--dark-card);border:1px solid var(--dark-line);border-radius:14px;padding:18px 20px;
  transition:transform .3s var(--ease),border-color .3s;
}
.craft__points li:hover{transform:translateX(6px);border-color:rgba(224,161,60,.5)}
.craft__points .n{
  font-size:.82rem;font-weight:800;color:var(--copper);
  border:1px solid rgba(224,161,60,.5);width:34px;height:34px;border-radius:9px;
  display:grid;place-items:center;flex-shrink:0;background:rgba(224,161,60,.08);
}
.craft__points h4{font-size:1rem;font-weight:800;color:#eef3f7}
.craft__points p{font-size:.86rem;color:#9db0bf;margin-top:2px}

/* 工艺流程步骤 */
.flow{margin-top:64px}
.flow__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.step{
  background:var(--dark-card);border:1px solid var(--dark-line);border-radius:14px;
  padding:22px;position:relative;transition:transform .3s var(--ease),border-color .3s;
}
.step:hover{transform:translateY(-5px);border-color:rgba(224,161,60,.5)}
.step .no{font-size:1.9rem;font-weight:900;color:transparent;-webkit-text-stroke:1.4px var(--steel);line-height:1}
.step:hover .no{-webkit-text-stroke-color:var(--copper)}
.step h5{font-size:.98rem;font-weight:800;color:#eef3f7;margin:12px 0 6px}
.step p{font-size:.82rem;color:#9db0bf}

/* ============ 案例 ============ */
.case-filter{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px}
.case-filter button{
  padding:8px 20px;border-radius:999px;font-size:.9rem;font-weight:600;color:var(--body);
  border:1px solid var(--line);background:var(--card);transition:.25s;
}
.case-filter button.on,.case-filter button:hover{background:var(--steel);color:#fff;border-color:var(--steel)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{
  border-radius:var(--radius);overflow:hidden;background:var(--card);
  border:1px solid var(--line);display:block;position:relative;
  transition:transform .35s var(--ease),box-shadow .35s;
}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case__img{height:210px;position:relative;overflow:hidden}
.case__img svg{width:100%;height:100%;transition:transform .6s var(--ease)}
.case:hover .case__img svg{transform:scale(1.06)}
.case__body{padding:20px 22px 22px}
.case__body h3{font-size:1.04rem;font-weight:800}
.case__body p{font-size:.86rem;color:var(--muted);margin-top:5px;display:flex;align-items:center;gap:6px}
.case__tag{
  position:absolute;top:14px;left:14px;z-index:2;
  background:rgba(20,28,36,.72);backdrop-filter:blur(6px);color:#fff;
  font-size:.76rem;padding:4px 12px;border-radius:999px;
}

/* ============ 新闻 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s;
}
.news:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.news .date{font-size:.8rem;color:var(--muted);font-variant-numeric:tabular-nums;display:flex;align-items:center;gap:8px}
.news .date::before{content:"";width:22px;height:2px;background:var(--copper);display:inline-block}
.news h3{font-size:1.02rem;font-weight:800;margin:14px 0 8px;line-height:1.55}
.news p{font-size:.88rem;color:var(--muted);flex:1}
.news a.more{margin-top:14px;font-size:.88rem;font-weight:700;color:var(--steel);display:inline-flex;align-items:center;gap:6px}
.news a.more .arr{transition:transform .25s}
.news a.more:hover .arr{transform:translateX(4px)}

/* ============ 服务保障 ============ */
.guarantee{background:linear-gradient(135deg,var(--steel-deep),var(--steel) 55%,#356a86);color:#fff}
.guarantee .sec-head.center .sec-title{color:#fff}
.guarantee .sec-head.center .sec-sub{color:#cfe0ea}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.guard{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius);padding:26px 22px;text-align:center;
  transition:transform .3s var(--ease),background .3s;
}
.guard:hover{transform:translateY(-5px);background:rgba(255,255,255,.13)}
.guard svg{width:44px;height:44px;margin:0 auto 14px;color:var(--copper-soft)}
.guard h3{font-size:1.05rem;font-weight:800}
.guard p{font-size:.85rem;color:#cfe0ea;margin-top:6px}

/* ============ 联系 ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.contact__item{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px dashed var(--dark-line)}
.contact__item .ic{
  width:46px;height:46px;border-radius:12px;background:rgba(224,161,60,.12);
  border:1px solid rgba(224,161,60,.35);display:grid;place-items:center;color:var(--copper-soft);flex-shrink:0;
}
.contact__item h4{font-size:1rem;font-weight:800;color:#eef3f7}
.contact__item p{font-size:.94rem;color:#9db0bf;margin-top:3px}
.contact__item p a:hover{color:var(--copper-soft)}
.call-card{
  background:linear-gradient(135deg,var(--steel-deep),var(--steel) 60%,#356a86);
  border:1px solid var(--dark-line);border-radius:20px;padding:38px 36px;
  display:flex;flex-direction:column;gap:13px;
}
.call-card__ic{width:56px;height:56px;border-radius:14px;background:rgba(224,161,60,.15);border:1px solid rgba(224,161,60,.4);display:grid;place-items:center;color:var(--copper-soft)}
.call-card h3{font-size:1.35rem;font-weight:800;color:#fff}
.call-card .call-card__sub{color:#cfe0ea;font-size:.9rem}
.call-card__tel{font-size:1.6rem;font-weight:900;color:#fff;font-variant-numeric:tabular-nums;line-height:1.3}
.call-card__tel:hover{color:var(--copper-soft)}
.call-card .call-card__row{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.call-card .btn--ghost{border-color:rgba(255,255,255,.35);color:#eaf0f5;background:rgba(255,255,255,.05)}
.call-card .btn--ghost:hover{background:rgba(255,255,255,.12)}

/* ============ 页脚 ============ */
.footer{background:#0d1319;color:#8ea1b0;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:44px}
.footer h4{color:#e6edf2;font-size:.98rem;font-weight:800;margin-bottom:18px}
.footer li{margin-bottom:11px;font-size:.9rem}
.footer li a:hover{color:var(--copper-soft)}
.footer .brand__name{color:#e6edf2}
.footer .brand__name small{color:#72879a}
.footer__about{font-size:.9rem;margin-top:16px;line-height:1.9}
.footer__bottom{border-top:1px solid #1c2733;padding:20px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.84rem;color:#6d8294}
.footer__bottom a:hover{color:var(--copper-soft)}

/* 返回顶部 */
.totop{
  position:fixed;right:26px;bottom:26px;z-index:90;width:50px;height:50px;border-radius:14px;
  background:linear-gradient(135deg,var(--copper),var(--copper-deep));color:#fff;
  display:grid;place-items:center;box-shadow:0 10px 26px rgba(224,161,60,.4);
  opacity:0;transform:translateY(16px);pointer-events:none;transition:.35s var(--ease);
}
.totop.show{opacity:1;transform:none;pointer-events:auto}
.totop:hover{transform:translateY(-3px)}

/* 滚动显现动画 */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media(max-width:1020px){
  .hero .wrap{grid-template-columns:1fr;gap:44px}
  .hero{padding-top:120px}
  .hero__fig{max-width:560px;margin:0 auto}
  .about-grid,.craft-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .prod-grid,.case-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .tl{grid-template-columns:repeat(3,1fr);row-gap:26px}
  .tl::before{display:none}
  .tl li::after{display:none}
  .flow__grid{grid-template-columns:repeat(2,1fr)}
  .guard-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav__links{
    position:fixed;top:0;right:-320px;bottom:0;width:300px;z-index:-1;
    flex-direction:column;background:#101820;padding:90px 24px 30px;gap:6px;
    box-shadow:-20px 0 50px rgba(0,0,0,.4);transition:right .4s var(--ease);
  }
  .nav__links.open{right:0}
  .nav__links a{font-size:1.05rem;padding:13px 16px}
  .nav__burger{display:block;z-index:60}
  .nav__cta{display:none}
}
@media(max-width:620px){
  .sec{padding:64px 0}
  .stats{grid-template-columns:1fr 1fr;gap:16px}
  .prod-grid,.case-grid,.news-grid{grid-template-columns:1fr}
  .tl{grid-template-columns:1fr 1fr}
  .flow__grid{grid-template-columns:1fr}
  .guard-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero__actions .btn{width:100%}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  [data-reveal]{opacity:1;transform:none}
}