/* =========================================================
   洪威智控官网 · 全站样式表
   设计基线（已确认）：浅色底 + 明亮生机绿主色 + 深灰正文
   科技感 2/5 传统稳重 · 实景为主插画点缀 · 图文均衡
   微圆角 / 细线分隔 / 克制动效（仅滚动淡入）
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root{
  /* 生机绿主色阶 */
  --green-800:#123026;
  --green-700:#1A4235;
  --green-600:#1F4E3D;
  --green-500:#2C6A52;
  --green-400:#3D8A6A;
  --green-300:#6FA98F;
  --green-200:#B9CFC5;
  --green-100:#E4EBE7;
  --green-50:#F1F5F3;

  /* 中性色 */
  --ink:#0F172A;
  --ink-2:#475569;
  --ink-3:#64748B;
  --line:#E2E8F0;
  --line-2:#CBD5E1;
  --bg:#FFFFFF;
  --bg-2:#F8FAFC;
  --bg-3:#F1F5F9;

  /* 点缀暖色（仅用于数据高亮与徽标） */
  --accent:#B45309;
  --accent-soft:#FAF6EF;

  --radius-sm:2px;
  --radius:3px;
  --radius-lg:4px;

  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 1px 3px rgba(15,23,42,.06), 0 10px 24px -18px rgba(15,23,42,.20);
  --shadow-lg:0 2px 6px rgba(15,23,42,.07), 0 24px 48px -30px rgba(15,23,42,.24);

  --max:1180px;
  --nav-h:72px;
  --font:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --mono:ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

/* ---------- 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:15px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.32;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
hr{border:0;border-top:1px solid var(--line);margin:0;}
:focus-visible{outline:2px solid var(--green-500);outline-offset:2px;border-radius:4px;}

.skip{position:absolute;left:-9999px;top:0;background:var(--green-600);color:#fff;padding:10px 16px;z-index:200;}
.skip:focus{left:8px;top:8px;}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section.tight{padding:56px 0;}
.section.alt{background:var(--bg-2);}
.section.tint{background:var(--green-50);}

.sec-head{max-width:720px;margin-bottom:44px;}
.sec-head.center{
  margin-left:0;margin-right:0;text-align:left;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;font-weight:700;letter-spacing:.2em;
  color:var(--green-700);padding:0;border-radius:0;margin-bottom:18px;
}
.eyebrow::before{
  content:"";width:24px;height:2px;border-radius:0;background:var(--green-600);
}
.eyebrow::after{
  content:"";width:24px;height:2px;border-radius:0;background:var(--green-600);
}
.sec-head h2{font-size:clamp(24px,3vw,34px);}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:15.5px;}

.lead{font-size:16.5px;color:var(--ink-2);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius);
  font-size:14.5px;font-weight:500;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--green-600);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--green-700);}
.btn-outline{border-color:var(--line-2);color:var(--ink);background:#fff;}
.btn-outline:hover{border-color:var(--green-500);color:var(--green-700);}
.btn-lg{height:50px;padding:0 28px;font-size:15.5px;}
.btn-block{width:100%;}

.arrow-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;color:var(--green-700);
}
.arrow-link svg{transition:transform .2s ease;}
.arrow-link:hover svg{transform:translateX(3px);}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  /* 纯白不透明：原本的 backdrop-filter 在 94% 白底上看不出效果，移动端反而很耗 GPU */
  background:#fff;
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:32px;height:var(--nav-h);}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:2px;flex:0 0 auto;
  background:linear-gradient(145deg,var(--green-500),var(--green-700));
  display:grid;place-items:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{display:inline-block;padding-bottom:5px;font-size:16.5px;font-weight:600;letter-spacing:.01em;}
.brand-text span{font-size:10.5px;color:var(--ink-3);letter-spacing:.16em;text-transform:uppercase;}

.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-menu > a, .nav-menu .has-drop > a{
  display:inline-flex;align-items:center;gap:5px;
  padding:9px 14px;border-radius:var(--radius-sm);
  font-size:14.5px;color:var(--ink-2);
  transition:color .16s ease, background .16s ease;
}
.nav-menu > a:hover, .nav-menu .has-drop > a:hover{color:var(--green-700);background:var(--green-50);}
.nav-menu > a.active, .nav-menu .has-drop > a.active{color:var(--green-700);font-weight:500;}
.nav-menu > a.nav-cta{color:#fff;}
.nav-menu > a.nav-cta:hover{color:#fff;background:var(--green-700);}
.nav-cta{margin-left:12px;height:40px;padding:0 18px;font-size:14px;}

.has-drop{position:relative;}
.has-drop > a .chev{transition:transform .2s ease;}
.has-drop:hover > a .chev{transform:rotate(180deg);}
.drop{
  position:absolute;top:calc(100% + 10px);left:-12px;width:328px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:10px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease, transform .18s ease, visibility .18s;
}
.has-drop:hover .drop, .has-drop:focus-within .drop{opacity:1;visibility:visible;transform:translateY(0);}
.drop a{display:flex;gap:12px;align-items:flex-start;padding:11px 12px;border-radius:var(--radius);transition:background .15s ease;}
.drop a:hover{background:var(--green-50);}
.drop b{display:block;font-size:14px;font-weight:500;}
.drop small{display:block;font-size:12.5px;color:var(--ink-3);line-height:1.5;margin-top:2px;}

/* ---------- 产品中心 · 分类大菜单 ---------- */
.drop.mega{
  width:660px;max-width:calc(100vw - 48px);
  left:auto;right:0;padding:0;
  display:flex;overflow:hidden;
}
.mega-side{
  flex:0 0 192px;background:var(--bg-2);border-right:1px solid var(--line);
  padding:12px;display:flex;flex-direction:column;gap:3px;
}
.mega-cat{
  display:flex;align-items:center;gap:10px;width:100%;
  padding:10px 12px;border:1px solid transparent;border-radius:var(--radius);
  background:transparent;text-align:left;cursor:pointer;color:var(--ink-2);
  font:inherit;transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.mega-cat:hover{background:#fff;border-color:var(--line);}
.mega-cat.is-on{background:#fff;border-color:var(--green-200);color:var(--green-700);box-shadow:var(--shadow-sm);}
.mega-cat-ic{
  width:30px;height:30px;border-radius:0;flex:0 0 auto;
  background:none;display:grid;place-items:center;color:var(--ink-2);
  transition:color .16s ease;
}
.mega-cat.is-on .mega-cat-ic{
  background:none;color:var(--green-700);
}
.mega-cat-tx{display:flex;flex-direction:column;line-height:1.28;min-width:0;}
.drop.mega .mega-cat-tx b{font-size:14px;font-weight:500;display:block;}
.drop.mega .mega-cat-tx small{font-size:11.5px;color:var(--ink-3);margin-top:0;}
.mega-arrow{margin-left:auto;flex:0 0 auto;opacity:0;transition:opacity .16s ease,transform .16s ease;}
.mega-cat.is-on .mega-arrow{opacity:1;transform:translateX(2px);}

.mega-main{flex:1;min-width:0;min-height:250px;padding:16px 18px 14px;display:flex;flex-direction:column;}
.mega-panel{display:none;}
.mega-panel.is-on{display:block;}
.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;}

.drop.mega .mega-item{
  display:flex;flex-direction:column;align-items:flex-start;gap:9px;
  padding:14px;border:1px solid transparent;border-radius:var(--radius);
  transition:background .16s ease,border-color .16s ease;
}
.drop.mega .mega-item:hover{background:var(--green-50);border-color:var(--green-200);}
.mega-item-ic{
  width:40px;height:40px;border-radius:0;flex:0 0 auto;
  background:none;color:var(--green-700);display:grid;place-items:center;
}
.drop.mega .mega-item b{font-size:13.5px;font-weight:500;color:var(--ink);line-height:1.4;}
.drop.mega .mega-item small{font-size:12px;color:var(--ink-3);margin-top:0;}
.mega-item-tx{display:flex;flex-direction:column;gap:3px;min-width:0;}

.mega-note{
  background:var(--bg-2);border:1px dashed var(--line-2);border-radius:var(--radius);
  padding:14px;display:flex;flex-direction:column;justify-content:center;gap:6px;
}
.drop.mega .mega-note b{display:block;font-size:13px;font-weight:500;color:var(--ink-2);}
.drop.mega .mega-note small{display:block;font-size:12px;color:var(--ink-3);line-height:1.65;margin-top:0;}

.mega-foot{
  margin-top:auto;padding-top:13px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:13px;
}
.drop.mega .mega-all{display:inline-flex;align-items:center;gap:6px;padding:0;font-weight:500;color:var(--green-700);}
.drop.mega .mega-all svg{transition:transform .2s ease;}
.drop.mega .mega-all:hover{background:transparent;}
.drop.mega .mega-all:hover svg{transform:translateX(3px);}
.mega-hint{color:var(--ink-3);font-size:12.5px;}
.drop.mega .mega-hint a{display:inline;padding:0;color:var(--green-700);}
.drop.mega .mega-hint a:hover{background:transparent;color:var(--green-800);}

.nav-toggle{
  display:none;width:36px;height:36px;margin-left:auto;
  background:#fff;border:1px solid var(--line);border-radius:2px;
  cursor:pointer;padding:8px;
}
.nav-toggle span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease, opacity .2s ease;}
.nav-toggle span + span{margin-top:5px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 全幅轮播首屏 ---------- */
.hero-carousel{
  position:relative;overflow:hidden;background:var(--green-800);
  /* 上拉铺到导航之下；额外的 1px 抵消 .nav 的底边框 */
  margin-top:calc(-1 * var(--nav-h) - 1px);
  height:clamp(480px, 76vh, 720px);
}
.hc-slide{position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity .9s ease, visibility .9s ease;}
.hc-slide.is-active{opacity:1;visibility:visible;}
.hc-slide > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.hc-slide::after{content:"";position:absolute;inset:0;   /* 遮罩，保证白字对比度 */
  background:linear-gradient(180deg,rgba(2,6,23,.52) 0%,rgba(2,6,23,.26) 40%,rgba(2,6,23,.60) 100%);}
.hc-body{position:relative;z-index:2;height:100%;display:flex;align-items:center;
  padding-top:var(--nav-h);}
.hc-body .container{width:100%;text-align:left;}
.hc-title{
  margin:0;color:#fff;font-weight:600;line-height:1.22;letter-spacing:-.02em;
  font-size:clamp(30px,4.4vw,54px);text-shadow:0 1px 14px rgba(2,6,23,.3);
}
.hc-sub{margin:18px 0 0;max-width:560px;color:rgba(255,255,255,.93);
  font-size:clamp(15px,1.5vw,18px);line-height:1.6;text-shadow:0 1px 12px rgba(0,0,0,.3);}
.hc-btn{
  display:inline-flex;align-items:center;gap:10px;margin-top:30px;
  height:50px;padding:0 30px;border-radius:3px;
  background:#fff;border:1px solid #fff;
  color:var(--green-800);font-size:15px;font-weight:600;
  transition:background .2s ease, border-color .2s ease;
}
.hc-btn:hover{
  background:#EEF2F1;border-color:#EEF2F1;transform:none;
}

/* 左右箭头 */
/* 左右各一整块竖条热区（贯穿首屏高度），鼠标进入即出现圆形箭头，点整块都能翻页 */
.hc-arrow{position:absolute;top:0;bottom:0;z-index:3;
  width:clamp(88px, 11vw, 160px);
  padding:0;background:none;border:0;
  display:grid;place-items:center;cursor:pointer;
  -webkit-tap-highlight-color:transparent;}
/* 圆形箭头本体：默认透明，进入热区后淡入 */
.hc-arrow svg{width:22px;height:22px;padding:11px;box-sizing:content-box;
  border-radius:0;
  background:rgba(2,6,23,.42);border:1px solid rgba(255,255,255,.5);
  
  color:#fff;opacity:0;
  transition:opacity .25s ease, background .2s ease, transform .2s ease;}
.hc-arrow:hover svg,
.hc-arrow:focus-visible svg,
.hero-carousel:has(.hc-arrow:focus-visible) .hc-arrow svg{opacity:1;}
.hc-arrow:hover svg{background:rgba(255,255,255,.32);transform:none;}
.hc-arrow:active svg{transform:scale(.94);}
.hc-prev{left:0;}
.hc-next{right:0;}

/* 指示点 */
.hc-dots{position:absolute;left:0;right:0;bottom:26px;z-index:3;
  display:flex;justify-content:center;gap:7px;}
.hc-dots button{width:22px;height:2px;padding:0;border:0;border-radius:0;
  background:rgba(255,255,255,.42);cursor:pointer;
  transition:background .2s ease, width .28s ease;}
.hc-dots button:hover{background:rgba(255,255,255,.75);}
.hc-dots button[aria-selected="true"]{background:#fff;width:40px;border-radius:0;}

/* ---------- 导航叠在首屏上（仅首页 body.nav-over） ---------- */
.nav-over .nav{background:transparent;border-bottom-color:transparent;
  -webkit-backdrop-filter:none;backdrop-filter:none;
  transition:background .3s ease, border-color .3s ease;}
.nav-over .nav .brand-text b{color:#fff;}
.nav-over .nav .brand-text span{color:rgba(255,255,255,.68);}
.nav-over .nav .brand-mark{background:rgba(255,255,255,.2);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.42);}
.nav-over .nav-menu > a,
.nav-over .nav-menu .has-drop > a{color:rgba(255,255,255,.92);}
.nav-over .nav-menu > a:hover,
.nav-over .nav-menu .has-drop > a:hover{color:#fff;background:rgba(255,255,255,.15);}
.nav-over .nav-menu > a.active,
.nav-over .nav-menu .has-drop > a.active{color:#fff;}
.nav-over .nav-menu > a.nav-cta{color:#fff;}
.nav-over .nav-menu > a.nav-cta:hover{background:var(--green-700);color:#fff;}
.nav-over .nav-toggle{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.42);}
.nav-over .nav-toggle span{background:#fff;}
/* 滚过首屏后恢复白底 */
.nav-over .nav.is-scrolled{background:#fff;border-bottom-color:var(--line);}
.nav-over .nav.is-scrolled .brand-text b{color:var(--ink);}
.nav-over .nav.is-scrolled .brand-text span{color:var(--ink-3);}
.nav-over .nav.is-scrolled .brand-mark{
  background:linear-gradient(145deg,var(--green-500),var(--green-700));box-shadow:none;}
.nav-over .nav.is-scrolled .nav-menu > a,
.nav-over .nav.is-scrolled .nav-menu .has-drop > a{color:var(--ink-2);}
.nav-over .nav.is-scrolled .nav-menu > a:hover,
.nav-over .nav.is-scrolled .nav-menu .has-drop > a:hover{color:var(--green-700);background:var(--green-50);}
.nav-over .nav.is-scrolled .nav-menu > a.active,
.nav-over .nav.is-scrolled .nav-menu .has-drop > a.active{color:var(--green-700);}
.nav-over .nav.is-scrolled .nav-menu > a.nav-cta{color:#fff;}
.nav-over .nav.is-scrolled .nav-menu > a.nav-cta:hover{background:var(--green-700);color:#fff;}
.nav-over .nav.is-scrolled .nav-toggle{background:#fff;border-color:var(--line);}
.nav-over .nav.is-scrolled .nav-toggle span{background:var(--ink);}

/* 无脚本时隐藏轮播控件（首屏仍显示第 1 张） */
.no-js .hc-arrow,.no-js .hc-dots,
.no-anim .hc-arrow,.no-anim .hc-dots{display:none;}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}

/* ---------- 首屏下方能力事实条 ---------- */
.facts-band{background:#fff;border-bottom:1px solid var(--line);}
.facts-band ul{list-style:none;margin:0;padding:0;display:flex;}
.facts-band li{flex:1 1 0;min-width:0;position:relative;padding:24px 28px;border-left:1px solid var(--line);
  transition:background .25s ease;}
.facts-band li:first-child{border-left:0;padding-left:16px;}
.facts-band li:last-child{padding-right:0;}
/* 悬停：绿色竖线从分隔线处滑入 */
.facts-band li::before{content:"";position:absolute;left:-1px;top:22px;bottom:22px;width:0;
  background:var(--green-600);border-radius:2px;
  transition:width .28s cubic-bezier(.22,.61,.36,1);}
.facts-band li:first-child::before{left:0;}
.facts-band b{display:block;font-size:17px;font-weight:600;color:var(--ink);letter-spacing:-.01em;
  transition:color .25s ease, transform .28s cubic-bezier(.22,.61,.36,1);}
.facts-band span{display:block;margin-top:4px;font-size:12.5px;color:var(--ink-3);
  transition:color .25s ease;}
.facts-band li:hover{
  background:none;
}
.facts-band li:hover::before{width:3px;}
.facts-band li:hover b{
  color:var(--green-700);transform:none;
}
.facts-band li:hover span{color:var(--ink-2);}

/* ---------- 卡片通用 ---------- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.card:hover{
  border-color:var(--line-2);box-shadow:var(--shadow-sm);transform:none;
}
.card-body{padding:22px 22px 24px;}

.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

/* ---------- 产品卡片 ---------- */
.p-card{display:flex;flex-direction:column;height:100%;position:relative;}
/* 整卡可点：查看详情链接的热区拉伸覆盖整卡 */
.p-card .arrow-link::after{content:"";position:absolute;inset:0;}
.p-card:has(.arrow-link:focus-visible){border-color:var(--green-600);box-shadow:var(--shadow);}
.p-card .thumb{background:var(--bg-2);aspect-ratio:4/3;display:grid;place-items:center;overflow:hidden;border-bottom:1px solid var(--line);}
.p-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.p-card:hover .thumb img{transform:scale(1.04);}
.p-card .card-body{display:flex;flex-direction:column;flex:1;gap:10px;}
.p-tag{
  align-self:flex-start;font-size:11.5px;font-weight:500;letter-spacing:.06em;
  color:var(--ink-2);background:none;border:1px solid var(--line-2);
  padding:3px 8px;border-radius:2px;
}
.p-card h3{font-size:17px;}
.p-card p{font-size:13.5px;color:var(--ink-2);flex:1;}
.spec-mini{display:flex;flex-wrap:wrap;gap:6px;padding-top:2px;}
.spec-mini span{
  font-size:12px;color:var(--ink-2);background:var(--bg-3);
  border:1px solid var(--line);border-radius:5px;padding:3px 8px;
}
.p-card .card-foot{padding-top:6px;border-top:1px solid var(--line);margin-top:4px;display:flex;align-items:center;justify-content:space-between;}

/* ---------- 痛点 / 特性 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px; /*align-items:center;*/}
.pain{
  border:1px solid var(--line);border-radius:var(--radius);padding:20px;
  display:flex;gap:16px;align-items:flex-start;background:#fff;
}
/* .pain 的相邻间距只用于「纵向堆叠」；站内 .pain 都在栅格里，间距应交给 gap */
.pain + .pain{margin-top:12px;}
.grid .pain + .pain{margin-top:0;}
.pain .icon{
  width:44px;height:44px;border-radius:0;flex:0 0 auto;
  display:grid;place-items:center;background:none;color:var(--ink-3);
}
.pain.solved .icon{
  background:none;color:var(--green-700);
}
.pain h3{font-size:15px;margin-bottom:4px;}
.pain p{font-size:13.5px;color:var(--ink-2);}

.feat{display:flex;padding:20px;gap:16px;align-items:flex-start;}
.feat .icon{
  width:46px;height:46px;border-radius:0;flex:0 0 auto;
  background:none;color:var(--green-700);display:grid;place-items:center;
}
.feat h3{font-size:15.5px;margin-bottom:6px;}
.feat p{font-size:13.5px;color:var(--ink-2);}

/* ---------- 场景 ---------- */
.scene{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);}
.scene img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .5s ease;}
.scene:hover img{transform:scale(1.05);}
.scene-cap{
  position:absolute;left:0;right:0;bottom:0;padding:26px 20px 16px;
  background:linear-gradient(to top,rgba(12,32,20,.82),rgba(12,32,20,0));
  color:#fff;
}
.scene-cap b{display:block;font-size:16px;font-weight:600;}
.scene-cap small{font-size:12.5px;color:rgba(255,255,255,.78);}

/* ---------- 流程步骤 ---------- */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.step{position:relative;padding-top:26px;border-top:2px solid var(--line);}
.step::before{
  counter-increment:step;content:"0" counter(step);
  position:absolute;top:-2px;left:0;transform:translateY(-50%);
  background:var(--green-600);color:#fff;font-size:12px;font-weight:600;
  padding:3px 9px;border-radius:5px;
}
.step h3{font-size:15.5px;margin-bottom:8px;}
.step p{font-size:13.5px;color:var(--ink-2);}

/* ---------- 筛选 ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;}
.chip{
  padding:8px 16px;border:1px solid var(--line-2);border-radius:2px;
  background:#fff;font-size:13.5px;color:var(--ink-2);cursor:pointer;
  transition:all .18s ease;
}
.chip:hover{border-color:var(--green-400);color:var(--green-700);}
.chip.on{background:var(--green-600);border-color:var(--green-600);color:#fff;}
.empty{padding:56px 0;text-align:center;color:var(--ink-3);font-size:14px;}

/* ---------- 内页 Hero ---------- */
.page-hero{background:var(--bg-2);border-bottom:1px solid var(--line);padding:32px 0 48px;}
.page-hero.tint{background:var(--green-50);}
.page-hero h1{font-size:clamp(26px,3.4vw,40px);}
.page-hero p{margin-top:16px;max-width:640px;color:var(--ink-2);font-size:16px;}
.page-hero .hero-actions{margin-top:26px;}

.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a:hover{color:var(--green-700);}
.breadcrumb span.sep{color:var(--line-2);}

/* ---------- 产品详情 ---------- */
.pd{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.pd-media{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;}
.pd-media img{width:100%;aspect-ratio:1/1;object-fit:cover;}
.pd-info .p-tag{margin-bottom:14px;}
.pd-info h1{font-size:clamp(26px,3.2vw,36px);}
.pd-info .lead{margin-top:16px;font-size:15.5px;}
.pd-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0;}
.pd-hl{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.pd-hl div{background:#fff;padding:14px 16px;}
.pd-hl small{display:block;font-size:12px;color:var(--ink-3);}
.pd-hl b{font-size:15px;font-weight:500;}

.table-wrap{border:1px solid var(--line);border-radius:var(--radius-lg);overflow-x:auto;-webkit-overflow-scrolling:touch;}
table.spec{width:100%;border-collapse:collapse;font-size:14px;}
table.spec.compare{min-width:820px;table-layout:fixed;}
table.spec.compare thead th:first-child,table.spec.compare tbody th{width:16%;}
table.spec.compare th,table.spec.compare td{word-wrap:break-word;}
table.spec caption{text-align:left;padding:18px 20px;font-weight:600;font-size:15px;background:var(--bg-2);border-bottom:1px solid var(--line);}
table.spec th,table.spec td{padding:13px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0;}
table.spec:not(.compare) th{width:38%;font-weight:400;color:var(--ink-2);background:var(--bg-2);}
table.spec td{font-weight:500;}
table.spec tbody tr:hover th,table.spec tbody tr:hover td{background:var(--green-50);}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:28px;}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--line-2);}
.tl-item{position:relative;padding-bottom:32px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-28px;top:7px;width:11px;height:11px;border-radius:0;
  background:#fff;border:2px solid var(--green-500);
}
.tl-item time{font-size:13px;font-weight:600;color:var(--green-700);letter-spacing:.02em;}
.tl-item h3{font-size:15.5px;margin:6px 0 6px;}
.tl-item p{font-size:13.5px;color:var(--ink-2);max-width:640px;}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:32px;align-items:start;}
.ct-item{display:flex;gap:14px;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;}
.ct-item + .ct-item{margin-top:12px;}
.ct-item .icon{
  width:42px;height:42px;border-radius:0;flex:0 0 auto;
  background:none;color:var(--green-700);display:grid;place-items:center;
}
.ct-item small{display:block;font-size:12.5px;color:var(--ink-3);}
.ct-item b{font-size:15px;font-weight:500;}

.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;font-weight:500;margin-bottom:7px;}
.field label i{font-style:normal;color:#C0392B;}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;font:inherit;font-size:14px;color:var(--ink);
  background:#fff;border:1px solid var(--line-2);border-radius:var(--radius);
  transition:border-color .16s ease, box-shadow .16s ease;
}
.field textarea{min-height:118px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--green-500);box-shadow:0 0 0 3px var(--green-100);
}
.field .err{display:none;font-size:12.5px;color:#C0392B;margin-top:5px;}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#E0A0A0;}
.field.invalid .err{display:block;}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:14px;}
.form-ok{
  display:none;align-items:center;gap:10px;background:var(--green-50);
  border:1px solid var(--green-200);color:var(--green-800);
  border-radius:var(--radius);padding:13px 16px;font-size:14px;margin-bottom:18px;
}
.form-ok.show{display:flex;}
.form-err{
  display:none;align-items:center;gap:10px;background:#FBEDEB;
  border:1px solid #EAC8C3;color:#8C2F23;
  border-radius:var(--radius);padding:13px 16px;font-size:14px;margin-bottom:18px;
}
.form-err.show{display:flex;}
/* honeypot 蜜罐：移出视口而非 display:none，避免被部分机器人识别跳过 */
.hp-input{position:absolute !important;left:-9000px !important;top:auto !important;width:1px;height:1px;opacity:0;border:0;padding:0;}
/* 联系方式：类型下拉 + 值输入框 横排 */
.contact-row{display:flex;gap:10px;}
.contact-row select{flex:0 0 108px;width:auto;padding-left:10px;padding-right:26px;}
.contact-row input{flex:1;min-width:0;}
@media (max-width:640px){
  .contact-row{gap:8px;}
  .contact-row select{flex:0 0 96px;}
}

/* ---------- 公司地址（联系页：位置示意图 + 地址条） ---------- */
.map-figure{margin:0 auto;max-width:640px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;}
.map-figure .map-img{display:block;width:100%;height:auto;}
.map-cap{display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:20px 24px;border-top:1px solid var(--line);}
.addr-ic{
  width:46px;height:46px;flex:0 0 auto;border-radius:0;
  background:none;color:var(--green-700);display:grid;place-items:center;
}
.addr-tx{flex:1 1 280px;min-width:0;}
.addr-tx h2{font-size:18px;margin-bottom:6px;}
.addr-tx p{margin:0;font-size:14px;color:var(--ink-2);}
.addr-tx p.small{margin-top:5px;}
.map-cap .btn{flex:0 0 auto;}

/* ---------- FAQ ---------- */
.faq{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:#fff;}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:18px 22px;background:#fff;border:0;cursor:pointer;text-align:left;
  font-size:15px;font-weight:500;transition:background .16s ease;
}
.faq-q:hover{background:var(--green-50);}
.faq-q .pm{
  flex:0 0 auto;width:22px;height:22px;border-radius:2px;
  border:1px solid var(--line-2);background:none;
  display:grid;place-items:center;color:var(--ink-2);font-size:15px;line-height:1;
}
.faq-item.open .faq-q .pm{
  background:none;border-color:var(--green-600);color:var(--green-700);
}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a p{padding:0 22px 20px;font-size:14px;color:var(--ink-2);max-width:820px;}

/* ---------- CTA 区块 ---------- */
.cta-band{background:var(--green-700);color:#fff;border-radius:var(--radius-lg);padding:52px 56px;position:relative;overflow:hidden;}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);color:#fff;position:relative;}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.78);max-width:560px;position:relative;}
.cta-band .hero-actions{position:relative;}
.cta-band .btn-primary{background:#fff;color:var(--green-700);}
.cta-band .btn-primary:hover{background:var(--green-50);}
.cta-band .btn-outline{background:transparent;border-color:rgba(255,255,255,.4);color:#fff;}
.cta-band .btn-outline:hover{border-color:#fff;color:#fff;}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:88px;}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-about{margin-top:18px;font-size:13.5px;line-height:1.8;max-width:320px;color:rgba(255,255,255,.6);}
.footer .brand-text b{color:#fff;}
.footer .brand-text span{color:rgba(255,255,255,.42);}
.footer h3{color:#fff;font-size:13.5px;margin-bottom:16px;}
.footer li{margin-bottom:10px;}
.footer li a{font-size:13.5px;color:rgba(255,255,255,.66);transition:color .16s ease;}
.footer li a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.45);
}
.footer-bottom a:hover{color:rgba(255,255,255,.8);}

/* ---------- 悬浮工具条 ---------- */
.float-bar{
  position:fixed;right:20px;bottom:28px;z-index:90;
  display:flex;flex-direction:column;gap:8px;
}
.float-bar button,.float-bar a{
  width:46px;height:46px;border-radius:2px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow);
  display:grid;place-items:center;color:var(--ink-2);cursor:pointer;
  transition:all .18s ease;position:relative;
}
.float-bar button:hover,.float-bar a:hover{color:var(--green-700);border-color:var(--green-300);}
.float-bar .tip{
  position:absolute;right:calc(100% + 10px);top:50%;transform:translateY(-50%);
  background:var(--ink);color:#fff;font-size:12.5px;padding:6px 11px;border-radius:2px;
  white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .16s ease;
}
.float-bar button:hover .tip,.float-bar a:hover .tip{opacity:1;}
#toTop{opacity:0;visibility:hidden;}
#toTop.show{opacity:1;visibility:visible;}

/* ---------- 滚动淡入（克制动效）
   降级策略：默认可见；仅当 <html> 拿到 .js（内联脚本执行成功）才隐藏等待淡入。
   .no-js = 脚本被禁用；.no-anim = main.js 未能就绪（3.5s 兜底）。两者都强制可见。 ---------- */
.reveal{transition:opacity .65s cubic-bezier(.22,.61,.36,1), transform .65s cubic-bezier(.22,.61,.36,1);}
.js .reveal{opacity:0;transform:translateY(18px);}
.js .reveal.in{opacity:1;transform:none;}

.no-js .reveal,.no-anim .reveal{opacity:1 !important;transform:none !important;}
.no-js .mega-side,.no-anim .mega-side{display:none;}
.no-js .mega-panel,.no-anim .mega-panel{display:block;}

@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1 !important;transform:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;}
}

.mt-8{margin-top:8px;}
.mt-16{margin-top:16px;}
.mt-24{margin-top:24px;}
.mt-32{margin-top:32px;}
.center{text-align:center;}
.muted{color:var(--ink-2);}
.small{font-size:13px;}
.badge-soft{
  display:inline-block;font-size:11.5px;color:var(--ink-2);
  background:none;border:1px solid var(--line-2);border-radius:2px;padding:3px 8px;
}
.note-box{
  border:1px dashed var(--line-2);border-radius:var(--radius);
  padding:16px 20px;font-size:13px;color:var(--ink-2);background:var(--bg-2);
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero-carousel{height:clamp(440px, 70vh, 620px);}
  .hc-prev,.hc-next{width:clamp(72px, 14vw, 120px);}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:900px){
  .nav-menu{position:fixed;inset:var(--nav-h) 0 auto 0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;
    padding:0 20px;
    max-height:0;overflow:hidden;
    /* 只动 opacity/transform（合成层），高度瞬时切换 —— max-height 过渡会每帧重排，移动端明显掉帧 */
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .18s ease, transform .18s ease, visibility .18s ease;}
  .nav-menu.open{max-height:80vh;overflow-y:auto;
    padding:12px 20px 20px;border-bottom:1px solid var(--line);
    opacity:1;visibility:visible;transform:translateY(0);}
  .nav-menu > a,.nav-menu .has-drop > a{padding:14px 8px;font-size:15.5px;}
  /* 下拉在窄屏默认收起，点击「产品中心」才展开 */
  .has-drop .drop{
    position:static;width:auto;transform:none;
    box-shadow:none;border:0;border-radius:0;margin:0;padding:0;
    max-height:0;overflow:hidden;
    /* 同菜单：只淡入，不做 max-height 布局动画 */
    opacity:0;visibility:hidden;
    transition:opacity .18s ease, visibility .18s ease;
  }
  .has-drop.is-open .drop{max-height:none;opacity:1;visibility:visible;}
  /* 窄屏箭头只由点击控制：先清掉 hover/focus 的翻转，再由 is-open 翻转 */
  .has-drop:hover > a .chev,.has-drop:focus-within > a .chev{transform:none;}
  .has-drop.is-open > a .chev{transform:rotate(180deg);}
  .no-js .has-drop .drop,.no-anim .has-drop .drop{max-height:none;}
  .no-js .nav-menu,.no-anim .nav-menu{max-height:none;overflow:visible;opacity:1;visibility:visible;transform:none;}
  .no-js .nav-toggle,.no-anim .nav-toggle{display:none;}

  .drop.mega{display:block;max-width:none;border-left:0;margin-left:0;padding-left:0;}
  .mega-side{
    flex-direction:row;background:transparent;border-right:0;
    border-bottom:1px solid var(--line);padding:0 0 10px;gap:8px;margin-bottom:10px;
  }
  .mega-cat{flex:1;justify-content:center;padding:9px 10px;}
  .drop.mega .mega-cat-tx small{display:none;}
  .mega-arrow{display:none;}
  .mega-main{min-height:0;padding:0;}
  .mega-grid{grid-template-columns:1fr;}
  .drop.mega .mega-item{flex-direction:row;align-items:center;gap:12px;padding:11px 8px;}
  .mega-foot{flex-direction:column;align-items:flex-start;gap:6px;margin-top:12px;}
  .nav-cta{margin:10px 0 0;width:100%;}
  .nav-toggle{display:block;}

  .hero-carousel{height:clamp(430px, 68vh, 560px);}
  .hc-title{font-size:clamp(26px,7.2vw,38px);}
  .hc-sub{font-size:15px;margin-top:14px;}
  .hc-btn{height:46px;padding:0 24px;font-size:14.5px;margin-top:24px;}
  .hc-arrow{display:none;}
  .facts-band ul{flex-wrap:wrap;}
  .facts-band li{flex:1 1 46%;padding:18px 16px;}
  .facts-band li:nth-child(odd){border-left:0;padding-left:16px;}
  .facts-band li:nth-child(3),.facts-band li:nth-child(4){border-top:1px solid var(--line);}
  .split,.pd,.contact-grid{grid-template-columns:1fr;gap:36px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}

  /* 菜单展开时底色恒为白，链接一律用深色（覆盖 nav-over 的透明白字） */
  .nav-menu.open > a,
  .nav-menu.open .has-drop > a,
  .nav-over .nav-menu.open > a,
  .nav-over .nav-menu.open .has-drop > a,
  .nav-over .nav-menu.open .has-drop > a.active{color:var(--ink-2);}
  .nav-menu.open > a.active,
  .nav-menu.open .has-drop > a.active,
  .nav-over .nav-menu.open > a.active{color:var(--green-700);}
  .nav-menu.open > a.nav-cta,
  .nav-over .nav-menu.open > a.nav-cta{color:#fff;background:var(--green-600);}
  .nav-menu.open > a:hover,
  .nav-menu.open .has-drop > a:hover,
  .nav-over .nav-menu.open > a:hover,
  .nav-over .nav-menu.open .has-drop > a:hover{color:var(--green-700);background:var(--green-50);}
}
@media (max-width:640px){
  .hc-dots{bottom:18px;}
  .facts-band li{padding:16px 14px;}
  .facts-band b{font-size:15.5px;}
  body{font-size:14.5px;}
  .section{padding:24px 0;}
  .section.tight{padding:24px 0;}
  .container{padding:0 18px;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  /* 产品卡（.grid-4）窄屏也保持一行两个，同步收紧卡片内尺寸 */
  .grid-4{grid-template-columns:repeat(2,1fr);gap:12px;}
  .card-body{padding:14px;}
  .p-card .card-body{padding:14px;gap:8px;}
  .p-card h3{font-size:15px;line-height:1.35;}
  .p-card p{font-size:12.5px;line-height:1.55;}
  .p-tag{font-size:10.5px;padding:2px 7px;}
  .spec-mini{gap:4px;}
  .spec-mini span{font-size:10.5px;padding:2px 6px;border-radius:2px;}
  .p-card .card-foot{padding-top:5px;margin-top:2px;}
  .arrow-link{font-size:13px;}
  .steps{grid-template-columns:1fr;gap:24px;}
  .pd-hl{grid-template-columns:1fr;}
  .cta-band{padding:36px 24px;}
  .form{padding:20px;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .float-bar{right:14px;bottom:18px;}
  .float-bar .tip{display:none;}
  .pain{padding:12px;gap:4px;}
  .feat{padding:12px;gap:4px;}
  table.spec:not(.compare) th,table.spec:not(.compare) td{padding:11px 14px;font-size:13.5px;}
}

/* ---------- 打印 ---------- */
@media print{
  .nav,.float-bar,.cta-band,.footer{display:none;}
  .reveal{opacity:1;transform:none;}
}