:root{
  --ink:#0c0d0f;
  --ink-2:#15171a;
  --ink-3:#1f2226;
  --paper:#ffffff;
  --paper-2:#f6f7f8;
  --paper-3:#edeff1;
  --line:#e3e5e8;
  --line-dark:rgba(255,255,255,.09);
  --txt:#1b1e22;
  --txt-2:#4d545c;
  --txt-3:#8b929b;
  --txt-l:#f8f9fa;
  --txt-l2:#b9c0c7;
  --accent:#ff4d00;
  --accent-2:#e04400;
  --accent-soft:#fff0e9;
  --radius:14px;
  --radius-lg:24px;
  --shadow:0 20px 55px rgba(12,13,15,.10);
  --shadow-lg:0 30px 80px rgba(12,13,15,.16);
  --font:'Source Han Sans SC','Noto Sans SC','Alibaba PuHuiTi','PingFang SC','Hiragino Sans GB',sans-serif;
  --maxw:1240px;
  --header-h:76px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  color:var(--txt);
  background:var(--paper);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:var(--accent);color:#fff}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:100px 0;position:relative}
.section.tight{padding:72px 0}
.bg-paper{background:var(--paper)}
.bg-gray{background:var(--paper-2)}
.bg-dark{background:var(--ink);color:var(--txt-l)}
.bg-dark .sec-title{color:#fff}

/* ---------- 章节标题（编辑部风格：圆点序号 + 荧光笔式关键词） ---------- */
.sec-head{max-width:980px;margin-bottom:52px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:13px;font-weight:700;letter-spacing:.3em;
  color:var(--accent);
}
.eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px rgba(255,77,0,.13)}
.sec-head.center .eyebrow::after{content:"";width:34px;height:1px;background:rgba(255,77,0,.4)}
.sec-title{
  position:relative;z-index:0;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.32;font-weight:800;letter-spacing:.015em;
  margin:20px 0 18px;color:var(--txt);
}
.bg-dark .sec-title{color:#fff}
.sec-sub{font-size:16px;color:var(--txt-2);max-width:760px;line-height:1.9}
.sec-head.center .sec-sub{margin:0 auto}
.bg-dark .sec-sub{color:var(--txt-l2)}
.sec-title .hl{color:inherit;position:relative}
.sec-title .hl::after{
  content:"";position:absolute;left:-5px;right:-5px;bottom:.05em;height:.42em;z-index:-1;
  background:linear-gradient(90deg,rgba(255,77,0,.40),rgba(255,77,0,.14));
  border-radius:3px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 34px;border-radius:999px;
  font-size:16px;font-weight:600;line-height:1;
  background:var(--ink);color:#fff;
  transition:transform .3s ease,background .3s ease,box-shadow .3s ease,border-color .3s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(12,13,15,.28);background:#000}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-2);box-shadow:0 14px 36px rgba(255,77,0,.38)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-line{background:transparent;color:var(--txt);border-color:var(--line);}
.btn-line:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn .arr{transition:transform .3s ease}
.btn:hover .arr{transform:translateX(5px)}
.btn-sm{padding:11px 22px;font-size:14px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  display:flex;align-items:center;
  transition:background .35s ease,box-shadow .35s ease,height .35s ease;
  color:#fff;
}
.site-header.on{
  background:rgba(12,13,15,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line-dark),0 12px 40px rgba(12,13,15,.25);
  height:64px;
}
.header-in{display:flex;align-items:center;gap:28px;width:100%}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand .logo{height:34px;width:auto;filter:drop-shadow(0 1px 2px rgba(0,0,0,.4))}
.brand-text{font-weight:700;font-size:19px;letter-spacing:.08em;color:#fff;line-height:1.2}
.brand-text small{display:block;font-size:10px;font-weight:500;letter-spacing:.3em;color:var(--txt-l2);margin-top:2px}
.main-nav{display:flex;align-items:center;gap:6px;margin:0 auto}
.main-nav a{
  position:relative;padding:10px 16px;font-size:16px;font-weight:500;
  color:rgba(255,255,255,.86);border-radius:8px;
  transition:color .25s ease,background .25s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:5px;height:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.main-nav a:hover{color:#fff}
.main-nav a.active{color:#fff}
.main-nav a.active::after,.main-nav a:hover::after{transform:scaleX(1)}
.header-tel{display:flex;align-items:center;gap:9px;color:#fff;font-weight:600;font-size:16px;letter-spacing:.02em}
.header-tel svg{color:var(--accent)}
.header-cta{margin-left:6px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;position:relative;z-index:120}
.nav-toggle span{position:absolute;left:11px;right:11px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
.nav-toggle.open span:nth-child(1){top:21px;transform:rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){top:21px;transform:rotate(-45deg)}

/* 移动端抽屉 */
.mobile-nav{
  position:fixed;inset:0;z-index:110;background:rgba(8,9,10,.97);
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px;
  opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s ease;
}
.mobile-nav.open{opacity:1;visibility:visible}
.mobile-nav a{
  font-size:26px;font-weight:600;color:#fff;padding:12px 24px;
  opacity:0;transform:translateY(18px);transition:.4s ease;
}
.mobile-nav.open a{opacity:1;transform:none}
.mobile-nav a.active{color:var(--accent)}
.mobile-nav .m-tel{font-size:18px;color:var(--txt-l2);margin-top:18px;font-weight:600}

/* ---------- 滚动进度条 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--accent),#ff8a3d);
  z-index:200;transition:width .1s linear;
}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:stretch;
  background:var(--ink);color:#fff;overflow:hidden;
}
.hero-slides{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease;overflow:hidden;background-size:100% auto;background-position:center center;background-repeat:no-repeat;pointer-events:none}
.hero-slide.active{opacity:1;pointer-events:auto}
.hero-slide.hs1{background-image:url("../images/hero-bg-1-new.png")}
.hero-slide.hs2{background-image:url("../images/hero-bg-2-new.png")}
.hero-slide.hs3{background-image:url("../images/hero-bg-3-new.png")}
/* BANNER 文字层（网页文字效果） */
.slide-content{
  position:absolute;inset:0;z-index:1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:0 32px;pointer-events:none;
}
.slide-tag{
  margin:0 0 34px;font-size:clamp(16px,1.3vw,24px);font-weight:700;letter-spacing:.32em;
  color:var(--accent);
}
.slide-main{
  margin:0 0 34px;font-size:clamp(42px,4.6vw,80px);font-weight:900;line-height:1.14;color:#fff;
  letter-spacing:.01em;text-shadow:0 2px 26px rgba(0,0,0,.5);
}
.slide-main .accent{color:var(--accent)}
.slide-main.lg{font-size:clamp(40px,4.2vw,72px)}
.slide-main.long{font-size:clamp(34px,3.6vw,58px);line-height:1.25;letter-spacing:.01em}
.slide-main.lg .tj{color:var(--accent)}
.slide-sub{
  margin:0;font-size:clamp(16px,1.25vw,22px);font-weight:400;color:rgba(255,255,255,.72);
  letter-spacing:.08em;
}
.slide-sub .accent{color:var(--accent);font-weight:800}
.slide-lead{
  margin:0 0 20px;font-size:clamp(24px,2.2vw,38px);font-weight:800;line-height:1.4;
  color:#fff;letter-spacing:.02em;
}
.slide-lead .accent{color:var(--accent)}
.slide-lines{
  margin:0;display:flex;flex-direction:column;gap:16px;align-items:center;
  font-size:clamp(16px,1.3vw,22px);font-weight:400;color:rgba(255,255,255,.8);
  letter-spacing:.04em;line-height:1.5;
}
.hero-btns{
  margin-top:56px;display:flex;gap:20px;justify-content:center;
  pointer-events:auto;flex-wrap:wrap;
}
.hero-btns .btn{padding:18px 46px;font-size:17px;font-weight:700}
.hero-btns .btn:hover{transform:translateY(-3px) scale(1.03)}
.hero-btns .btn-accent:hover{background:var(--accent-2);box-shadow:0 16px 44px rgba(255,77,0,.5)}
.hero-btns .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.14);box-shadow:0 14px 36px rgba(0,0,0,.4)}
.hero-inner{position:relative;z-index:2;width:100%;min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;padding:0 24px 84px;pointer-events:none}
/* 404 页装饰网格 */
.hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 80% at 50% 40%,#000 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 90% 80% at 50% 40%,#000 40%,transparent 100%);
}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.hero-controls{
  position:absolute;right:0;bottom:8px;z-index:3;
  display:flex;gap:10px;align-items:center;pointer-events:auto;
}
.hero-dots{display:flex;gap:8px}
.hero-dots button{
  width:34px;height:4px;border-radius:4px;background:rgba(255,255,255,.22);
  transition:background .3s ease,width .3s ease;overflow:hidden;position:relative;
}
.hero-dots button.active{background:rgba(255,255,255,.35);width:58px}
.hero-dots button.active::after{
  content:"";position:absolute;inset:0;background:var(--accent);
  transform-origin:left;animation:dotFill 4.5s linear forwards;
}
@keyframes dotFill{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.hero-arrows{display:flex;gap:8px}
.hero-arrows button{
  width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line-dark);color:#fff;
  display:flex;align-items:center;justify-content:center;
  transition:border-color .3s,background .3s;
}
.hero-arrows button:hover{border-color:var(--accent);background:rgba(255,77,0,.14)}
.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  color:var(--txt-l2);font-size:12px;letter-spacing:.3em;z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:8px;
}
.scroll-hint::after{
  content:"";width:1px;height:42px;background:linear-gradient(var(--accent),transparent);
  animation:drip 1.8s ease infinite;
}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}55%{transform:scaleY(1);transform-origin:top}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- 卡片 ---------- */
.card{
  background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:34px 30px;
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;
}
.card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--accent),transparent);
  opacity:0;transition:opacity .35s ease;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.card:hover::before{opacity:1}
.card .ico{
  width:60px;height:60px;border-radius:16px;
  background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;margin-bottom:22px;
  transition:background .3s,color .3s;
}
.card:hover .ico{background:var(--accent);color:#fff}
.card h3{font-size:20px;font-weight:700;margin-bottom:12px}
.card p{color:var(--txt-2);font-size:15px;flex:1}
.card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.card .tags span{
  font-size:12px;padding:5px 12px;border-radius:999px;
  background:var(--paper-2);border:1px solid var(--line);color:var(--txt-2);font-weight:500;
}

/* 价值卡三栏 */
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.value-card{padding:40px 32px}
.value-card .idx{
  font-size:13px;font-weight:700;letter-spacing:.2em;color:var(--txt-3);
  margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.value-card .idx::after{content:"";width:34px;height:1px;background:var(--line)}

/* ---------- 数据条 ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.stat-strip .st{background:var(--paper);padding:44px 24px;text-align:center;transition:background .3s}
.stat-strip .st:hover{background:var(--accent-soft)}
.stat-strip .n{font-size:clamp(34px,4vw,52px);font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums}
.stat-strip .n em{font-style:normal;color:var(--accent)}
.stat-strip .t{font-size:14px;color:var(--txt-2);margin-top:6px;letter-spacing:.08em}

/* ---------- 案例 / 资讯 卡片 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.post-card{
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:var(--paper);transition:transform .35s ease,box-shadow .35s ease,border-color .35s;
  display:flex;flex-direction:column;
}
.post-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.post-thumb{
  aspect-ratio:16/9;position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.post-thumb .ph{
  position:absolute;inset:0;
  background:linear-gradient(135deg,var(--ink-2),var(--ink-3));
}
.post-thumb .ph::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:26px 26px;
}
.post-thumb .ph::after{
  content:"";position:absolute;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,0,.35),transparent 65%);
  right:-40px;top:-60px;
}
.post-thumb .ph-mark{
  position:relative;z-index:2;color:rgba(255,255,255,.9);
  font-weight:800;letter-spacing:.1em;
}
.post-thumb .ph-mark .big{display:block;font-size:clamp(22px,2.4vw,30px);color:#fff;text-align:center;padding:0 18px}
.post-thumb .ph-mark .small{display:block;font-size:12px;color:var(--txt-l2);margin-top:8px;text-align:center;letter-spacing:.3em}
.post-body{padding:24px 26px 28px;display:flex;flex-direction:column;flex:1}
.post-body .meta{
  display:flex;align-items:center;gap:10px;
  font-size:12.5px;color:var(--txt-3);margin-bottom:12px;letter-spacing:.04em;
}
.post-body .meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line)}
.post-body h3{font-size:18.5px;font-weight:700;line-height:1.5;margin-bottom:10px;transition:color .3s}
.post-card:hover h3{color:var(--accent)}
.post-body p{font-size:14.5px;color:var(--txt-2);flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body .more{
  margin-top:18px;font-size:14px;font-weight:600;color:var(--txt);
  display:inline-flex;align-items:center;gap:6px;
}
.post-body .more .arr{transition:transform .3s}
.post-card:hover .more{color:var(--accent)}
.post-card:hover .more .arr{transform:translateX(5px)}
/* 资讯页 · 常见问题问答文字列表 */
.post-card.faq-text{
  grid-column:1/-1;display:block;
  padding:24px 28px;border-left:3px solid var(--accent);
}
.post-card.faq-text:hover{transform:none;box-shadow:var(--shadow);border-color:var(--line);border-left-color:var(--accent)}
.post-card.faq-text .fq{display:flex;gap:12px;align-items:flex-start}
.post-card.faq-text .qm{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;
  background:var(--accent);color:#fff;font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.post-card.faq-text h3{font-size:17px;font-weight:700;line-height:1.5;margin:0;color:var(--txt)}
.post-card.faq-text .fa{color:var(--txt-2);font-size:15px;line-height:1.9;margin:12px 0 0 38px}
.more-row{display:flex;justify-content:center;margin-top:52px}

/* ---------- GEO 六大平台 Tabs ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:44px}
.tab-btn{
  padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid var(--line);color:var(--txt-2);background:var(--paper);
  transition:all .3s ease;
}
.tab-btn:hover{border-color:var(--accent);color:var(--accent)}
.tab-btn.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:slideIn .55s ease both}
.platform-panel{
  display:grid;grid-template-columns:1.05fr 1fr;gap:0;
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:var(--paper);
}
.platform-panel .pp-side{
  background:var(--ink);color:#fff;padding:46px 40px;
  display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden;
}
.platform-panel .pp-side::after{
  content:"";position:absolute;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,0,.28),transparent 65%);bottom:-120px;left:-100px;
}
.platform-panel .pp-side .no{font-size:13px;letter-spacing:.24em;color:#ff9c66;font-weight:700;margin-bottom:16px}
.platform-panel .pp-side h3{font-size:26px;font-weight:700;margin-bottom:14px;position:relative;z-index:2}
.platform-panel .pp-side p{color:var(--txt-l2);font-size:15px;position:relative;z-index:2}
.platform-panel .pp-side .badge{
  margin-top:22px;display:inline-flex;align-items:center;gap:8px;position:relative;z-index:2;
  font-size:13px;color:#ffb08a;letter-spacing:.06em;
}
.platform-panel .pp-side .badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.platform-panel .pp-body{padding:46px 40px}
.platform-panel .pp-body h4{font-size:16px;font-weight:700;color:var(--txt);margin-bottom:20px}
.platform-list li{
  display:flex;gap:12px;padding:11px 0;font-size:15px;color:var(--txt-2);
  border-bottom:1px dashed var(--line);align-items:flex-start;
}
.platform-list li:last-child{border-bottom:0}
.platform-list li::before{
  content:"✓";flex-shrink:0;width:22px;height:22px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-top:2px;
}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.step{
  position:relative;padding:36px 30px 34px;border:1px solid var(--line);
  border-radius:var(--radius-lg);background:var(--paper);
  transition:transform .35s,box-shadow .35s,border-color .35s;
  counter-increment:step;
}
.steps .step:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.step .step-no{
  font-size:13px;font-weight:800;letter-spacing:.2em;color:var(--accent);
  display:flex;align-items:center;gap:12px;margin-bottom:20px;
}
.step .step-no::before{
  content:"0" counter(step);
  font-size:34px;font-weight:800;color:transparent;
  -webkit-text-stroke:1.4px var(--accent);
}
.step h3{font-size:19px;font-weight:700;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--txt-2)}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:14px;background:var(--paper);overflow:hidden;
  transition:border-color .3s,box-shadow .3s;
}
.faq-item.open{border-color:var(--accent);box-shadow:0 14px 34px rgba(255,77,0,.10)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:20px 24px;text-align:left;font-size:16.5px;font-weight:600;color:var(--txt);
}
.faq-q .q-mark{
  flex-shrink:0;width:28px;height:28px;border-radius:8px;
  background:var(--ink);color:#fff;font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.faq-item.open .q-mark{background:var(--accent)}
.faq-q .toggle{
  margin-left:auto;flex-shrink:0;width:24px;height:24px;position:relative;
  transition:transform .35s ease;
}
.faq-q .toggle::before,.faq-q .toggle::after{
  content:"";position:absolute;background:var(--txt-3);border-radius:2px;
  transition:background .3s;
}
.faq-q .toggle::before{left:3px;right:3px;top:11px;height:2px}
.faq-q .toggle::after{top:3px;bottom:3px;left:11px;width:2px}
.faq-item.open .toggle{transform:rotate(45deg)}
.faq-item.open .toggle::before,.faq-item.open .toggle::after{background:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a-in{padding:0 24px 22px 68px;color:var(--txt-2);font-size:15px}

/* ---------- 广告栏 CTA ---------- */
.cta-banner{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  background:linear-gradient(120deg,var(--ink) 0%,var(--ink-2) 60%,#2a1a12 100%);
  color:#fff;padding:74px 60px;display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(ellipse at 20% 40%,#000,transparent 75%);
}
.cta-banner::after{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,0,.32),transparent 62%);right:-140px;top:-160px;
}
.cta-banner .cb-in{position:relative;z-index:2}
.cta-banner h3{font-size:clamp(22px,2.6vw,36px);font-weight:800;line-height:1.3;margin-bottom:14px}
.cta-banner h3 .accent{color:var(--accent)}
.cta-banner p{color:var(--txt-l2);font-size:16px;max-width:600px}
.cta-banner > .btn{position:relative;z-index:2;flex-shrink:0}
.cta-btns{display:flex;gap:14px;position:relative;z-index:2;flex-wrap:wrap}
.btn-br{display:none}
@media (min-width:1024px){
  .cta-banner > .btn .btn-br{display:inline}
  .cta-banner > .btn{line-height:1.3}
}
@media (max-width:1200px){
  .cta-banner{padding:64px 44px}
}

/* ---------- 内页 Hero ---------- */
.page-hero{
  position:relative;background:var(--ink);color:#fff;overflow:hidden;
  padding:calc(var(--header-h) + 90px) 0 84px;
}
.page-hero .ph-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 85% 90% at 30% 20%,#000 30%,transparent 100%);
}
.page-hero .ph-glow{
  position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,0,.2),transparent 60%);
  right:-120px;top:-180px;
}
.page-hero .ph-in{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--txt-l2);margin-bottom:22px}
.crumb a{color:var(--txt-l2);transition:color .3s}
.crumb a:hover{color:#fff}
.crumb .sep{color:#666;opacity:.6}
.crumb .cur{color:#fff}
.page-hero h1{font-size:clamp(34px,5vw,58px);font-weight:800;line-height:1.2;margin-bottom:18px}
.page-hero h1.ph-one{font-size:clamp(30px,4.4vw,54px)}
.page-hero h1 .accent{color:var(--accent)}
.page-hero .ph-sub{color:var(--txt-l2);font-size:17px;max-width:720px}

/* ---------- 面包屑 / 页面导航 ---------- */
.sub-nav{display:flex;gap:8px;flex-wrap:wrap}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr;gap:34px;align-items:start;max-width:900px;margin:0 auto}
.contact-info{
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:38px 44px;background:var(--paper);box-shadow:var(--shadow);
}
.contact-info .ci{
  display:flex;gap:18px;padding:24px 0;border-bottom:1px solid var(--line);align-items:flex-start;
}
.contact-info .ci:first-of-type{padding-top:0}
.contact-info .ci .ic{
  flex-shrink:0;width:52px;height:52px;border-radius:14px;
  background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
}
.contact-info .ci h4{font-size:15px;font-weight:700;margin-bottom:5px}
.contact-info .ci p{color:var(--txt-2);font-size:15px}
.contact-info .ci a{color:var(--txt);font-weight:600}
.contact-info .ci a:hover{color:var(--accent)}
.qr-row{display:flex;gap:20px;padding-top:26px}
.qr-box{text-align:center;flex:1;max-width:170px}
.qr-box .qr{width:100%;aspect-ratio:1;border:1px solid var(--line);border-radius:14px;padding:8px;background:#fff}
.qr-box .qr img{width:100%;height:100%;object-fit:contain}
.qr-box .qt{font-size:13px;color:var(--txt-2);margin-top:10px;font-weight:600}

.contact-form{
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:38px 36px;background:var(--paper);box-shadow:var(--shadow);
}
.contact-form h3{font-size:22px;font-weight:700;margin-bottom:6px}
.contact-form .form-sub{color:var(--txt-3);font-size:14px;margin-bottom:26px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--txt)}
.field label .req{color:var(--accent)}
.field input,.field textarea,.field select{
  width:100%;padding:13px 16px;border:1px solid var(--line);border-radius:10px;
  background:var(--paper-2);transition:border-color .3s,box-shadow .3s,background .3s;outline:none;
}
.field input:focus,.field textarea:focus,.field select:focus{
  border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(255,77,0,.12);
}
.field textarea{min-height:130px;resize:vertical}
.form-tip{font-size:12.5px;color:var(--txt-3);margin-top:12px}

/* ---------- 列表分页 ---------- */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:52px;flex-wrap:wrap}
.pagination button,.pagination a{
  min-width:42px;height:42px;padding:0 14px;border-radius:10px;
  border:1px solid var(--line);background:var(--paper);color:var(--txt-2);
  font-size:14.5px;font-weight:600;display:flex;align-items:center;justify-content:center;
  transition:all .3s;
}
.pagination button:hover:not(:disabled),.pagination a:hover{color:var(--accent);border-color:var(--accent)}
.pagination .current{background:var(--ink);color:#fff;border-color:var(--ink)}
.pagination button:disabled{opacity:.4;cursor:not-allowed}

/* ---------- 详情页 ---------- */
.detail-wrap{max-width:880px;margin:0 auto}
.detail-head{margin-bottom:36px}
.detail-head .meta{display:flex;gap:14px;color:var(--txt-3);font-size:14px;margin:18px 0 14px;flex-wrap:wrap;align-items:center}
.detail-head .meta .tag{color:var(--accent);font-weight:600}
.detail-head h1{font-size:clamp(28px,4vw,42px);font-weight:800;line-height:1.3}
.detail-body{font-size:16px;color:#333;line-height:2}
.detail-body h2{font-size:22px;font-weight:700;margin:34px 0 14px;color:var(--txt)}
.detail-body h3{font-size:18px;font-weight:700;margin:26px 0 10px;color:var(--txt)}
.detail-body p{margin-bottom:16px}
.detail-body ul{margin:0 0 18px 0;padding:0}
.detail-body ul li{position:relative;padding-left:22px;margin-bottom:8px}
.detail-body ul li::before{content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.detail-body .quote{
  border-left:3px solid var(--accent);background:var(--accent-soft);
  padding:18px 22px;border-radius:0 12px 12px 0;margin:22px 0;font-weight:500;color:var(--txt);
}
.detail-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.detail-body table th,.detail-body table td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.detail-body table th{background:var(--paper-2);font-weight:700}
.kv-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}
.kv-list .kv{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--paper-2)}
.kv-list .kv b{display:block;font-size:14px;margin-bottom:4px}
.kv-list .kv span{font-size:13.5px;color:var(--txt-2)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--txt-l2);padding:80px 0 0;position:relative}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,transparent,var(--accent) 50%,transparent);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:56px}
.footer-brand .logo{height:36px;margin-bottom:18px}
.footer-brand p{font-size:14.5px;line-height:2;max-width:300px}
.footer-col h4{color:#fff;font-size:15.5px;font-weight:700;margin-bottom:20px;letter-spacing:.06em}
.footer-col ul li{margin-bottom:11px}
.footer-col ul:not(.footer-contact) a{font-size:14.5px;color:var(--txt-l2);transition:color .3s,padding-left .3s;position:relative}
.footer-col ul:not(.footer-contact) a:hover{color:var(--accent);padding-left:6px}
.footer-col ul:not(.footer-contact) a::before{content:"›";margin-right:8px;color:var(--accent);opacity:0;transition:opacity .3s}
.footer-col ul:not(.footer-contact) a:hover::before{opacity:1}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;margin-bottom:13px;font-size:14.5px;line-height:1.6}
.footer-contact svg{flex-shrink:0;margin-top:3.5px;color:var(--accent)}
.footer-contact a:hover{color:var(--accent)}
.footer-qrs{display:flex;gap:16px;margin-top:6px}
.footer-qrs .qr{width:104px;text-align:center}
.footer-qrs .qr img{width:100%;aspect-ratio:1;object-fit:contain;border-radius:10px;background:#fff;padding:6px}
.footer-qrs .qr span{font-size:12px;color:var(--txt-l2);margin-top:6px;display:block}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding:24px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--txt-3);
}
.footer-bottom a{color:var(--txt-l2)}
.footer-bottom a:hover{color:var(--accent)}
.footer-bottom .flinks a{margin-left:18px}

/* ---------- 移动端底部栏 ---------- */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:150;
  background:rgba(12,13,15,.97);backdrop-filter:blur(12px);
  border-top:1px solid var(--line-dark);padding:8px 10px calc(8px + env(safe-area-inset-bottom));
}
.mobile-bar .bar-in{display:flex}
.mobile-bar a{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
  color:var(--txt-l2);font-size:11.5px;font-weight:600;letter-spacing:.04em;padding:4px 0;
  transition:color .3s;
}
.mobile-bar a.active,.mobile-bar a:hover{color:var(--accent)}
.mobile-bar a svg{width:22px;height:22px}

/* ---------- 二维码弹窗 ---------- */
.modal{
  position:fixed;inset:0;z-index:300;display:flex;align-items:center;justify-content:center;
  background:rgba(8,9,10,.7);backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:.35s ease;
}
.modal.open{opacity:1;visibility:visible}
.modal-card{
  background:#fff;border-radius:var(--radius-lg);padding:34px 38px 30px;text-align:center;
  transform:translateY(24px) scale(.96);transition:.35s ease;max-width:330px;width:calc(100% - 40px);
  box-shadow:var(--shadow-lg);
}
.modal.open .modal-card{transform:none}
.modal-card h3{font-size:18px;font-weight:700;margin-bottom:6px}
.modal-card p{font-size:13px;color:var(--txt-2);margin-bottom:18px}
.modal-card .qr{width:200px;margin:0 auto 6px}
.modal-card .qr img{width:100%;height:auto;border:1px solid var(--line);border-radius:12px;padding:8px}
.modal-close{
  position:absolute;right:22px;top:22px;width:36px;height:36px;border-radius:50%;
  background:var(--paper-2);color:var(--txt);font-size:18px;display:flex;align-items:center;justify-content:center;
  transition:background .3s,color .3s,transform .3s;
}
.modal-close:hover{background:var(--accent);color:#fff;transform:rotate(90deg)}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:110px;z-index:140;width:46px;height:46px;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 30px rgba(12,13,15,.3);
  opacity:0;visibility:hidden;transform:translateY(14px);transition:.35s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--accent)}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:120px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:15px 26px;border-radius:999px;
  font-size:14.5px;font-weight:500;box-shadow:var(--shadow-lg);z-index:400;
  opacity:0;visibility:hidden;transition:.4s ease;max-width:90vw;text-align:center;
}
.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

/* ---------- 动画 ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal-l{opacity:0;transform:translateX(-36px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal-l.in{opacity:1;transform:none}
.reveal-r{opacity:0;transform:translateX(36px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal-r.in{opacity:1;transform:none}
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}
.d4{transition-delay:.4s}.d5{transition-delay:.5s}

/* ---------- 机制示意图 ---------- */
.mech-wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.mech-ring{position:relative;width:100%;max-width:470px;aspect-ratio:1;margin:0 auto}
.mech-ring .r-core{
  position:absolute;inset:0;margin:auto;width:31%;height:31%;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  flex-direction:column;text-align:center;z-index:3;box-shadow:0 0 60px rgba(255,77,0,.35);
}
.mech-ring .r-core b{font-size:clamp(15px,1.6vw,20px);letter-spacing:.1em}
.mech-ring .r-core small{font-size:11px;color:var(--txt-l2);letter-spacing:.16em;margin-top:4px}
.mech-ring .ring-line{
  position:absolute;inset:0;border-radius:50%;
  border:1px dashed rgba(255,77,0,.35);
  animation:spin 40s linear infinite;
}
.mech-ring .ring-line.r2{inset:12%;animation-duration:28s;border-color:rgba(255,255,255,.16)}
@keyframes spin{to{transform:rotate(360deg)}}
.mech-node{
  position:absolute;z-index:4;transform:translate(-50%,-50%);
  background:var(--paper);border:1px solid var(--line);border-radius:12px;
  padding:9px 12px;font-size:13px;font-weight:600;color:var(--txt);white-space:nowrap;
  box-shadow:0 8px 22px rgba(12,13,15,.10);display:flex;align-items:center;gap:7px;
  transition:border-color .3s,color .3s;
}
.mech-node:hover{border-color:var(--accent);color:var(--accent)}
.mech-node::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.mech-legend h3{font-size:20px;font-weight:700;margin-bottom:16px}
.mech-legend ul li{
  display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line);
  font-size:15px;color:var(--txt-2);align-items:flex-start;
}
.mech-legend ul li b{color:var(--txt);font-weight:700;flex-shrink:0;min-width:86px}
.bg-dark .mech-legend ul li{color:var(--txt-l2)}
.bg-dark .mech-legend ul li b{color:#fff}
.mech-legend ul li::before{content:"";flex-shrink:0;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:9px}

/* ---------- 关于页 ---------- */
.about-intro{display:grid;grid-template-columns:1.15fr 1fr;gap:60px;align-items:center}
.about-intro .txt p{color:var(--txt-2);font-size:16.5px;margin-bottom:18px;line-height:2}
.about-intro .txt p b{color:var(--txt)}
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-item{position:relative;padding:0 0 26px 26px}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:6px;width:16px;height:16px;border-radius:50%;
  background:var(--paper);border:3px solid var(--accent);
}
.tl-item:last-child::before{background:var(--accent);box-shadow:0 0 0 6px var(--accent-soft)}
.tl-item .yr{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.14em;margin-bottom:6px}
.tl-item h4{font-size:17px;font-weight:700;margin-bottom:6px}
.tl-item p{font-size:14.5px;color:var(--txt-2)}
.mission-card{
  border-radius:var(--radius-lg);background:var(--ink);color:#fff;padding:44px 40px;position:relative;overflow:hidden;
}
.mission-card::after{
  content:"";position:absolute;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,0,.3),transparent 65%);right:-90px;bottom:-120px;
}
.mission-card h3{font-size:22px;font-weight:700;margin-bottom:16px;position:relative;z-index:2}
.mission-card ul{position:relative;z-index:2}
.mission-card ul li{
  display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line-dark);
  font-size:15px;color:var(--txt-l2);align-items:flex-start;
}
.mission-card ul li:last-child{border-bottom:0}
.mission-card ul li b{color:#fff}
.mission-card ul li::before{content:"◆";color:var(--accent);font-size:12px;margin-top:5px}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:76px 0}
  .value-grid,.post-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .mech-wrap{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .contact-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .main-nav{display:none}
  .header-tel{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .header-cta{display:none}
  .site-header{padding:0}
}
@media (max-width:720px){
  .section{padding:64px 0}
  .section.tight{padding:48px 0}
  .header-in{gap:12px}
  .brand .logo{height:26px}
  .value-grid,.post-grid,.steps{grid-template-columns:1fr}
  .hero-inner{padding:0 16px 76px}
  .hero-slide{background-size:cover;background-position:left center}
  .hero-slide.hs1{background-image:url("../images/hero-bg-1-new.png")}
  .hero-slide.hs2{background-image:url("../images/hero-bg-2-new.png")}
  .hero-slide.hs3{background-image:url("../images/hero-bg-3-new.png")}
  .hero-slide:nth-child(2){background-position:14% center}
  .slide-content{justify-content:center;padding:0 20px}
  .slide-tag{font-size:14px;margin-bottom:16px;letter-spacing:.18em}
  .slide-main{font-size:34px;margin-bottom:14px;line-height:1.2}
  .slide-main.lg{font-size:32px}
  .slide-main.long{font-size:26px;line-height:1.3;letter-spacing:.01em}
  .slide-sub{font-size:13px;letter-spacing:.04em}
  .slide-lead{font-size:19px;margin-bottom:12px}
  .slide-lines{font-size:13px;gap:10px}
  .hero-btns{margin-top:28px;gap:10px}
  .hero-btns .btn{padding:12px 22px;font-size:14px}
  .hero-controls{position:static;justify-content:space-between;margin-top:34px}
  .scroll-hint{display:none}
  .platform-panel{grid-template-columns:1fr}
  .cta-banner{padding:50px 28px;flex-direction:column;text-align:center;align-items:flex-start}
  .cta-banner h3 br{display:none}
  .cta-banner .btn{width:100%;justify-content:center}
  .cta-btns{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-brand p{max-width:100%}
  .footer-grid .footer-col:nth-child(2),.footer-grid .footer-col:nth-child(3){display:none}
  .form-row{grid-template-columns:1fr}
  .about-intro{grid-template-columns:1fr;gap:40px}
  .kv-list{grid-template-columns:1fr}
  .mobile-bar{display:block}
  body{padding-bottom:62px}
  .to-top{bottom:84px;right:16px}
  .footer-bottom{flex-direction:column;gap:8px}
  .modal-card{padding:30px 24px 26px}
  .mech-node{font-size:11px;padding:7px 9px}
}
@media (max-width:480px){
  .brand .logo{height:24px}
}
@media (max-width:360px){
  .brand .logo{height:22px}
  .header-in{gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/*滚动条样式*/

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background-color: #0003;
    border-radius: 10px;
    transition: all .2s ease-in-out;
}

::-webkit-scrollbar-thumb:hover {
    cursor: pointer;
    background-color: #0000004d;
}

/*滚动条样式*/