/* ============ 元途AI · 共享样式 ============ */
:root{
  --void:#0A141F;
  --steel:#24404F;
  --horizon:#E7A96B;
  --cyan:#49D9E8;
  --mist:#B9C4CC;
  --paper:#F5F6F7;
  --ink:#10161C;
  --line:#E4E7EA;
  --white:#FFFFFF;
  --display:'Space Grotesk', sans-serif;
  --body:'Inter', sans-serif;
  --mono:'JetBrains Mono', monospace;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}
.wrap{max-width:1200px; margin:0 auto; padding:0 40px;}
@media (max-width:640px){ .wrap{padding:0 20px;} }

/* ===== NAV ===== */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:300;
  padding:8px 0;
  background:linear-gradient(180deg, rgba(6,12,19,0.65) 0%, rgba(6,12,19,0) 100%);
  transition:background .3s ease, padding .3s ease;
}
.nav.solid{
  background:rgba(8,15,23,0.88);
  backdrop-filter:blur(14px);
  padding:6px 0;
}
.nav .wrap{display:flex; align-items:center; justify-content:space-between;}
.logo{
  font-family:var(--display); font-weight:700; font-size:17px; letter-spacing:-0.01em;
  color:var(--white); display:flex; align-items:center; gap:8px;
}
.logo img{height:100px; width:auto; display:block;}
.nav-links{display:flex; gap:30px; font-size:13.5px;}
.nav-links a{position:relative; padding:4px 0; color:rgba(255,255,255,0.82); transition:color .15s;}
.nav-links a:hover{color:var(--white);}
.nav-links a.active{color:var(--cyan);}
.nav-right{display:flex; align-items:center; gap:22px;}
.nav-cta{
  background:var(--cyan); color:var(--void); padding:8px 18px; border-radius:100px;
  font-size:13px; font-weight:700; white-space:nowrap; transition:background .15s, transform .15s;
}
.nav-cta:hover{background:var(--horizon); transform:translateY(-1px);}
.menu-btn{display:none; background:none; border:none; font-size:22px; cursor:pointer; color:var(--white);}
@media (max-width:900px){
  .nav-links{display:none;}
  .menu-btn{display:block;}
}

/* ===== HERO (dusk gradient, no photo) ===== */
.hero{
  position:relative;
  min-height:100vh;
  box-sizing:border-box;
  padding-top:150px; padding-bottom:70px;
  display:flex; align-items:center; justify-content:center;
  overflow:hidden;
  background:linear-gradient(180deg,
    #0A1620 0%,
    #123047 20%,
    #23495A 38%,
    #4C6B67 54%,
    #B98E5E 66%,
    #E7A96B 72%,
    #7A5238 84%,
    #1B140F 100%);
  text-align:center;
  color:var(--white);
}
.hero.sub-hero{ min-height:58vh; padding-top:150px; padding-bottom:56px; }
.hero::before{
  /* horizon glow */
  content:''; position:absolute; left:50%; top:66%; transform:translate(-50%,-50%);
  width:140%; padding-bottom:70%;
  background:radial-gradient(ellipse at center, rgba(255,205,150,0.38) 0%, rgba(255,205,150,0) 62%);
  pointer-events:none;
  z-index:0;
}
.hero-canvas{
  position:absolute; inset:0; width:100%; height:100%; z-index:1;
  pointer-events:none;
}
.hero-inner{position:relative; z-index:2; max-width:760px; padding:0 24px;}
.eyebrow{
  font-family:var(--mono); font-size:13px; color:var(--cyan); letter-spacing:0.08em;
  margin-bottom:22px; text-transform:uppercase;
}
.hero h1{
  font-family:var(--display); font-size:clamp(32px,5vw,58px); line-height:1.15;
  font-weight:700; letter-spacing:-0.02em; margin-bottom:18px;
}
.hero h1 .accent{color:var(--horizon);}
.hero-sub{
  font-size:17px; color:rgba(255,255,255,0.78); max-width:520px; margin:0 auto 34px;
}
.cta-row{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}
.btn-primary{
  background:var(--white); color:var(--void); padding:14px 28px; border-radius:100px;
  font-weight:700; font-size:14.5px; display:inline-flex; align-items:center; gap:6px;
  transition:background .15s, transform .15s;
}
.btn-primary:hover{background:var(--cyan); transform:translateY(-1px);}
.btn-ghost{
  border:1px solid rgba(255,255,255,0.4); color:var(--white); padding:14px 28px; border-radius:100px;
  font-weight:600; font-size:14.5px; display:inline-flex; align-items:center; gap:6px;
  transition:border-color .15s, background .15s;
}
.btn-ghost:hover{border-color:var(--white); background:rgba(255,255,255,0.08);}

/* ===== TICKER (系统状态滚动条) ===== */
.ticker-strip{
  background:var(--void); overflow:hidden; padding:15px 0; position:relative;
  border-top:1px solid rgba(73,217,232,0.18); border-bottom:1px solid rgba(73,217,232,0.18);
}
.ticker-track{
  display:flex; gap:32px; white-space:nowrap; width:max-content;
  font-family:var(--mono); font-size:12.5px; color:var(--cyan); letter-spacing:.07em;
  animation:tickerScroll 26s linear infinite;
}
.ticker-track span{opacity:.82; text-transform:uppercase;}
.ticker-track span.dim{color:var(--mist); opacity:.5;}
@keyframes tickerScroll{ from{transform:translateX(0);} to{transform:translateX(-50%);} }

/* ===== SECTION ===== */
.section{padding:100px 0;}
.section.alt{background:var(--white); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.sec-head{max-width:600px; margin:0 auto 56px;}
.sec-head.left{margin:0 0 56px;}
.sec-eyebrow{font-family:var(--mono); font-size:12px; color:var(--steel); letter-spacing:0.06em; margin-bottom:12px; text-transform:uppercase;}
.sec-head h2{font-family:var(--display); font-size:clamp(26px,3.2vw,38px); font-weight:700; letter-spacing:-0.02em; margin-bottom:16px;}
.sec-head p{color:#5B6472; font-size:16px;}
.center{text-align:center;}
.center .sec-head{margin-left:auto; margin-right:auto;}

/* ===== CAPABILITY CARDS ===== */
.cap-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden;}
@media (max-width:900px){.cap-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.cap-grid{grid-template-columns:1fr;}}
.cap-card{background:var(--white); padding:34px 26px; transition:background .2s, box-shadow .2s;}
.cap-card:hover{box-shadow:inset 0 0 0 1px rgba(73,217,232,0.4);}
.cap-icon{
  width:38px; height:38px; border-radius:9px; margin-bottom:22px;
  background:linear-gradient(135deg, var(--steel), var(--void));
  display:flex; align-items:center; justify-content:center; color:var(--cyan); font-family:var(--mono); font-size:14px; font-weight:700;
}
.cap-card h3{font-family:var(--display); font-size:17px; font-weight:600; margin-bottom:10px;}
.cap-card p{font-size:14px; color:#5B6472;}

/* ===== COMPARE (GEO page) ===== */
.compare{display:grid; grid-template-columns:1fr 1fr; gap:20px;}
@media (max-width:760px){.compare{grid-template-columns:1fr;}}
.cmp-card{border-radius:14px; padding:32px; border:1px solid var(--line); background:var(--white);}
.cmp-card.win{border-color:var(--steel); box-shadow:0 0 0 1px var(--steel);}
.cmp-card .tag{font-family:var(--mono); font-size:11px; color:#5B6472; margin-bottom:8px; display:block; text-transform:uppercase;}
.cmp-card.win .tag{color:var(--cyan); background:var(--void); display:inline-block; padding:3px 10px; border-radius:20px;}
.cmp-card h4{font-family:var(--display); font-size:19px; margin:14px 0 18px;}
.cmp-card ul{list-style:none;}
.cmp-card li{font-size:14px; color:#5B6472; padding:10px 0; border-top:1px solid var(--line); display:flex; gap:10px;}
.cmp-card li:first-child{border-top:none;}
.cmp-card.win li{color:var(--ink);}
.cmp-card.win li b{color:var(--steel);}

/* ===== PROCESS ===== */
.process{display:grid; grid-template-columns:repeat(4,1fr); gap:28px;}
@media (max-width:900px){.process{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.process{grid-template-columns:1fr;}}
.step-n{font-family:var(--display); font-size:34px; font-weight:700; color:var(--line); margin-bottom:14px;}
.step h3{font-size:16px; font-weight:600; margin-bottom:8px;}
.step p{font-size:14px; color:#5B6472;}

/* ===== STATS STRIP ===== */
.stats{display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border-radius:12px; overflow:hidden; border:1px solid var(--line);}
@media (max-width:760px){.stats{grid-template-columns:repeat(2,1fr);}}
.stat{background:var(--void); color:var(--white); padding:34px 26px;}
.stat .num{font-family:var(--display); font-size:32px; font-weight:700; color:var(--horizon);}
.stat .label{font-size:12.5px; color:var(--mist); margin-top:8px;}

/* ===== NEWS ===== */
.tabs{display:flex; gap:10px; margin-bottom:36px; flex-wrap:wrap;}
.tab{
  font-size:13.5px; font-family:var(--mono); padding:9px 18px; border-radius:100px;
  border:1px solid var(--line); color:#5B6472; cursor:pointer; transition:all .15s; background:var(--white);
}
.tab.active{background:var(--void); border-color:var(--void); color:var(--white);}
.news-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
@media (max-width:860px){.news-grid{grid-template-columns:1fr;}}
.news-card{border:1px solid var(--line); border-radius:14px; padding:0; background:var(--white); overflow:hidden; transition:border-color .15s, transform .15s;}
.news-card:hover{border-color:var(--steel); transform:translateY(-2px);}
.news-thumb{height:130px; background:linear-gradient(135deg, var(--steel), var(--void)); position:relative;}
.news-thumb::after{
  content:''; position:absolute; inset:0;
  background-image:linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size:22px 22px;
}
.news-body{padding:22px 24px 26px;}
.news-tag{font-family:var(--mono); font-size:10.5px; color:var(--steel); text-transform:uppercase; letter-spacing:.04em;}
.news-date{font-family:var(--mono); font-size:11px; color:#9AA5B0; margin:8px 0 12px;}
.news-card h3{font-size:15.5px; font-weight:600; margin-bottom:8px; line-height:1.45;}
.news-card p{font-size:13.5px; color:#5B6472;}

/* ===== FAQ ===== */
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%; text-align:left; background:none; border:none; padding:24px 0;
  font-size:16px; font-weight:600; font-family:var(--body); color:var(--ink);
  display:flex; justify-content:space-between; align-items:center; cursor:pointer;
}
.faq-q .plus{font-family:var(--mono); font-size:18px; color:var(--steel); transition:transform .2s;}
.faq-item.open .plus{transform:rotate(45deg); color:var(--cyan);}
.faq-a{max-height:0; overflow:hidden; transition:max-height .25s ease;}
.faq-a p{padding-bottom:24px; font-size:14.5px; color:#5B6472; max-width:680px;}

/* ===== CTA BLOCK ===== */
.cta-block{
  background:var(--void); color:var(--white); border-radius:22px; padding:60px 40px; text-align:center;
  position:relative; overflow:hidden;
}
.cta-block::before{
  content:''; position:absolute; left:50%; top:0; transform:translateX(-50%);
  width:60%; height:100%;
  background:radial-gradient(ellipse at center, rgba(73,217,232,0.16), transparent 70%);
}
.cta-block h2{font-family:var(--display); font-size:clamp(24px,3vw,34px); margin-bottom:14px; position:relative;}
.cta-block p{color:var(--mist); margin-bottom:28px; position:relative;}
.cta-block .cta-row{position:relative;}

/* ===== CONTACT MODAL (企业微信二维码弹窗) ===== */
.modal-overlay{
  position:fixed; inset:0; z-index:1000;
  background:rgba(8,14,20,0.6); backdrop-filter:blur(4px);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; transition:opacity .2s ease;
  padding:20px;
}
.modal-overlay.active{opacity:1; visibility:visible;}
.modal-card{
  background:var(--white); border-radius:18px; padding:36px 36px 30px;
  max-width:340px; width:100%; text-align:center; position:relative;
  transform:translateY(12px); transition:transform .2s ease;
  box-shadow:0 30px 60px -20px rgba(0,0,0,0.35);
}
.modal-overlay.active .modal-card{transform:translateY(0);}
.modal-close{
  position:absolute; top:14px; right:14px; width:30px; height:30px; border-radius:50%;
  border:none; background:var(--paper); color:var(--slate,#5B6472); font-size:16px; cursor:pointer;
  display:flex; align-items:center; justify-content:center; transition:background .15s;
}
.modal-close:hover{background:var(--line);}
.modal-card h3{font-family:var(--display); font-size:18px; font-weight:700; margin-bottom:6px; color:var(--ink);}
.modal-card p{font-size:13.5px; color:#5B6472; margin-bottom:20px;}
.modal-card img{width:100%; max-width:220px; border-radius:10px; margin:0 auto; border:1px solid var(--line);}
.modal-card .modal-tag{font-family:var(--mono); font-size:11px; color:var(--steel); letter-spacing:.05em; margin-top:16px; text-transform:uppercase;}

/* ===== ADVANTAGE GRID (核心优势) ===== */
.adv-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden;}
@media (max-width:860px){.adv-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.adv-grid{grid-template-columns:1fr;}}
.adv-card{background:var(--white); padding:30px 26px;}
.adv-card h3{font-family:var(--display); font-size:16px; font-weight:600; margin-bottom:10px;}
.adv-card p{font-size:13.5px; color:#5B6472;}

/* ===== SERVICE TAGS (业务板块子项标签) ===== */
.tag-list{display:flex; flex-wrap:wrap; gap:8px; margin-top:16px;}
.tag-pill{font-family:var(--mono); font-size:11.5px; color:var(--steel); background:var(--paper); border:1px solid var(--line); padding:5px 12px; border-radius:20px;}

/* ===== PRICING ===== */
.price-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
@media (max-width:900px){.price-grid{grid-template-columns:1fr;}}
.price-card{border:1px solid var(--line); border-radius:16px; padding:32px 28px; background:var(--white); display:flex; flex-direction:column;}
.price-card.featured{border-color:var(--steel); box-shadow:0 0 0 1px var(--steel);}
.price-tag{font-family:var(--mono); font-size:11px; color:var(--steel); text-transform:uppercase; letter-spacing:.05em; margin-bottom:12px;}
.price-card h3{font-family:var(--display); font-size:18px; font-weight:700; margin-bottom:10px;}
.price-num{font-family:var(--display); font-size:28px; font-weight:700; color:var(--void); margin-bottom:16px;}
.price-num small{font-size:13px; color:#5B6472; font-weight:500;}
.price-audience{font-size:13px; color:#5B6472; margin-bottom:20px; padding-bottom:20px; border-bottom:1px solid var(--line);}
.price-card ul{list-style:none; flex:1;}
.price-card li{font-size:13.5px; color:var(--ink); padding:7px 0; display:flex; gap:8px; align-items:flex-start;}
.price-card li::before{content:'✓'; color:var(--steel); font-weight:700; flex-shrink:0;}
.price-note{font-size:12.5px; color:#9AA5B0; margin-top:20px; text-align:center;}

/* ===== CONTACT CARDS ===== */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px;}
@media (max-width:700px){.contact-grid{grid-template-columns:1fr;}}
.contact-card{border:1px solid var(--line); border-radius:16px; padding:32px; background:var(--white); transition:border-color .15s;}
.contact-card:hover{border-color:var(--steel);}
.contact-icon{width:44px; height:44px; border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:19px; margin-bottom:22px; color:#fff;}
.contact-icon.c-green{background:#10B981;}
.contact-icon.c-purple{background:#8B5CF6;}
.contact-icon.c-red{background:#EF4444;}
.contact-icon.c-blue{background:#3B82F6;}
.contact-card .c-label{font-size:13px; color:#5B6472; margin-bottom:8px;}
.contact-card .c-value{font-family:var(--display); font-size:19px; font-weight:700; color:var(--ink); margin-bottom:8px;}
.contact-card .c-note{font-size:12.5px; color:#9AA5B0;}
.contact-card .c-note.pending{color:var(--horizon);}

/* ===== FOOTER ===== */
footer{padding:60px 0 34px; color:#5B6472; font-size:13.5px; background:var(--paper); border-top:1px solid var(--line);}
.foot-grid{display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px; margin-bottom:40px;}
.foot-links{display:flex; gap:28px;}
.foot-links a:hover{color:var(--ink);}
.foot-bottom{border-top:1px solid var(--line); padding-top:24px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}
footer .logo{color:var(--ink);}
footer .logo img{height:100px;}