/* ============================================================
   AI 企雷达 · 首页 V1（2026-09-15 深色太空版）
   —— 上一版（浅色）归档：versions/style-v0-2026-09-15.css
   —— 本版特点：深色时空感 / 大图背景 / 少字多图 / 玻璃拟态
   ============================================================ */

:root{
  --bg0:#080d1b;
  --bg1:#0d1428;
  --bg2:#131c36;
  --ink:#eaf0ff;
  --ink2:#c2cde9;
  --muted:#8593b8;
  --line:rgba(132,162,255,.14);
  --line2:rgba(132,162,255,.28);
  --cyan:#2fe0ff;
  --violet:#7a5cff;
  --blue:#3d6cff;
  --grad:linear-gradient(115deg,#2fe0ff 0%,#7a5cff 100%);
  --panel:rgba(255,255,255,.045);
  --panel-hi:rgba(255,255,255,.08);
  --radius:18px;
  --shadow:0 22px 55px rgba(0,0,0,.55);
  --maxw:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg0);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{line-height:1.25;margin:0}
p{margin:0}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ── 通用按钮 ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:999px;border:none;cursor:pointer;
  font-size:15px;font-weight:700;font-family:inherit;
  background:var(--grad);color:#04070f;
  box-shadow:0 10px 30px rgba(58,110,255,.35);
  transition:transform .18s,box-shadow .18s,opacity .18s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(58,110,255,.5)}
.btn-ghost{
  background:rgba(255,255,255,.05);color:var(--ink);
  border:1px solid var(--line2);box-shadow:none;backdrop-filter:blur(8px);
}
.btn-ghost:hover{background:rgba(255,255,255,.1);box-shadow:0 10px 26px rgba(0,0,0,.4)}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ── 顶部导航 ── */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(4,6,14,.55);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(132,162,255,.08);
}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.logo{
  display:flex;align-items:center;gap:9px;
  font-size:16px;font-weight:800;letter-spacing:.3px;white-space:nowrap;
}
.logo .dot{
  width:11px;height:11px;border-radius:50%;flex-shrink:0;
  background:radial-gradient(circle at 32% 32%,#7ef3ff,#2fe0ff 45%,#5a4cff 100%);
  box-shadow:0 0 14px rgba(47,224,255,.9),0 0 30px rgba(122,92,255,.6);
}
.vbadge{
  font-size:11px;font-weight:800;letter-spacing:.6px;
  padding:2px 8px;border-radius:6px;
  color:#8ff0ff;background:rgba(47,224,255,.12);
  border:1px solid rgba(47,224,255,.35);
}
.nav-links{margin-left:auto;display:flex;gap:22px;font-size:14px;color:var(--ink2)}
.nav-links a{opacity:.85;transition:opacity .15s}
.nav-links a:hover{opacity:1;color:#fff}
.nav-links a.active{color:var(--cyan)}
.menu-btn{
  display:none;margin-left:auto;background:none;border:none;color:var(--ink);
  font-size:22px;cursor:pointer;padding:4px 8px;line-height:1;
}
.mobile-menu{
  display:none;flex-direction:column;gap:2px;padding:10px 22px 16px;
  border-top:1px solid var(--line);
}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:10px 2px;color:var(--ink2);font-size:15px}
@media(max-width:820px){
  .nav-links{display:none}
  .menu-btn{display:block}
}

/* ── Hero（城市夜景大图）── */
.hero{
  position:relative;
  padding:132px 0 0;
  background:var(--bg1);
  overflow:hidden;
}
/* 背景图单独一层：便于整体提亮（图片本身不变） */
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("img/hero-city.png");
  background-size:cover;
  background-position:center 20%;
  background-repeat:no-repeat;
  filter:brightness(1.16) saturate(1.06);
}
/* 压暗层（已减淡：只保住文字可读，不再压黑画面） */
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(120% 80% at 50% 0%,rgba(47,224,255,.14),transparent 62%),
    linear-gradient(180deg,rgba(6,10,22,.62) 0%,rgba(6,10,22,.34) 30%,rgba(6,10,22,.68) 78%,var(--bg0) 100%);
}
.hero > .container{position:relative;z-index:2}
.hero-inner{max-width:760px;margin:0 auto;text-align:center;padding-bottom:44px;position:relative}
/* 文字背后的柔和暗晕：只压文字区，图片其余部分保持明亮 */
.hero-inner::before{
  content:"";position:absolute;z-index:-1;
  left:50%;top:50%;transform:translate(-50%,-50%);
  width:min(940px,124%);height:106%;
  border-radius:50%;
  background:radial-gradient(closest-side,rgba(4,8,18,.68),rgba(4,8,18,.36) 58%,transparent 100%);
  filter:blur(12px);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.4px;
  padding:6px 15px;border-radius:999px;
  color:#a9e9ff;background:rgba(47,224,255,.09);
  border:1px solid rgba(47,224,255,.28);
  backdrop-filter:blur(8px);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);font-style:normal}
.hero h1{
  margin:22px 0 0;
  font-size:clamp(30px,5.2vw,54px);
  font-weight:900;letter-spacing:-.5px;
  text-shadow:0 4px 28px rgba(0,0,0,.8),0 2px 8px rgba(0,0,0,.6);
}
.hero h1 em{
  font-style:normal;
  font-weight:900;
  color:#7af0ff;
  text-shadow:0 0 22px rgba(47,224,255,.55);
}
.hero .sub{
  margin:18px auto 0;max-width:600px;
  font-size:clamp(14.5px,1.6vw,17px);line-height:1.75;color:#d9e3f9;
  text-shadow:0 2px 18px rgba(0,0,0,.85),0 1px 3px rgba(0,0,0,.7);
}
.hero .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.hero-note{margin-top:20px;font-size:13px;color:#bdc9e6;text-shadow:0 2px 12px rgba(0,0,0,.85)}
@media(max-width:560px){
  .hero{padding-top:110px}
  .hero .cta .btn{width:100%}
}

/* ── 平台信任条（玻璃条，压在 Hero 底部）── */
.trust{
  position:relative;z-index:3;
  margin:0 auto;
  max-width:var(--maxw);
  padding:0 22px 0;
}
.trust-box{
  background:linear-gradient(135deg,rgba(32,46,88,.82),rgba(18,26,52,.86));
  border:1px solid var(--line2);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
  padding:20px 24px;
  display:flex;align-items:center;gap:26px;flex-wrap:wrap;
}
.trust-num{
  font-size:44px;font-weight:900;line-height:1;letter-spacing:-1.5px;flex-shrink:0;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.trust-num span{font-size:19px;font-weight:800;margin-left:1px}
.trust-txt{display:flex;flex-direction:column;gap:2px;min-width:200px}
.trust-txt b{font-size:15px;color:var(--ink)}
.trust-txt span{font-size:13px;color:var(--muted)}
.pwall{
  display:grid;grid-template-columns:repeat(5,1fr);gap:9px;
  flex:1;min-width:300px;
}
.pcard{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:11px 6px;border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.09);
  transition:transform .18s,border-color .18s,background .18s;
}
.pcard:hover{transform:translateY(-3px);border-color:var(--line2);background:rgba(255,255,255,.09)}
.pcard .plg{
  width:32px;height:32px;border-radius:9px;
  background:rgba(255,255,255,.9);
  display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0;
}
.pcard .plg img{width:24px;height:24px;object-fit:contain}
.pcard b{font-size:12px;font-weight:700;color:var(--ink2);white-space:nowrap}
.trust-note{
  text-align:center;font-size:12.5px;color:var(--muted);
  margin:14px 0 0;
}
.trust-note b{color:var(--ink2)}
@media(max-width:900px){
  .trust-box{flex-direction:column;align-items:stretch;gap:16px}
  .trust-num{font-size:38px}
  .pwall{grid-template-columns:repeat(5,1fr)}
}
@media(max-width:560px){
  .pwall{grid-template-columns:repeat(3,1fr)}
}
/* 手机端显式断行控制：桌面端隐藏，避免小屏出现"孤字 / 拆词"（如 推|荐度、场|景） */
.mbr{display:none}
@media(max-width:560px){.mbr{display:inline}}

/* ── 区块通用 ── */
.section{padding:84px 0;position:relative}
.section.tight{padding:64px 0}
.sec-head{text-align:center;max-width:660px;margin:0 auto 42px}
.sec-head .kicker{
  font-size:12.5px;font-weight:800;letter-spacing:1.6px;text-transform:uppercase;
  color:var(--cyan);opacity:.9;
}
.sec-head h2{
  margin:12px 0 0;font-size:clamp(23px,3.2vw,34px);font-weight:900;letter-spacing:-.4px;
}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15px}
.grid{display:grid;gap:18px}
.cols-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.cols-3{grid-template-columns:1fr}}

/* ── 三视角 ── */
.persp{
  background:
    radial-gradient(70% 60% at 50% 50%,rgba(122,92,255,.22),transparent 72%),
    linear-gradient(180deg,var(--bg0),var(--bg1));
  overflow:hidden;
}
.persp::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:url("img/globe-space.png");
  background-size:min(760px,88vw) auto;
  background-position:center 58%;
  background-repeat:no-repeat;
  opacity:.26;
  mask-image:radial-gradient(60% 55% at 50% 55%,#000 35%,transparent 78%);
  -webkit-mask-image:radial-gradient(60% 55% at 50% 55%,#000 35%,transparent 78%);
}
.persp > .container{position:relative;z-index:2}
.pcard2{
  background:linear-gradient(160deg,rgba(255,255,255,.095),rgba(255,255,255,.045));
  border:1px solid var(--line2);
  border-radius:var(--radius);
  padding:24px 22px;
  backdrop-filter:blur(10px);
  transition:transform .2s,border-color .2s;
}
.pcard2:hover{transform:translateY(-4px);border-color:var(--line2)}
.phead{display:flex;align-items:center;gap:13px}
.pcard2 .pi{
  width:47px;height:47px;border-radius:13px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,224,255,.1);color:var(--cyan);
  border:1px solid rgba(47,224,255,.22);
}
.pcard2 .pi svg{width:25px;height:25px}
.pcard2 h3{font-size:18px;font-weight:800;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.pcard2 .tag{
  font-size:13px;font-weight:800;letter-spacing:.5px;
  padding:4px 11px;border-radius:8px;
  color:#a9e9ff;background:rgba(47,224,255,.12);
  border:1px solid rgba(47,224,255,.3);
}
.pcard2 .q{
  margin-top:14px;padding:11px 14px;
  background:rgba(14,22,44,.66);
  border-left:2px solid var(--cyan);
  border-radius:0 10px 10px 0;
  font-size:13.5px;line-height:1.65;color:var(--ink2);
}
.pcard2 .imp{margin-top:13px;font-size:13.5px;color:var(--muted)}
.pcard2 .imp b{color:var(--cyan);font-weight:800}
.pcard2 .imp2{margin-top:9px;font-size:12px;line-height:1.6;color:#9fb0d6}
.pcard2 .imp2 b{color:var(--cyan);font-weight:800}

/* ── 六大特色 ── */
.feat-grid{display:grid;gap:14px;grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.feat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.feat-grid{grid-template-columns:1fr}}
.feat{
  position:relative;
  background:linear-gradient(160deg,rgba(255,255,255,.095),rgba(255,255,255,.042));
  border:1px solid var(--line2);
  border-radius:16px;padding:18px;
  transition:transform .2s,border-color .2s,background .2s;
  overflow:hidden;
}
.feat::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,255,.55),transparent);
  opacity:0;transition:opacity .2s;
}
.feat:hover{transform:translateY(-4px);border-color:var(--line2)}
.feat:hover::before{opacity:1}
.feat .fhead{display:flex;align-items:center;gap:12px}
.feat .fic{
  width:44px;height:44px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#05070f;
  box-shadow:0 8px 22px rgba(58,110,255,.35);
}
.feat .fic svg{width:23px;height:23px}
.feat h3{font-size:16.5px;font-weight:800;line-height:1.2}
.feat p{margin-top:10px;font-size:12.5px;color:var(--muted);line-height:1.6}
/* 大屏（≥1200）强制单行不折行；小屏允许自然换行，避免文字被裁切 */
@media(min-width:1200px){
  .feat h3,.feat p{white-space:nowrap}
}

/* ── 表单 ── */
.diag{position:relative;overflow:hidden}
.diag::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(80% 60% at 50% 0%,rgba(47,224,255,.16),transparent 68%);
}
.diag > .container{position:relative;z-index:2}
.form-card{
  max-width:680px;margin:0 auto;
  background:linear-gradient(165deg,rgba(28,38,70,.92),rgba(14,20,40,.94));
  border:1px solid var(--line2);
  border-radius:22px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(16px);
  padding:30px 28px;
}
@media(max-width:560px){.form-card{padding:22px 18px;border-radius:18px}}

.fgroup-title{
  display:flex;align-items:center;gap:9px;
  font-size:14px;font-weight:800;color:var(--ink);
  margin:26px 0 14px;padding-bottom:9px;
  border-bottom:1px solid var(--line);
}
.fgroup-title:first-of-type{margin-top:0}
.fgroup-title span{
  width:21px;height:21px;border-radius:50%;flex-shrink:0;
  background:var(--grad);color:#05070f;
  font-size:12px;font-weight:900;
  display:flex;align-items:center;justify-content:center;
}
.fgroup-title em{font-style:normal;font-weight:500;font-size:12.5px;color:var(--muted);margin-left:auto}

.frow{display:grid;gap:0 16px}
@media(min-width:640px){.frow{grid-template-columns:1fr 1fr}}
.field{margin-bottom:16px}
.field > label{
  display:block;font-size:13.5px;font-weight:700;color:var(--ink2);
  margin-bottom:7px;
}
.hint{font-weight:500;font-size:12px;color:var(--muted);margin-left:5px}
.field input[type="text"],.field input[type="tel"]{
  width:100%;padding:12px 14px;border-radius:11px;
  background:rgba(12,19,38,.68);
  border:1px solid var(--line2);
  color:var(--ink);font-size:14.5px;font-family:inherit;
  transition:border-color .16s,box-shadow .16s;
}
.field input::placeholder{color:#5c6b91}
.field input:focus{
  outline:none;border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,224,255,.14);
}
.field input[type="checkbox"],.field input[type="radio"]{
  width:auto;flex:0 0 auto;padding:0;border:none;background:none;
  accent-color:#2fe0ff;margin:3px 0 0;
}
.tip{margin-top:6px;font-size:12.5px;color:var(--muted);line-height:1.6}
.tip b{color:var(--ink2)}
.area-label{margin-top:12px}

/* 视角选择卡 */
.reg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:560px){.reg-grid{grid-template-columns:1fr}}
.field label.reg-item{
  display:flex;align-items:flex-start;gap:8px;
  font-weight:400;margin-bottom:0;cursor:pointer;
  padding:12px 13px;border-radius:12px;
  background:rgba(255,255,255,.06);
  border:1.5px solid var(--line);
  transition:border-color .16s,background .16s;
}
.field label.reg-item:hover{border-color:var(--line2);background:rgba(255,255,255,.06)}
.field label.reg-item.on{
  border-color:var(--cyan);background:rgba(47,224,255,.08);
  box-shadow:0 0 0 3px rgba(47,224,255,.1);
}
.reg-item b{font-size:13.5px;color:var(--ink);font-weight:700}
.reg-desc{font-size:11.5px;color:var(--muted)}

.code-row{display:flex;gap:10px;align-items:center}
.code-row input{flex:1}
.code-row .btn{margin:0;white-space:nowrap;padding:12px 18px;font-size:14px}

.agree-field{margin:20px 0 16px}
.field label.agree-label{
  display:flex;align-items:flex-start;gap:9px;
  font-weight:400;font-size:12.5px;color:var(--muted);
  cursor:pointer;margin-bottom:0;
}
.agree-label a{color:var(--cyan);border-bottom:1px solid rgba(47,224,255,.4)}
.form-foot{text-align:center;margin-top:14px}
.note{font-size:12.5px;color:var(--muted);line-height:1.6}
.note a{color:var(--cyan)}
.err{color:#ff7b8a;font-size:13px;margin-top:12px;display:none}
.err.show{display:block}
#saved-tip{color:#4be08a}
#saved-tip a{color:#4be08a;font-weight:700}
#open-report-btn{background:linear-gradient(115deg,#2fe0ff,#3d6cff)}

/* ── 页脚 ── */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--bg1),var(--bg0));
  padding:34px 0 26px;
  font-size:13px;color:var(--muted);
}
.site-footer .frow{
  display:flex;gap:14px;flex-wrap:wrap;align-items:center;justify-content:space-between;
  padding-bottom:16px;border-bottom:1px solid rgba(132,162,255,.08);
}
.site-footer a{color:var(--ink2);opacity:.8}
.site-footer a:hover{opacity:1;color:var(--cyan)}
.beian{margin-top:16px;display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:#61708f}
.beian a{color:#7a89a8}
.foot-brand{font-weight:700;color:var(--ink)}

/* ── 入场淡入（加载即播放，不依赖滚动，避免内容被"藏"住）── */
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.reveal{animation:rise .55s cubic-bezier(.2,.75,.3,1) both}
.grid .reveal:nth-child(2){animation-delay:.06s}
.grid .reveal:nth-child(3){animation-delay:.12s}
.feat-grid .reveal:nth-child(2){animation-delay:.04s}
.feat-grid .reveal:nth-child(3){animation-delay:.08s}
.feat-grid .reveal:nth-child(4){animation-delay:.12s}
.feat-grid .reveal:nth-child(5){animation-delay:.16s}
.feat-grid .reveal:nth-child(6){animation-delay:.2s}
@media(prefers-reduced-motion:reduce){.reveal{animation:none}}