/* ============================================================
   IOSeeker · 全站样式 V3
   遵循 IOSeeker_MASTER.md · 色值与几何参数为唯一真源，勿改
   ============================================================ */

:root{
  /* 品牌色 */
  --un-blue:#009EDB;
  --navy:#0B2545;
  --navy-2:#13315C;
  --sky:#5FC8F0;
  --gold:#C9A227;        /* 仅用于成果与荣誉，全页 ≤5% */

  /* 中性色 */
  --ink:#1A1D23;
  --muted:#6B7280;
  --line:#E5E7EB;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;

  /* 形状 */
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 4px 24px rgba(11,37,69,.08);
  --shadow-lg:0 12px 48px rgba(11,37,69,.16);

  /* 间距 */
  --sec:88px;
  --maxw:1140px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}

/* 品牌字体：Noto Sans / 思源黑体。禁止使用 -apple-system 作为首选。 */
body{
  font-family:"Noto Sans SC","Source Han Sans SC","Noto Sans",
              "PingFang SC","Hiragino Sans GB","Microsoft YaHei",
              "Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.center{text-align:center}

/* ---------- NAV ---------- */
header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);
}
header.shrunk{box-shadow:0 1px 16px rgba(11,37,69,.07)}
header.shrunk .nav{height:60px}
header.shrunk .logo img{height:23px}
.nav{
  display:flex;align-items:center;justify-content:space-between;height:68px;
  transition:height .25s cubic-bezier(.2,.7,.3,1);
}
.logo{display:block;flex:none}
.logo img{display:block;height:26px;width:auto;transition:height .25s cubic-bezier(.2,.7,.3,1)}
footer .logo img{height:24px}
.navlinks{display:flex;gap:26px;font-size:15px;color:#374151}
.navlinks a{transition:color .2s}
.navlinks a:hover{color:var(--un-blue)}
.btn{
  display:inline-block;padding:11px 24px;border-radius:999px;font-weight:600;font-size:15px;
  background:var(--un-blue);color:#fff;transition:transform .15s,box-shadow .2s;
  white-space:nowrap;border:0;cursor:pointer;font-family:inherit;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(0,158,219,.35)}
.btn.ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--un-blue);color:var(--un-blue);box-shadow:none}
.btn.lg{padding:15px 34px;font-size:16px}
.btn.block{display:block;width:100%;text-align:center}
.menu-toggle{display:none;background:none;border:0;font-size:24px;color:var(--navy);cursor:pointer}

/* ---------- HERO ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:radial-gradient(1200px 600px at 75% 15%,#1B4C7E 0%,transparent 60%),
             linear-gradient(160deg,var(--navy) 0%,#071A32 100%);
  padding:88px 0 0;
}
.hero::after{ /* 经纬网格纹理 —— 唯一允许的装饰纹理 */
  content:"";position:absolute;inset:0;opacity:.10;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at 70% 10%,#000 0%,transparent 70%);
          mask-image:radial-gradient(ellipse at 70% 10%,#000 0%,transparent 70%);
}
.hero .wrap{position:relative;z-index:1}

/* 双栏：左主张 / 右证据 */
.hero-grid{
  display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;
  min-height:clamp(420px,52vh,540px);
}
/* ⚠️ 必须保留：grid 的 fr 列默认 min-width:auto，
   而 .tk-track 是 width:max-content（轮播轨道很长），
   会把左栏撑爆、把右栏挤成 0。min-width:0 让列可以收缩。 */
.hero-copy{min-width:0}
.hero-proof{min-width:0}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.06em;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);
  padding:7px 16px;border-radius:999px;margin-bottom:26px;color:#CDE8F7;
}
.dot{width:6px;height:6px;border-radius:50%;background:#4ADE80;box-shadow:0 0 0 3px rgba(74,222,128,.25)}
.hero h1{font-size:clamp(32px,4.4vw,52px);line-height:1.2;font-weight:800;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--sky)}
.hero p.sub{margin-top:22px;font-size:clamp(15px,1.5vw,17px);color:#B7CBE0;max-width:52ch}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero .btn.ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.hero .btn.ghost:hover{background:rgba(255,255,255,.08);color:#fff;border-color:#fff}

/* 落地机构轮播 */
.hero-ticker{
  display:flex;align-items:center;gap:14px;margin-top:40px;
  padding-top:24px;border-top:1px solid rgba(255,255,255,.10);
}
.tl-label{
  flex:none;font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:#6E8AA8;
}
.tk{position:relative;overflow:hidden;flex:1;min-width:0;height:22px}
.tk::after{
  content:"";position:absolute;right:0;top:0;bottom:0;width:60px;z-index:2;pointer-events:none;
  background:linear-gradient(270deg,#0C2748,transparent);
}
.tk-track{display:flex;gap:28px;width:max-content;animation:tick 34s linear infinite}
.tk-item{font-size:13.5px;color:#8FA8C2;white-space:nowrap}
.tk-item b{color:var(--sky);font-weight:700;letter-spacing:.01em}
@keyframes tick{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* 证据卡叠层 */
.hero-proof{position:relative;height:400px}
.pcard{
  position:absolute;border-radius:12px;overflow:hidden;background:#fff;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 18px 50px rgba(0,0,0,.36);
  transition:transform .5s cubic-bezier(.2,.7,.3,1);
}
.pcard img{width:100%;height:100%;object-fit:cover;object-position:top center}
.p-back{
  width:60%;height:62%;top:2%;right:2%;transform:rotate(4deg);opacity:.7;
  animation:floatA 9s ease-in-out infinite;
}
.p-mid{
  width:62%;height:66%;top:20%;right:26%;transform:rotate(-3deg);opacity:.9;
  animation:floatB 11s ease-in-out infinite;
}
.p-front{
  width:66%;height:70%;bottom:2%;right:6%;transform:rotate(1.5deg);
  animation:floatC 10s ease-in-out infinite;
}
.hero-proof:hover .p-back{transform:rotate(6deg) translateY(-6px)}
.hero-proof:hover .p-mid{transform:rotate(-5deg) translateY(-4px)}
.hero-proof:hover .p-front{transform:rotate(0deg) translateY(-8px) scale(1.02)}
@keyframes floatA{0%,100%{transform:rotate(4deg) translateY(0)}50%{transform:rotate(4deg) translateY(-9px)}}
@keyframes floatB{0%,100%{transform:rotate(-3deg) translateY(0)}50%{transform:rotate(-3deg) translateY(-6px)}}
@keyframes floatC{0%,100%{transform:rotate(1.5deg) translateY(0)}50%{transform:rotate(1.5deg) translateY(-11px)}}

.pcard-tag{
  position:absolute;top:12px;left:12px;z-index:2;
  font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  background:var(--un-blue);color:#fff;padding:4px 10px;border-radius:6px;
}
.float-chip{
  position:absolute;z-index:3;font-size:12.5px;font-weight:700;
  padding:8px 15px;border-radius:999px;white-space:nowrap;
  box-shadow:0 10px 30px rgba(0,0,0,.3);
}
.gold-chip{
  bottom:12%;left:-4%;background:var(--gold);color:#231A00;  /* 金色：仅用于成果 */
  animation:floatB 8s ease-in-out infinite;
}
.blue-chip{
  top:8%;left:2%;background:#fff;color:var(--navy);
  animation:floatA 10s ease-in-out infinite;
}

/* 数据栏 —— 成功率打头 */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:64px;
  background:rgba(255,255,255,.12);border-radius:var(--radius) var(--radius) 0 0;overflow:hidden;
}
.stat{
  background:#0A2340;padding:28px 18px;text-align:center;
  transition:background .25s;
}
.stat:hover{background:#0D2B4E}
.stat b{
  display:block;font-size:clamp(28px,3.4vw,42px);font-weight:800;color:#fff;
  letter-spacing:-.02em;line-height:1.15;font-variant-numeric:tabular-nums;
}
.stat b span{font-size:.55em;color:var(--sky);margin-left:1px;font-weight:800}
.stat.hl b{color:var(--gold)}          /* 成果高亮：金色，限量使用 */
.stat.hl b span{color:var(--gold)}
.stat small{display:block;font-size:12.5px;color:#8FA8C2;margin-top:6px;letter-spacing:.03em}
.statnote{
  background:#0A2340;border-top:1px solid rgba(255,255,255,.12);
  padding:14px 18px;text-align:center;font-size:12.5px;color:#8FA8C2;line-height:1.7;
}
.statnote strong{color:#B7CBE0;font-weight:600}

/* 向下滚动提示 */
.scroll-cue{
  position:absolute;bottom:132px;left:50%;transform:translateX(-50%);z-index:2;
  width:26px;height:42px;border:1.5px solid rgba(255,255,255,.22);border-radius:999px;
  display:grid;place-items:start center;padding-top:8px;transition:border-color .2s;
}
.scroll-cue:hover{border-color:rgba(255,255,255,.5)}
.cue-line{
  width:2px;height:7px;border-radius:2px;background:var(--sky);
  animation:cue 1.9s ease-in-out infinite;
}
@keyframes cue{
  0%{opacity:0;transform:translateY(0)}
  35%{opacity:1}
  70%{opacity:0;transform:translateY(13px)}
  100%{opacity:0;transform:translateY(13px)}
}

/* ---------- 滚动进场（全站） ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}

@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .tk-track,.p-back,.p-mid,.p-front,.gold-chip,.blue-chip,.cue-line{animation:none}
}

/* ---------- 通用区块 ---------- */
section{padding:var(--sec) 0}
.soft{background:var(--bg-soft)}
.dark{background:var(--navy);color:#fff}
.dark h2{color:#fff}
.dark .lead{color:#B7CBE0}
.dark .tag{color:var(--sky)}
.tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.12em;
  color:var(--un-blue);text-transform:uppercase;margin-bottom:12px;
}
h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.02em;color:var(--navy);line-height:1.3}
.lead{margin-top:14px;color:var(--muted);font-size:17px;max-width:62ch}
.center .lead{margin-left:auto;margin-right:auto}
.head{margin-bottom:48px}
.note{margin-top:22px;font-size:13px;color:var(--muted);text-align:center;line-height:1.8}
.dark .note{color:#7E96AE}

/* ---------- 证据墙 ---------- */
.tabs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:32px}
.tab{
  padding:9px 20px;border-radius:999px;border:1.5px solid var(--line);background:#fff;
  font-size:14.5px;font-weight:600;color:#4B5563;cursor:pointer;transition:.2s;font-family:inherit;
}
.tab:hover{border-color:var(--un-blue);color:var(--un-blue)}
.tab.on{background:var(--navy);border-color:var(--navy);color:#fff}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.shot{
  border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;
  cursor:zoom-in;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;
  aspect-ratio:4/3;
}
.shot:hover{transform:scale(1.02);box-shadow:var(--shadow-lg)}
.shot img{width:100%;height:100%;object-fit:cover;object-position:top center}
.pane{display:none}
.pane.on{display:grid}
.updated{
  display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--muted);
  background:#fff;border:1px solid var(--line);padding:6px 14px;border-radius:999px;margin-top:24px;
}
.updated .dot{background:var(--un-blue);box-shadow:0 0 0 3px rgba(0,158,219,.18)}

/* ---------- 科普板块 ---------- */
.explain{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:e}
.ecard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;
  position:relative;transition:.25s;
}
.ecard:hover{border-color:var(--un-blue);transform:translateY(-3px);box-shadow:var(--shadow)}
.ecard .q{
  font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--un-blue);
  text-transform:uppercase;margin-bottom:10px;
}
.ecard h3{font-size:19px;font-weight:800;color:var(--navy);margin-bottom:10px;line-height:1.4}
.ecard p{font-size:14.5px;color:#4B5563;line-height:1.8}
.ecard strong{color:var(--navy)}

/* ---------- CSC 卖点板块 ---------- */
.csc-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.money{
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);overflow:hidden;
}
.money-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 24px;border-bottom:1px solid rgba(255,255,255,.10);
}
.money-row:last-child{border-bottom:0}
.money-row .lbl{font-size:14.5px;color:#B7CBE0}
.money-row .val{font-size:20px;font-weight:800;color:#fff;letter-spacing:-.01em;white-space:nowrap}
.money-row.total{background:rgba(201,162,39,.10)}
.money-row.total .lbl{color:#EBD98F;font-weight:600}
.money-row.total .val{color:var(--gold);font-size:24px}
.money-row.dim .val{color:#7E96AE;font-weight:600;font-size:16px}
.cmp{
  display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px;
}
.cmp-box{
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-sm);padding:18px 20px;
}
.cmp-box small{display:block;font-size:12.5px;color:#8FA8C2;margin-bottom:6px}
.cmp-box b{font-size:19px;font-weight:800;color:#fff}
.cmp-box.gold b{color:var(--gold)}
.srclink{
  display:inline-flex;align-items:center;gap:6px;margin-top:22px;
  font-size:13.5px;color:var(--sky);border-bottom:1px solid rgba(95,200,240,.4);padding-bottom:2px;
}
.srclink:hover{color:#fff;border-color:#fff}

/* ---------- 时间线 ---------- */
.tl{position:relative;margin-top:12px}
.tl::before{
  content:"";position:absolute;left:0;right:0;top:23px;height:2px;
  background:linear-gradient(90deg,var(--un-blue),var(--sky));opacity:.35;
}
.tl-row{display:grid;grid-template-columns:repeat(8,1fr);gap:10px;position:relative}
.tl-step{text-align:left;padding-right:8px}
.tl-step .n{
  width:46px;height:46px;border-radius:50%;background:#fff;border:2px solid var(--un-blue);
  color:var(--navy);display:grid;place-items:center;font-weight:800;font-size:15px;
  margin-bottom:14px;position:relative;z-index:1;
}
.tl-step h4{font-size:14.5px;color:var(--navy);font-weight:800;margin-bottom:5px;line-height:1.4}
.tl-step p{font-size:12.5px;color:var(--muted);line-height:1.65}
.windows{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:52px}
.win{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--un-blue);
  border-radius:var(--radius-sm);padding:22px 24px;
}
.win.alt{border-left-color:var(--navy-2)}
.win h4{font-size:16px;font-weight:800;color:var(--navy);margin-bottom:6px}
.win p{font-size:14px;color:#4B5563;line-height:1.75}
.win b{color:var(--un-blue)}
.win.alt b{color:var(--navy-2)}

/* ---------- 服务卡 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;
  transition:transform .25s,box-shadow .25s,border-color .25s;position:relative;overflow:hidden;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.card .ribbon{position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--un-blue),var(--sky))}
.card.gold .ribbon{background:linear-gradient(90deg,var(--gold),#E5C55C)}
.card.navy .ribbon{background:linear-gradient(90deg,var(--navy-2),#3B6FA8)}
.card h3{font-size:20px;font-weight:800;color:var(--navy);margin-bottom:6px}
.card .kicker{font-size:13px;color:var(--un-blue);font-weight:600;margin-bottom:16px}
.card.gold .kicker{color:#9A7B0E}
.card ul{list-style:none;font-size:14.5px;color:#4B5563}
.card li{padding:7px 0 7px 24px;position:relative;border-bottom:1px dashed #EEF1F5}
.card li:last-child{border-bottom:0}
.card li::before{
  content:"";position:absolute;left:4px;top:15px;width:7px;height:7px;border-radius:50%;
  background:var(--un-blue);opacity:.5;
}
.card .foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
.card .foot a{font-size:14px;font-weight:700;color:var(--un-blue)}

/* 增值服务 */
.addon{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  display:flex;gap:20px;align-items:flex-start;transition:.25s;
}
.addon:hover{border-color:var(--un-blue);box-shadow:var(--shadow)}
.addon .ico{
  flex:none;width:44px;height:44px;border-radius:10px;background:#E6F6FD;
  display:grid;place-items:center;
}
.addon .ico svg{width:22px;height:22px;stroke:var(--un-blue);stroke-width:2;fill:none}
.addon h3{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:8px}
.addon p{font-size:14.5px;color:#4B5563;line-height:1.8}

/* ---------- 弹幕好评 ---------- */
/* min-width:0 同理：.mq-track 是 max-content，不加会撑破容器 */
.marquee{overflow:hidden;position:relative;padding:6px 0;min-width:0;max-width:100%}
.marquee::before,.marquee::after{
  content:"";position:absolute;top:0;bottom:0;width:120px;z-index:2;pointer-events:none;
}
.marquee::before{left:0;background:linear-gradient(90deg,var(--bg-soft),transparent)}
.marquee::after{right:0;background:linear-gradient(270deg,var(--bg-soft),transparent)}
.mq-track{display:flex;gap:16px;width:max-content;animation:slide 60s linear infinite}
.marquee:hover .mq-track{animation-play-state:paused}
.mq-track.rev{animation-direction:reverse;animation-duration:72s;margin-top:16px}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.bullet{
  flex:none;width:330px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;box-shadow:0 1px 3px rgba(11,37,69,.04);
}
.bullet .who{display:flex;align-items:center;gap:9px;margin-bottom:9px}
.bullet .av{
  width:28px;height:28px;border-radius:50%;background:var(--navy);color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:700;flex:none;
}
.bullet .nm{font-size:13px;font-weight:700;color:var(--navy)}
.bullet .mt{font-size:12px;color:var(--muted)}
.bullet p{font-size:13.5px;color:#4B5563;line-height:1.7}
@media(prefers-reduced-motion:reduce){.mq-track{animation:none}}

/* ---------- 案例表 ---------- */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:720px}
th{
  background:var(--navy);color:#fff;font-weight:600;text-align:left;padding:14px 18px;
  font-size:13px;letter-spacing:.04em;white-space:nowrap;
}
td{padding:14px 18px;border-bottom:1px solid #F0F2F5;color:#374151}
tbody tr:hover{background:#F8FBFE}
tbody tr:last-child td{border-bottom:0}
.pill{
  display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;
  background:#E6F6FD;color:#0369A1;white-space:nowrap;
}
.pill.g{background:#FDF6E3;color:#8A6D0B}
.pill.n{background:#F3F4F6;color:#6B7280}

/* ---------- 团队 ---------- */
.team-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  padding:8px 15px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--line);
  font-size:13.5px;color:#374151;font-weight:500;
}
.badge b{color:var(--navy)}
.photos{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.photo{
  aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:var(--bg-soft);display:grid;place-items:center;
}
.photo img{width:100%;height:100%;object-fit:cover}
.photo.tall{grid-row:span 2;aspect-ratio:auto}
.ph-empty{
  color:#9AA5B1;font-size:12.5px;text-align:center;padding:16px;line-height:1.6;
  border:1px dashed var(--line);border-radius:var(--radius);width:100%;height:100%;
  display:grid;place-items:center;
}
.orglist{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
.org{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 8px;text-align:center;
  font-weight:700;color:var(--navy);font-size:14px;letter-spacing:.02em;transition:.2s;
}
.org:hover{border-color:var(--un-blue);color:var(--un-blue);transform:translateY(-2px)}

/* ---------- 文章专栏 ---------- */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:.25s;
}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
.post .cover{aspect-ratio:16/9;background:var(--bg-soft);border-bottom:1px solid var(--line);overflow:hidden}
.post .cover img{width:100%;height:100%;object-fit:cover}
.post .body{padding:24px;display:flex;flex-direction:column;flex:1}
.post .cat{
  font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--un-blue);
  text-transform:uppercase;margin-bottom:10px;
}
.post .cat.story{color:var(--gold)}
.post h3{font-size:18px;font-weight:800;color:var(--navy);line-height:1.45;margin-bottom:10px}
.post p{font-size:14px;color:var(--muted);line-height:1.75;flex:1}
.post .meta{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted);
}
.post .meta b{color:var(--navy);font-weight:700}

/* ---------- 资源包 ---------- */
.res-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.res-list{list-style:none}
.res-list li{
  display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line);
  font-size:15px;color:#374151;
}
.res-list li:last-child{border-bottom:0}
.res-list svg{width:18px;height:18px;stroke:var(--un-blue);stroke-width:2;fill:none;flex:none}

/* ---------- 表单 ---------- */
.formcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:36px;box-shadow:var(--shadow);
}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{
  display:block;font-size:13.5px;font-weight:700;color:var(--navy);margin-bottom:7px;
}
.field label .req{color:var(--un-blue);margin-left:3px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--un-blue);
}
.field .hint{font-size:12px;color:var(--muted);margin-top:5px}
.formnote{font-size:12.5px;color:var(--muted);text-align:center;margin-top:14px;line-height:1.7}
.formmsg{
  display:none;padding:14px 18px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:16px;
}
.formmsg.err{display:block;background:#FEF2F2;color:#B91C1C;border:1px solid #FECACA}
.formmsg.ok{display:block;background:#ECFDF5;color:#047857;border:1px solid #A7F3D0}

/* 提交后二维码弹窗 */
.modal{
  position:fixed;inset:0;z-index:999;background:rgba(6,20,38,.94);display:none;
  place-items:center;padding:32px;
}
.modal.on{display:grid}
.modal-box{
  background:#fff;border-radius:var(--radius);padding:40px;max-width:420px;text-align:center;
}
.modal-box h3{font-size:22px;font-weight:800;color:var(--navy);margin-bottom:10px}
.modal-box p{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:24px}
.modal-box .qr{
  width:200px;height:200px;margin:0 auto 18px;border-radius:var(--radius-sm);
  border:1px dashed var(--line);background:var(--bg-soft);
  display:grid;place-items:center;color:#9AA5B1;font-size:12.5px;padding:16px;line-height:1.6;
}
.modal-box .qr img{width:100%;height:100%;object-fit:contain}
.modal-box small{display:block;color:var(--muted);font-size:12.5px}
.modal .x{position:absolute;top:22px;right:28px;color:#fff;font-size:34px;line-height:1;opacity:.7;cursor:pointer}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
details[open]{border-color:var(--un-blue);box-shadow:var(--shadow)}
summary{
  padding:20px 24px;font-weight:700;color:var(--navy);cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:16px;
}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:22px;color:var(--un-blue);font-weight:400;flex:none}
details[open] summary::after{content:"−"}
details p{padding:0 24px 22px;color:#4B5563;font-size:15px}
details p + p{padding-top:0}

/* ---------- FOOT ---------- */
footer{background:#061426;color:#8FA8C2;padding:56px 0 32px;font-size:13.5px}
.fgrid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;
  padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.08);
}
footer h5{color:#fff;font-size:14px;margin-bottom:14px;font-weight:700}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a:hover{color:var(--un-blue)}
.qual{list-style:none;font-size:12.5px;line-height:1.9;color:#7E96AE}
.qual li{margin-bottom:4px}
.qual b{color:#B7CBE0;font-weight:600}
.legal{padding-top:26px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12.5px;color:#5B7391}
.disclaimer{color:#5B7391}

/* ---------- LIGHTBOX ---------- */
.lb{
  position:fixed;inset:0;z-index:999;background:rgba(6,20,38,.94);display:none;
  place-items:center;padding:32px;cursor:zoom-out;
}
.lb.on{display:grid}
.lb img{max-width:min(1000px,92vw);max-height:88vh;object-fit:contain;border-radius:8px;box-shadow:0 24px 80px rgba(0,0,0,.5)}
.lb .x{position:absolute;top:22px;right:28px;color:#fff;font-size:34px;line-height:1;opacity:.7}

/* ---------- 文章页 ---------- */
.article{max-width:720px;margin:0 auto;padding:64px 24px 88px}
.article .back{font-size:14px;color:var(--un-blue);font-weight:600;display:inline-block;margin-bottom:28px}
.article .cat{font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--un-blue);text-transform:uppercase}
.article h1{font-size:clamp(28px,4vw,40px);font-weight:800;color:var(--navy);letter-spacing:-.02em;line-height:1.3;margin:12px 0 20px}
.byline{
  display:flex;align-items:center;gap:12px;padding:16px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:36px;
}
.byline .av{
  width:40px;height:40px;border-radius:50%;background:var(--navy);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:15px;flex:none;
}
.byline .info{flex:1}
.byline .info b{display:block;font-size:14.5px;color:var(--navy)}
.byline .info small{font-size:12.5px;color:var(--muted)}
.byline .xhs{
  font-size:13px;font-weight:700;color:#FF2442;border:1.5px solid #FFD4DB;
  padding:7px 14px;border-radius:999px;transition:.2s;white-space:nowrap;
}
.byline .xhs:hover{background:#FFF1F3;border-color:#FF2442}
.prose{font-size:16.5px;line-height:1.9;color:#374151}
.prose h2{font-size:24px;margin:44px 0 16px}
.prose h3{font-size:19px;font-weight:800;color:var(--navy);margin:32px 0 12px}
.prose p{margin-bottom:20px}
.prose ul,.prose ol{margin:0 0 20px 22px}
.prose li{margin-bottom:8px}
.prose strong{color:var(--navy);font-weight:700}
.prose blockquote{
  border-left:3px solid var(--un-blue);background:var(--bg-soft);
  padding:18px 22px;margin:26px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:#4B5563;font-size:15.5px;
}
.prose table{min-width:0;margin-bottom:24px}
.article-cta{
  margin-top:56px;padding:32px;background:var(--bg-soft);border:1px solid var(--line);
  border-radius:var(--radius);text-align:center;
}
.article-cta h3{font-size:20px;font-weight:800;color:var(--navy);margin-bottom:8px}
.article-cta p{font-size:14.5px;color:var(--muted);margin-bottom:20px}

/* ---------- RESPONSIVE ---------- */
@media(max-width:1100px){
  .hero-grid{gap:36px}
  .hero-proof{height:340px}
}
@media(max-width:1000px){
  .tl-row{grid-template-columns:repeat(4,1fr);row-gap:32px}
  .tl::before{display:none}
  .explain{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:960px){
  /* Hero 单栏：证据叠层降为横向条带，不占据首屏高度 */
  .hero-grid{grid-template-columns:1fr;gap:44px;min-height:0}
  .hero p.sub{max-width:none}
  .hero-proof{height:230px;max-width:420px;margin:0 auto}
  .p-back{width:52%;height:74%;top:4%;right:0}
  .p-mid{width:54%;height:80%;top:10%;right:24%}
  .p-front{width:56%;height:86%;bottom:0;right:6%}
  .gold-chip{left:0;bottom:6%}
  .blue-chip{left:6%;top:2%}
  .scroll-cue{display:none}

  .grid-3,.grid-2,.posts{grid-template-columns:1fr}
  .team-grid,.csc-grid,.res-grid{grid-template-columns:1fr;gap:36px}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .fgrid{grid-template-columns:1fr 1fr;gap:28px}
  .windows{grid-template-columns:1fr}
}
@media(max-width:680px){
  section{padding:60px 0}
  .hero{padding-top:56px}
  .navlinks{
    display:none;position:absolute;top:68px;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;padding:8px 24px 20px;border-bottom:1px solid var(--line);
  }
  .navlinks.open{display:flex}
  .navlinks a{padding:13px 0;border-bottom:1px solid var(--line)}
  .menu-toggle{display:block}
  .nav > .btn{display:none}
  .tl-row{grid-template-columns:repeat(2,1fr)}
  .explain{grid-template-columns:1fr}
  .frow{grid-template-columns:1fr;gap:0}
  .fgrid{grid-template-columns:1fr}
  .hero-cta .btn{flex:1;text-align:center}
  .hero-ticker{margin-top:30px;padding-top:20px}
  .hero-proof{height:190px;max-width:330px}
  .float-chip{font-size:11.5px;padding:7px 12px}
  .formcard{padding:24px}
  .bullet{width:280px}
  .cmp{grid-template-columns:1fr}
}
@media(max-width:420px){
  .hero-proof{display:none}   /* 极窄屏：证据叠层让位给文案与 CTA */
}