:root{
  --pri:#0e4d6b; --pri-d:#073449; --pri-l:#1a6b8a;
  --accent:#e8833a; --accent-d:#c96a1f; --accent-l:#fbeede;
  --ink:#16242f; --muted:#56697a; --faint:#8295a3;
  --bg:#f4f8fb; --bg2:#eaf1f7;
  --card:#ffffff; --line:#e2e9f0;
  --sh-sm:0 1px 2px rgba(15,45,65,.06);
  --sh:0 6px 20px rgba(15,45,65,.08);
  --sh-lg:0 18px 44px rgba(15,45,65,.14);
  --radius:16px; --radius-sm:10px;
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;color:var(--ink);line-height:1.75;background:var(--card);-webkit-font-smoothing:antialiased;font-size:16px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:var(--pri-l);text-decoration:none}
img{max-width:100%}
section{padding:64px 0}
section.alt{background:var(--bg)}
h2.sec{font-size:28px;color:var(--pri-d);letter-spacing:.5px;margin-bottom:6px;font-weight:800}
h2.sec.center{text-align:center}
.lead{color:var(--muted);max-width:740px;margin-bottom:34px;font-size:16.5px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--accent-d);background:var(--accent-l);padding:4px 12px;border-radius:20px;letter-spacing:1px;margin-bottom:14px}
.grid{display:grid;gap:22px}
.grid.cols3{grid-template-columns:repeat(3,1fr)}
.grid.cols2{grid-template-columns:repeat(2,1fr)}

.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px;font-size:19px;font-weight:800;color:var(--pri-d);text-decoration:none}
.brand::before{content:"";width:36px;height:36px;border-radius:10px;flex-shrink:0;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop offset='0' stop-color='%231a6b8a'/%3E%3Cstop offset='1' stop-color='%23073449'/%3E%3C/linearGradient%3E%3C/defs%3E%3Crect width='32' height='32' rx='8' fill='url(%23g)'/%3E%3Cpath d='M16 7l9 10h-5.5v8h-7v-8H7z' fill='%23fff'/%3E%3C/svg%3E");background-size:contain;box-shadow:var(--sh-sm)}
.brand span{display:block;font-size:11.5px;color:var(--faint);font-weight:500;letter-spacing:1px}
.main-nav{display:flex;gap:22px;flex-wrap:wrap}
.main-nav a{color:var(--ink);text-decoration:none;font-size:15px;font-weight:500;transition:color .2s}
.main-nav a:hover{color:var(--accent-d)}

.hero{background:linear-gradient(135deg,#073449 0%,#0e4d6b 55%,#1a6b8a 100%);color:#fff;padding:74px 0 96px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 85% 12%,rgba(232,131,58,.28),transparent 42%);pointer-events:none}
.hero .container{position:relative}
.hero h1{font-size:40px;line-height:1.25;margin-bottom:16px;font-weight:800;letter-spacing:.5px}
.hero p{font-size:17.5px;opacity:.95;max-width:660px;margin-bottom:26px}
.hero strong{color:#ffd9b0}
.btn{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;padding:13px 30px;border-radius:10px;text-decoration:none;font-weight:700;font-size:15px;box-shadow:0 8px 20px rgba(232,131,58,.3);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(232,131,58,.42)}
.btn.ghost{background:rgba(255,255,255,.14);box-shadow:none;border:1px solid rgba(255,255,255,.4)}
.btn.ghost:hover{background:rgba(255,255,255,.24)}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--sh);overflow:hidden;margin-top:-48px;position:relative;z-index:2}
.stat{padding:26px 18px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat b{display:block;font-size:30px;color:var(--pri-d);font-weight:800;line-height:1}
.stat span{display:block;margin-top:8px;font-size:14px;color:var(--muted)}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--sh-sm);transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:#cfe0ec}
.card h3{color:var(--pri-d);margin-bottom:9px;font-size:18px;font-weight:700}
.card p{color:var(--muted);font-size:14.5px}
.card .num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--pri-l),var(--pri));color:#fff;font-weight:800;margin-bottom:12px;font-size:15px}
.card .icon{width:46px;height:46px;border-radius:12px;background:var(--accent-l);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.card .icon svg{width:24px;height:24px}

.tag{display:inline-block;background:#e2f0f7;color:#0e4d6b;padding:3px 11px;border-radius:20px;font-size:12.5px;margin:2px;font-weight:600}
.case-badge{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;padding:4px 12px;border-radius:8px;font-weight:800;font-size:14px;margin-bottom:8px}

table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--sh-sm)}
th,td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
th{background:var(--bg2);color:var(--pri-d);font-weight:700}
tbody tr:hover{background:#f9fbfd}
tr:last-child td{border-bottom:none}

.note{background:linear-gradient(135deg,#fffbeb,#fef3d9);border:1px solid #fde68a;color:#92400e;padding:15px 19px;border-radius:var(--radius-sm);font-size:14.5px;margin:16px 0;line-height:1.7}
.note strong{color:#7c2d12}
.placeholder{color:#b45309;background:#fff7ed;padding:1px 7px;border-radius:5px;font-size:13px;font-weight:600}
dl.kv{display:grid;grid-template-columns:170px 1fr;gap:10px 22px;font-size:15px}
dl.kv dt{color:var(--faint);font-weight:600}
dl.kv dd{color:var(--ink)}

.trust-band{background:linear-gradient(135deg,var(--bg),var(--bg2));border:1px solid var(--line);border-radius:var(--radius);padding:28px 32px;display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.trust-band .ico{width:54px;height:54px;border-radius:14px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:var(--sh-sm)}
.trust-band .ico svg{width:28px;height:28px}
.trust-band h3{color:var(--pri-d);margin-bottom:4px;font-size:18px}
.trust-band p{color:var(--muted);font-size:14.5px;margin:0}

.site-footer{background:linear-gradient(135deg,#073449,#042130);color:#cfe1ec;padding:48px 0 28px;margin-top:24px}
.foot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.site-footer h4{color:#fff;margin-bottom:12px;font-size:16px;font-weight:700}
.site-footer p{font-size:14px;color:#a9c4d4;line-height:1.9}
.copy{border-top:1px solid rgba(255,255,255,.13);margin-top:30px;padding-top:18px;font-size:12.5px;color:#7fa0b2;line-height:1.7}

@media(max-width:880px){.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:none}.stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}}
@media(max-width:760px){.hero{padding:54px 0 74px}.hero h1{font-size:27px}.grid.cols3,.grid.cols2,.foot-grid{grid-template-columns:1fr}.main-nav{gap:14px}dl.kv{grid-template-columns:1fr}section{padding:46px 0}}

.accent-band{background:linear-gradient(120deg,#073449,#0e4d6b 60%,#1a6b8a);color:#fff;border-radius:16px;padding:34px 36px;display:flex;gap:22px;align-items:center;flex-wrap:wrap;box-shadow:0 18px 44px rgba(15,45,65,.14);position:relative;overflow:hidden;margin-bottom:8px}
.accent-band::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 88% 18%,rgba(232,131,58,.32),transparent 45%);pointer-events:none}
.accent-band>*{position:relative;z-index:1}
.accent-band .ico{width:60px;height:60px;border-radius:16px;background:rgba(255,255,255,.16);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.accent-band .ico svg{width:32px;height:32px}
.accent-band h3{color:#fff;font-size:20px;margin-bottom:6px;font-weight:800}
.accent-band p{color:#d7e8f0;font-size:15px;margin:0;line-height:1.7}
.accent-band b{color:#ffd9b0}

/* ============ 手机端优化 ============ */
@media (max-width:760px){
  /* 导航：品牌在上，菜单在下，横向可滚动不换行错乱 */
  .nav{height:auto;padding:10px 0;flex-direction:column;align-items:stretch;gap:8px}
  .brand{justify-content:center;font-size:18px}
  .brand::before{width:32px;height:32px}
  .main-nav{gap:0;justify-content:space-between;width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .main-nav a{font-size:13px;padding:6px 4px;white-space:nowrap;flex:0 0 auto;text-align:center}

  /* hero 更紧凑 */
  .hero{padding:44px 0 60px}
  .hero h1{font-size:24px}
  .hero p{font-size:15.5px}
  .btn{padding:11px 22px;font-size:14px}

  /* 数据带：2x2，间距更舒服 */
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-40px}
  .stat{padding:20px 10px}
  .stat b{font-size:26px}

  /* 卡片内边距收紧 */
  .card{padding:20px}
  section{padding:40px 0}

  /* 信任带/强调带 纵向 */
  .trust-band,.accent-band{flex-direction:column;text-align:center;align-items:center;padding:22px 20px}
  .trust-band .ico,.accent-band .ico{width:48px;height:48px}
}

/* 案例表格：手机端转成卡片堆叠（关键修复） */
@media (max-width:760px){
  table{width:100%}
  table thead{display:none}
  tbody,tr,td{display:block;width:100%}
  table tr{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;padding:10px 14px;box-shadow:var(--sh-sm)}
  table tr:last-child{margin-bottom:0}
  table td{display:flex;justify-content:space-between;gap:12px;border:none;padding:6px 0;font-size:14px;text-align:right}
  table td::before{content:attr(data-label);color:var(--faint);font-weight:600;text-align:left;flex:0 0 auto}
  table td:first-child{font-weight:700;color:var(--pri-d);font-size:15px;border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:4px;justify-content:flex-start}
  table td:first-child::before{display:none}
}