/* ============================================================
   企业展示站样式（前台独立，与后台 style.css 互不影响）
   深蓝大气主色 + 金色点缀，全站响应式
   ============================================================ */
:root {
    --navy: #0b2559;
    --navy-deep: #071a3f;
    --brand: #1d4ed8;
    --gold: #f5b301;
    --ink: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --bg: #f6f8fb;
    --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; color: var(--ink); background: #fff; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: 90%; max-width: 1600px; margin: 0 auto; padding: 0 20px; }
.center { text-align: center; }
.empty { text-align: center; color: #9ca3af; padding: 40px 0; grid-column: 1/-1; }

/* ---------- 顶部导航 ---------- */
.topbar { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.topbar-in { display: flex; align-items: center; gap: 26px; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: var(--navy); }
.logo-mark { width: 34px; height: 34px; border-radius: 9px; background: linear-gradient(135deg, var(--navy), var(--brand)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 17px; }
.topnav { display: flex; gap: 4px; margin-left: auto; }
.topnav a { padding: 8px 14px; border-radius: 8px; font-size: 14.5px; color: var(--ink); transition: background .15s, color .15s; }
.topnav a:hover { background: #eef2ff; color: var(--brand); }
.top-cta { background: var(--navy); color: #fff; padding: 9px 18px; border-radius: 9px; font-size: 14px; white-space: nowrap; transition: opacity .15s; }
.top-cta:hover { opacity: .88; }
.nav-toggle { display: none; margin-left: auto; border: none; background: none; font-size: 26px; color: var(--navy); cursor: pointer; }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 55%, #14357d 100%); color: #fff; padding: 84px 0 0; }
.hero-tag { display: inline-block; border: 1px solid rgba(255,255,255,.35); border-radius: 999px; padding: 5px 16px; font-size: 13px; letter-spacing: 2px; color: #ffd970; margin-bottom: 22px; }
.hero h1 { font-size: 40px; line-height: 1.3; font-weight: 800; margin-bottom: 14px; }
.hero h1 span { display: block; font-size: 22px; font-weight: 500; color: #c7d4f5; margin-top: 8px; }
.hero-p { max-width: 640px; color: #aab8dd; font-size: 15.5px; margin-bottom: 30px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 64px; }
.btn-hero { display: inline-block; background: var(--gold); color: #3a2a00; font-weight: 700; font-size: 15px; padding: 13px 32px; border-radius: 10px; border: none; cursor: pointer; transition: transform .15s, filter .15s; }
.btn-hero:hover { transform: translateY(-2px); filter: brightness(1.05); }
.btn-hero.ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.5); font-weight: 500; }
.btn-hero.ghost:hover { background: rgba(255,255,255,.1); }
.btn-hero.full { width: 100%; text-align: center; }
.btn-line { display: inline-block; border: 1.5px solid var(--navy); color: var(--navy); padding: 10px 28px; border-radius: 10px; font-size: 14.5px; transition: all .15s; }
.btn-line:hover { background: var(--navy); color: #fff; }

/* 数据条（叠压 hero 底部） */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; transform: translateY(50%); margin-top: -50px; position: relative; z-index: 5; padding-bottom: 50px; }
.st { background: #fff; border-radius: var(--radius); box-shadow: 0 12px 30px rgba(11,37,89,.12); padding: 22px 10px; text-align: center; }
.st b { display: block; font-size: 28px; font-weight: 800; color: var(--navy); }
.st span { font-size: 13px; color: var(--muted); }

/* ---------- 通用 Section ---------- */
.sec { padding: 90px 0 70px; margin-top: 50px; }
.sec:first-of-type { margin-top: 0; }
.sec.alt { background: var(--bg); }
.sec-head { text-align: center; margin-bottom: 44px; }
.sec-head.left { text-align: left; }
.sec-head h2 { font-size: 30px; font-weight: 800; color: var(--navy); }
.sec-head h2::after { content: ""; display: block; width: 46px; height: 4px; background: var(--gold); border-radius: 2px; margin: 14px auto 0; }
.sec-head.left h2::after { margin-left: 0; }
.sec-head p { color: var(--muted); font-size: 14.5px; margin-top: 12px; }

/* ---------- 服务 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.svc { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 22px; transition: transform .18s, box-shadow .18s; }
.svc:hover { transform: translateY(-5px); box-shadow: 0 16px 34px rgba(11,37,89,.12); border-color: transparent; }
.svc-icon { width: 52px; height: 52px; border-radius: 13px; background: #eef2ff; display: flex; align-items: center; justify-content: center; font-size: 25px; margin-bottom: 16px; }
.svc h3 { font-size: 17px; color: var(--navy); margin-bottom: 8px; }
.svc p { font-size: 13.5px; color: var(--muted); min-height: 66px; }
.svc-price { font-size: 14px; font-weight: 700; color: #b45309; border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 12px; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); display: flex; flex-direction: column; transition: transform .18s, box-shadow .18s; }
.case:hover { transform: translateY(-5px); box-shadow: 0 18px 38px rgba(11,37,89,.14); }
.case-cover { aspect-ratio: 16/10; overflow: hidden; background: #dfe6f3; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.case:hover .case-cover img { transform: scale(1.04); }
.case-cover.ph { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--navy), #2b57b8); }
.case-cover.ph span { color: rgba(255,255,255,.85); font-size: 54px; font-weight: 800; }
.case-body { padding: 20px 20px 22px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.case-meta { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--muted); }
.tag { background: #eef2ff; color: var(--brand); font-size: 12px; padding: 3px 10px; border-radius: 999px; white-space: nowrap; }
.case h3 { font-size: 16px; color: var(--ink); line-height: 1.5; }
.case p { font-size: 13.5px; color: var(--muted); flex: 1; }
.case-more { font-size: 13.5px; color: var(--brand); font-weight: 600; }

/* 分类筛选 */
.filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.f-chip { padding: 8px 18px; border-radius: 999px; border: 1px solid var(--line); font-size: 13.5px; color: var(--muted); transition: all .15s; }
.f-chip:hover { border-color: var(--brand); color: var(--brand); }
.f-chip.on { background: var(--navy); border-color: var(--navy); color: #fff; }

/* ---------- 报价 ---------- */
.price-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: 0 6px 24px rgba(11,37,89,.07); }
.price-table th { background: var(--navy); color: #fff; text-align: left; padding: 14px 20px; font-size: 14.5px; font-weight: 600; }
.price-table td { padding: 16px 20px; border-bottom: 1px solid #eef1f6; font-size: 14px; vertical-align: top; }
.price-table tr:last-child td { border-bottom: none; }
.price-table tr:hover td { background: #f8faff; }
.p-num { font-weight: 700; color: #b45309; white-space: nowrap; }
.quote-note { text-align: center; color: var(--muted); font-size: 13px; margin-top: 20px; }

/* ---------- 关于 ---------- */
.about { max-width: 860px; margin: 0 auto; background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 40px 44px; font-size: 15.5px; color: #374151; }

/* ---------- 联系 + 询价表单 ---------- */
.contact-in { display: grid; grid-template-columns: 1fr 420px; gap: 50px; align-items: start; }
.c-list { display: grid; gap: 14px; }
.c-item { display: flex; gap: 16px; align-items: baseline; border-bottom: 1px dashed var(--line); padding-bottom: 12px; }
.c-item b { color: var(--navy); font-size: 14.5px; min-width: 72px; }
.c-item span { color: #374151; font-size: 15px; }
.quote-form { background: #fff; border-radius: var(--radius); box-shadow: 0 14px 40px rgba(11,37,89,.12); padding: 30px 28px; display: grid; gap: 13px; }
.quote-form h3 { color: var(--navy); font-size: 19px; margin-bottom: 4px; }
.quote-form input, .quote-form select, .quote-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 9px; padding: 11px 14px; font-size: 14px; font-family: inherit; outline: none; transition: border .15s; }
.quote-form input:focus, .quote-form select:focus, .quote-form textarea:focus { border-color: var(--brand); }
.quote-form .hp { position: absolute; left: -9999px; }
.form-tip { font-size: 12px; color: #9ca3af; text-align: center; }
.ok-bar { background: #ecfdf5; border: 1px solid #a7f3d0; color: #047857; border-radius: 10px; padding: 12px 18px; margin: 18px auto; font-size: 14px; }

/* ---------- 内页头 ---------- */
.page-hero { background: linear-gradient(135deg, var(--navy-deep), var(--navy)); color: #fff; padding: 56px 0; }
.page-hero.small { padding: 44px 0; }
.page-hero h1 { font-size: 30px; font-weight: 800; }
.page-hero p { color: #aab8dd; margin-top: 8px; font-size: 14.5px; }
.crumb { font-size: 13px; color: #8ea3cf; margin-bottom: 14px; }
.crumb a { color: #c7d4f5; }
.crumb a:hover { color: #fff; }

/* ---------- 案例详情 ---------- */
.case-detail { max-width: 900px; }
.case-detail .case-cover { border-radius: var(--radius); overflow: hidden; margin-bottom: 30px; aspect-ratio: 16/9; }
.case-detail .case-cover.ph { aspect-ratio: 16/9; }
.results { background: #f0f6ff; border-left: 4px solid var(--gold); border-radius: 0 12px 12px 0; padding: 22px 26px; margin-bottom: 26px; }
.results h3 { color: var(--navy); font-size: 16px; margin-bottom: 10px; }
.results ul { list-style: none; display: grid; gap: 7px; }
.results li::before { content: "✓"; color: #059669; font-weight: 800; margin-right: 9px; }
.case-content { font-size: 15.5px; color: #374151; margin-bottom: 26px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-deep); color: #93a5cd; margin-top: 90px; padding: 46px 0 26px; font-size: 13.5px; }
.foot-in { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 26px; border-bottom: 1px solid rgba(255,255,255,.1); }
.f-name { color: #fff; font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.f-slogan { max-width: 420px; }
.f-contact { display: grid; gap: 6px; }
.f-icp { text-align: center; padding-top: 20px; font-size: 12.5px; color: #6d80ab; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .svc-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-in { grid-template-columns: 1fr; }
    .hero h1 { font-size: 32px; }
}
@media (max-width: 620px) {
    .topnav { display: none; position: absolute; top: 66px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; padding: 10px 20px; }
    .topnav.open { display: flex; }
    .topnav a { padding: 11px 4px; }
    .nav-toggle { display: block; }
    .top-cta { display: none; }
    .stats { grid-template-columns: repeat(2, 1fr); }
    .svc-grid, .case-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 26px; }
    .hero h1 span { font-size: 17px; }
    .sec { padding: 60px 0 50px; }
    .about { padding: 26px 22px; }
}

/* ---- v7: 友情链接 ---- */
.f-links{padding-top:14px;margin-top:14px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12.5px;color:rgba(255,255,255,.55);display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center}
.f-links-t{font-weight:600;color:rgba(255,255,255,.7)}
.f-links a{color:rgba(255,255,255,.65);text-decoration:none}
.f-links a:hover{color:#f5c518;text-decoration:underline}

/* ---- v8: GEO 平台介绍区块 ---- */
.plat-band{background:linear-gradient(135deg,#0b1e3f 0%,#123061 55%,#0d254d 100%);padding:72px 0;color:#fff}
.plat-in{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.plat-badge{display:inline-block;background:rgba(245,197,24,.15);color:#f5c518;border:1px solid rgba(245,197,24,.4);
  font-size:12.5px;font-weight:600;padding:4px 14px;border-radius:999px;margin-bottom:14px;letter-spacing:1px}
.plat-txt h2{font-size:32px;margin:0 0 12px;color:#fff}
.plat-txt>p{color:rgba(255,255,255,.75);margin:0 0 18px;line-height:1.8}
.plat-list{list-style:none;padding:0;margin:0 0 26px}
.plat-list li{color:rgba(255,255,255,.82);font-size:14.5px;line-height:1.7;padding:7px 0 7px 26px;position:relative;
  border-bottom:1px dashed rgba(255,255,255,.12)}
.plat-list li:last-child{border-bottom:none}
.plat-list li::before{content:'✓';position:absolute;left:2px;top:7px;color:#f5c518;font-weight:700}
.plat-list b{color:#fff}
.btn-plat{display:inline-block;background:linear-gradient(135deg,#f5c518,#e8a90a);color:#1a1a1a;font-weight:700;
  font-size:15.5px;padding:13px 34px;border-radius:10px;text-decoration:none;box-shadow:0 6px 20px rgba(245,197,24,.35);
  transition:transform .2s,box-shadow .2s}
.btn-plat:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(245,197,24,.45)}
.plat-visual{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:28px 26px;backdrop-filter:blur(4px)}
.pv-line{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.pv-ai{width:70px;font-size:13px;color:rgba(255,255,255,.85);text-align:right;white-space:nowrap}
.pv-bar{flex:1;height:12px;background:rgba(255,255,255,.12);border-radius:999px;overflow:hidden}
.pv-bar i{display:block;height:100%;background:linear-gradient(90deg,#f5c518,#ffd75e);border-radius:999px}
.pv-num{width:44px;font-size:13.5px;font-weight:700;color:#f5c518}
.pv-cap{margin-top:6px;font-size:12px;color:rgba(255,255,255,.5);text-align:center}
@media(max-width:860px){
  .plat-in{grid-template-columns:1fr;gap:32px}
  .plat-txt h2{font-size:26px}
}

/* ---- v9: 90% 宽大气布局 + 下滑渐入动效 ---- */
.sec { padding: 84px 0; }
.sec-head h2 { font-size: 34px; }
.sec-head { margin-bottom: 44px; }
.hero { padding: 120px 0; }
.hero h1 { font-size: 46px; }

/* 下滑渐入：JS 给元素加 .rv，进入视口时加 .on 触发过渡 */
.rv { opacity: 0; transform: translateY(34px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,.61,.36,1); }
.rv.on { opacity: 1; transform: none; }
/* 首屏 hero 载入即浮现 */
.hero .rv { transition-duration: .9s; }
/* 错开节奏由 JS 内联 transition-delay 控制 */
@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ---- v10: 图片 logo + 微信二维码 ---- */
.logo { display: flex; align-items: center; gap: 10px; }
.logo-img { height: 38px; width: auto; display: block; }
.wechat-qr { display: flex; align-items: center; gap: 16px; margin-top: 22px;
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; }
.wechat-qr img { width: 118px; height: 118px; object-fit: contain; border-radius: 8px; }
.wechat-qr b { display: block; font-size: 16px; color: #0b1e3f; margin-bottom: 4px; }
.wechat-qr span { font-size: 13.5px; color: #6b7280; }