/* ===== 蓝点呼吸 全站公共样式 ===== */
:root{
  --blue-900:#04122b;
  --blue-800:#061a3d;
  --blue-700:#0a2452;
  --blue-600:#0f336b;
  --blue-500:#1453b0;
  --blue-400:#2a7de1;
  --blue-300:#5ba3f0;
  --blue-200:#9ccbfa;
  --blue-100:#e0eefe;
  --blue-50:#f2f8ff;
  --dot:#34a8ff;
  --dot-soft:#7bc0ff;
  --ink:#0b1b3a;
  --ink-2:#34405a;
  --ink-3:#6b768f;
  --line:#e2e9f4;
  --bg:#f7faff;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 18px 50px -18px rgba(16,52,110,.35);
  --maxw:1160px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,video{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(247,250,255,.82);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;height:64px;gap:24px}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:19px;color:var(--ink);letter-spacing:.5px;white-space:nowrap}
.logo .dot{width:13px;height:13px;border-radius:50%;background:var(--dot);animation:breathe 3s ease-in-out infinite;flex:none}
.nav-links{display:flex;gap:24px;margin-left:10px;font-size:14.5px;color:var(--ink-2);flex:1}
.nav-links a{transition:color .2s;padding:6px 2px;border-bottom:2px solid transparent}
.nav-links a:hover{color:var(--blue-500)}
.nav-links a.active{color:var(--blue-500);border-bottom-color:var(--dot)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:10px;font-weight:600;font-size:14.5px;padding:10px 22px;cursor:pointer;border:none;transition:all .25s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--blue-500),var(--blue-400));color:#fff;box-shadow:0 10px 26px -10px rgba(36,125,225,.65)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px -10px rgba(36,125,225,.8)}
.btn-ghost{background:var(--white);color:var(--blue-600);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue-400);color:var(--blue-500)}
.btn-sm{padding:8px 18px;font-size:13.5px;border-radius:9px}

/* ---------- Page Hero (内页) ---------- */
.page-hero{position:relative;overflow:hidden;background:
   radial-gradient(900px 420px at 82% -20%,rgba(91,163,240,.3),transparent 60%),
   radial-gradient(700px 380px at 10% 120%,rgba(52,168,255,.14),transparent 55%),
   linear-gradient(180deg,var(--blue-900),var(--blue-700) 60%,var(--blue-600));
   color:#fff}
.page-hero::before{content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);background-size:34px 34px;
  mask-image:linear-gradient(180deg,#000,transparent 80%);opacity:.5}
.page-hero .wrap{position:relative;z-index:2;padding:72px 24px 80px}
.page-hero .kicker{font-size:13px;letter-spacing:2px;color:var(--blue-200);font-weight:700;margin-bottom:14px}
.page-hero h1{font-size:40px;font-weight:800;letter-spacing:1px;margin-bottom:16px}
.page-hero p{font-size:17px;color:rgba(255,255,255,.78);max-width:640px}

/* ---------- Section general ---------- */
section{padding:80px 0}
.sec-head{text-align:center;max-width:660px;margin:0 auto 54px}
.sec-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--blue-500);text-transform:uppercase;margin-bottom:14px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--ink);margin-bottom:14px;letter-spacing:.5px}
.sec-head p{font-size:16px;color:var(--ink-3)}
.bg-soft{background:linear-gradient(180deg,var(--blue-50),#fff)}

/* ---------- Steps (产品页) ---------- */
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:8px}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;position:relative}
.step .no{font-size:36px;font-weight:800;color:var(--blue-100);font-family:"Georgia",serif;line-height:1;margin-bottom:12px}
.step h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:8px}
.step p{font-size:14.5px;color:var(--ink-2)}
.note{background:var(--blue-50);border:1px dashed var(--blue-200);border-radius:12px;padding:14px 18px;font-size:13.5px;color:var(--ink-2);margin-top:26px;display:flex;gap:10px;align-items:flex-start}
.note::before{content:"※";color:var(--blue-400);font-weight:700;flex:none}

/* ---------- Service cards ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.svc{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.svc:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.svc .head{padding:30px 28px 6px}
.svc .badge{display:inline-block;font-size:12px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--blue-500),var(--blue-400));padding:4px 12px;border-radius:6px;margin-bottom:14px}
.svc h3{font-size:20px;font-weight:700;margin-bottom:10px}
.svc .lead{font-size:14.5px;color:var(--ink-2);margin-bottom:16px}
.svc .stats{display:flex;gap:22px;margin-bottom:18px;flex-wrap:wrap}
.svc .stats .st{display:flex;flex-direction:column}
.svc .stats .num{font-size:22px;font-weight:800;color:var(--blue-500)}
.svc .stats .lbl{font-size:12px;color:var(--ink-3)}
.svc ul{list-style:none;display:flex;flex-direction:column;gap:9px;padding:0 28px 22px}
.svc li{font-size:14px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start}
.svc li::before{content:"";flex:none;width:7px;height:7px;border-radius:50%;background:var(--blue-400);margin-top:8px;animation:breathe 3s infinite}
.svc .foot{margin-top:auto;padding:0 28px 26px}

/* ---------- Process flow ---------- */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:8px}
.flow-item{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:26px 24px;text-align:center}
.flow-item .no{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--blue-500),var(--blue-400));color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:17px}
.flow-item h3{font-size:16px;font-weight:700;margin-bottom:8px}
.flow-item p{font-size:13.5px;color:var(--ink-2)}

/* ---------- 定制服务四要素 ---------- */
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pillar{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:26px 22px;transition:all .3s}
.pillar:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.pillar .ic{width:46px;height:46px;border-radius:12px;background:var(--blue-50);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px}
.pillar h3{font-size:15.5px;font-weight:700;margin-bottom:8px}
.pillar p{font-size:13.5px;color:var(--ink-2)}

/* ---------- Cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.case{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.case .cover{height:180px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.case .cover .ph{font-size:64px;opacity:.32;font-family:"Georgia",serif}
.case.c1 .cover{background:linear-gradient(135deg,#1a3a6e,#2a7de1)}
.case.c2 .cover{background:linear-gradient(135deg,#0e4a5e,#34a8ff)}
.case.c3 .cover{background:linear-gradient(135deg,#3a2a6e,#5ba3f0)}
.case .cover .role-tag{position:absolute;top:14px;left:14px;font-size:11.5px;font-weight:700;color:#fff;background:rgba(4,18,43,.45);backdrop-filter:blur(4px);padding:4px 10px;border-radius:6px}
.case .cover .flower{position:absolute;top:14px;right:14px;font-size:12px;font-weight:700;color:#fff;background:rgba(4,18,43,.45);backdrop-filter:blur(4px);padding:4px 10px;border-radius:6px}
.case .body{padding:26px 26px 28px;flex:1;display:flex;flex-direction:column}
.case .meta{font-size:12px;color:var(--blue-500);font-weight:700;letter-spacing:1px;margin-bottom:12px}
.case h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:10px;line-height:1.5}
.case p{font-size:14px;color:var(--ink-2);margin-bottom:16px;flex:1}
.case .read{font-size:13.5px;font-weight:600;color:var(--blue-500);display:inline-flex;align-items:center;gap:5px}
.case .read:hover{color:var(--blue-400)}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:220px 1fr;gap:46px;align-items:flex-start}
.faq-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:8px}
.faq-side button{text-align:left;background:var(--white);border:1px solid var(--line);border-radius:10px;padding:11px 16px;font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;transition:all .2s;font-family:inherit}
.faq-side button:hover{border-color:var(--blue-300);color:var(--blue-500)}
.faq-side button.active{background:linear-gradient(135deg,var(--blue-500),var(--blue-400));color:#fff;border-color:transparent}
.faq-group{margin-bottom:44px}
.faq-group h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:18px;display:flex;align-items:center;gap:10px}
.faq-group h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--dot);animation:breathe 3s infinite}
details.faq{background:var(--white);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color .2s}
details.faq[open]{border-color:var(--blue-300);box-shadow:0 10px 28px -16px rgba(36,125,225,.45)}
details.faq summary{cursor:pointer;padding:17px 22px;font-size:15px;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-size:20px;color:var(--blue-400);font-weight:700;flex:none;transition:transform .2s}
details.faq[open] summary::after{content:"−"}
details.faq .ans{padding:0 22px 18px;font-size:14.2px;color:var(--ink-2)}
details.faq .ans .src{display:block;margin-top:10px;font-size:12.5px;color:var(--ink-3)}

/* ---------- About ---------- */
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.story-text h2{font-size:28px;font-weight:800;margin-bottom:18px}
.story-text p{font-size:15.5px;color:var(--ink-2);margin-bottom:16px}
.story-visual{background:linear-gradient(135deg,var(--blue-700),var(--blue-500));border-radius:20px;height:300px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.story-visual::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:26px 26px}
.story-visual .orb{width:150px;height:150px;border-radius:50%;background:radial-gradient(circle at 32% 30%,#bfe0ff,var(--dot-soft) 38%,var(--dot) 62%,#0a4d9c 100%);animation:breathe 3.6s ease-in-out infinite;box-shadow:0 0 50px rgba(52,168,255,.55);position:relative;z-index:2}
.timeline{display:flex;flex-direction:column;gap:0;margin-top:8px}
.tl-item{position:relative;padding:0 0 34px 34px;border-left:2px solid var(--line)}
.tl-item:last-child{border-left-color:transparent;padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-8px;top:2px;width:14px;height:14px;border-radius:50%;background:var(--dot);box-shadow:0 0 0 4px var(--blue-50)}
.tl-item .year{font-size:13px;font-weight:700;color:var(--blue-500);letter-spacing:1px;margin-bottom:4px}
.tl-item h3{font-size:16px;font-weight:700;margin-bottom:6px}
.tl-item p{font-size:14px;color:var(--ink-2)}
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.member{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .3s;text-align:center}
.member:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.member .avatar{height:150px;display:flex;align-items:center;justify-content:center;font-size:52px;color:rgba(255,255,255,.45)}
.member.m1 .avatar{background:linear-gradient(135deg,#1a3a6e,#2a7de1)}
.member.m2 .avatar{background:linear-gradient(135deg,#0e4a5e,#34a8ff)}
.member.m3 .avatar{background:linear-gradient(135deg,#3a2a6e,#5ba3f0)}
.member .body{padding:22px 20px 26px}
.member h3{font-size:17px;font-weight:700;margin-bottom:4px}
.member .title{font-size:12.5px;font-weight:700;color:var(--dot);margin-bottom:12px}
.member p{font-size:13.5px;color:var(--ink-2)}
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.value{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:28px 24px}
.value .ic{font-size:28px;margin-bottom:14px}
.value h3{font-size:16px;font-weight:700;margin-bottom:8px}
.value p{font-size:14px;color:var(--ink-2)}

/* ---------- CTA band ---------- */
.cta-band{background:
  radial-gradient(700px 300px at 20% 20%,rgba(52,168,255,.35),transparent 60%),
  linear-gradient(135deg,var(--blue-700),var(--blue-500));border-radius:24px;padding:56px 50px;color:#fff;text-align:center;margin:0 24px;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);background-size:26px 26px;opacity:.6}
.cta-band h2{position:relative;font-size:32px;font-weight:800;margin-bottom:14px}
.cta-band p{position:relative;color:rgba(255,255,255,.82);max-width:560px;margin:0 auto 30px;font-size:16px}
.cta-band .btn-primary{background:#fff;color:var(--blue-600);box-shadow:0 14px 30px -10px rgba(0,20,60,.4)}
.cta-band .btn-primary:hover{transform:translateY(-2px)}

/* ---------- Footer ---------- */
footer{background:var(--blue-900);color:rgba(255,255,255,.7);padding:56px 0 34px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.foot-brand .logo{color:#fff;margin-bottom:14px}
.foot-brand p{font-size:13.5px;line-height:1.7;max-width:280px}
footer h4{color:#fff;font-size:14px;margin-bottom:16px;font-weight:600}
footer ul{list-style:none;display:flex;flex-direction:column;gap:11px}
footer li a{font-size:13.5px;transition:color .2s}
footer li a:hover{color:var(--blue-200)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;display:flex;justify-content:space-between;font-size:12.5px;flex-wrap:wrap;gap:10px}

/* ---------- Animations ---------- */
@keyframes breathe{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .nav .wrap{height:58px}
  .nav-links{display:none}
  .page-hero .wrap{padding:54px 24px 62px}
  .page-hero h1{font-size:30px}
  .steps,.svc-grid,.flow,.pillars,.case-grid,.team-grid,.value-grid{grid-template-columns:1fr}
  .faq-layout{grid-template-columns:1fr}
  .faq-side{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px}
  .faq-side button{white-space:nowrap;flex:none}
  .story-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  section{padding:58px 0}
  .sec-head h2{font-size:26px}
  .cta-band{padding:42px 26px;margin:0 16px}
  .cta-band h2{font-size:24px}
}
@media(max-width:560px){
  .foot-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:26px}
  .hero-stats{gap:22px}
}