/* ============================================================
   直播分发网 · 全站视觉样式 V2
   设计基调：蓝色科技感 / 清晰层级 / 克制动效
   ============================================================ */
:root{
  --blue:#0a4dff;
  --blue-2:#22a0ff;
  --blue-3:#00c6ff;
  --deep:#0b1c3d;
  --deep2:#0e2450;
  --sky:#eaf1ff;
  --sky2:#f0f6ff;
  --line:#e6ecf7;
  --text:#1b2740;
  --muted:#5b6b8c;
  --bg:#f6f8fd;
  --card:#ffffff;
  --grad:linear-gradient(135deg,#0a4dff 0%,#22a0ff 60%,#00c6ff 100%);
  --grad-soft:linear-gradient(135deg,#eaf1ff 0%,#f6f9ff 100%);
  --radius:16px;
  --radius-sm:12px;
  --max:1320px;
  --shadow-sm:0 4px 14px rgba(20,40,90,.05);
  --shadow-md:0 12px 32px rgba(10,77,255,.10);
  --shadow-lg:0 24px 60px rgba(10,77,255,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  color:var(--text);background:#fff;line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
::selection{background:rgba(10,77,255,.16);color:var(--deep)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#c3d2f2;border-radius:8px;border:2px solid #fff}
::-webkit-scrollbar-thumb:hover{background:#9db6e8}
::-webkit-scrollbar-track{background:transparent}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ============ 顶部信息条 ============ */
.topbar{
  background:linear-gradient(90deg,#081230,#0e2450 50%,#0a4dff);
  color:#bcd0ff;font-size:12.5px;padding:7px 0;
  letter-spacing:.3px;
}
.topbar .container{display:flex;justify-content:space-between;gap:12px}
.topbar span:first-child{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar span:last-child{white-space:nowrap}
.topbar b{color:#fff}

/* ============ 头部导航 ============ */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(16px) saturate(1.4);
  -webkit-backdrop-filter:blur(16px) saturate(1.4);
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 24px rgba(20,40,90,.05);
}
.navwrap{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--deep);white-space:nowrap}
.logo-mark{
  width:38px;height:38px;border-radius:11px;background:var(--grad);
  display:grid;place-items:center;color:#fff;font-weight:900;font-size:18px;
  box-shadow:0 6px 16px rgba(10,77,255,.35),inset 0 0 12px rgba(255,255,255,.25);
  position:relative;overflow:hidden;
}
.logo-mark::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.45) 50%,transparent 70%);transform:translateX(-120%);animation:logoShine 4.5s infinite}
@keyframes logoShine{0%,60%{transform:translateX(-120%)}80%,100%{transform:translateX(120%)}}
.logo small{display:block;font-size:11px;color:var(--blue);letter-spacing:2px;font-weight:700}
nav.main{display:flex;justify-content:center;gap:10px;flex:1;overflow:auto;scrollbar-width:none}
nav.main::-webkit-scrollbar{display:none}
nav.main a{
  padding:9px 13px;border-radius:9px;font-size:14.5px;color:#2a3a5f;white-space:nowrap;
  position:relative;transition:color .2s var(--ease),background .2s var(--ease);
}
nav.main a::after{
  content:"";position:absolute;left:50%;bottom:3px;width:0;height:2px;
  background:var(--grad);border-radius:2px;transform:translateX(-50%);
  transition:width .25s var(--ease);
}
nav.main a:hover{color:var(--blue)}
nav.main a:hover::after{width:60%}
nav.main a.on{background:var(--sky);color:var(--blue);font-weight:700}
nav.main a.on::after{width:60%}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:12px;padding:12px 22px;font-weight:700;border:1px solid transparent;
  cursor:pointer;font-size:15px;transition:.22s var(--ease);position:relative;overflow:hidden;
}
.btn-pri{
  background:linear-gradient(135deg,#0a4dff,#22a0ff);color:#fff;
  box-shadow:0 8px 20px rgba(10,77,255,.32);
}
.btn-pri::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);
  transform:translateX(-130%);transition:transform .5s var(--ease);
}
.btn-pri:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(10,77,255,.42)}
.btn-pri:hover::after{transform:translateX(130%)}
.btn-ghost{background:#fff;border-color:#c9d6ff;color:var(--blue)}
.btn-ghost:hover{background:var(--sky);border-color:var(--blue);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--deep)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.18)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}
.hamb{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 12px;font-size:18px;cursor:pointer}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 420px at 80% -60px,#dbe7ff 0%,transparent 60%),
    radial-gradient(700px 380px at 10% 10%,#e3ecff 0%,transparent 55%),
    linear-gradient(180deg,#f2f6ff 0%,#fff 100%);
}
/* 背景网格 */
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(10,77,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(10,77,255,.028) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(860px 500px at 50% 0%,#000 0%,transparent 72%);
          mask-image:radial-gradient(860px 500px at 50% 0%,#000 0%,transparent 72%);
}
/* 浮动光斑 */
.hero::after{
  content:"";position:absolute;width:620px;height:620px;right:-180px;top:-180px;pointer-events:none;
  background:radial-gradient(circle,rgba(34,160,255,.13),transparent 65%);
  animation:blobFloat 9s ease-in-out infinite;
}
@keyframes blobFloat{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-36px,28px) scale(1.12)}}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:72px;align-items:center;padding:108px 24px 96px;position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.85);
  border:1px solid #d5e1ff;color:var(--blue);border-radius:999px;
  padding:6px 14px;font-size:13px;font-weight:700;box-shadow:0 6px 18px rgba(10,77,255,.08);
  backdrop-filter:blur(6px);
}
.eyebrow i{
  width:8px;height:8px;border-radius:50%;background:#22c55e;
  box-shadow:0 0 0 0 rgba(34,197,94,.5);
  animation:pulseRing 2s infinite;
}
@keyframes pulseRing{
  0%{box-shadow:0 0 0 0 rgba(34,197,94,.45)}
  70%{box-shadow:0 0 0 9px rgba(34,197,94,0)}
  100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}
}
h1.hero-h{
  font-size:56px;line-height:1.16;margin:26px 0 18px;color:var(--deep);
  letter-spacing:1px;font-weight:800;
}
h1.hero-h span{
  background:linear-gradient(90deg,#0a4dff,#22a0ff,#00c6ff,#0a4dff);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:gradShift 6s linear infinite;
}
@keyframes gradShift{0%{background-position:0% 50%}100%{background-position:220% 50%}}
.hero-sub{color:var(--muted);font-size:18px;max-width:640px;line-height:1.9}
.hero-cta{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}
.hero-meta{display:flex;gap:52px;margin-top:36px;color:var(--muted);font-size:14px;flex-wrap:wrap}
.hero-meta b{color:var(--deep);font-size:27px;display:block;line-height:1.15;font-weight:800}
.hero-meta>div{padding-top:10px;border-top:2px solid var(--line)}
.hero-meta>div:first-child{border-top-color:var(--blue)}
.signal-card{
  background:linear-gradient(180deg,#0e2450,#081530);
  border-radius:24px;padding:30px;color:#dbe7ff;
  box-shadow:0 30px 70px rgba(11,28,61,.4);
  border:1px solid rgba(255,255,255,.12);position:relative;overflow:hidden;
}
.signal-card::before{
  content:"";position:absolute;inset:-40px;
  background:radial-gradient(420px 230px at 50% 0%,rgba(34,160,255,.45),transparent 70%);
  pointer-events:none;
}
.signal-card::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:26px 26px;
}
.signal-card>*{position:relative;z-index:1}
.signal-card .live-badge{
  display:inline-flex;align-items:center;gap:6px;float:right;
  font-size:12px;font-weight:800;color:#fff;background:#22c55e;
  padding:3px 12px;border-radius:999px;letter-spacing:1px;
}
.signal-card .live-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:#fff;animation:blink 1.2s infinite}
.flow{display:grid;gap:12px;position:relative}
.node{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:13px;padding:13px 16px;display:flex;justify-content:space-between;
  align-items:center;font-size:14.5px;transition:.2s var(--ease);
  backdrop-filter:blur(4px);
}
.node:hover{background:rgba(255,255,255,.13);transform:translateX(4px)}
.node.live{
  background:linear-gradient(135deg,#ff4d5e,#ff8a3d);border:none;color:#fff;font-weight:800;
  box-shadow:0 8px 24px rgba(255,77,94,.35);
}
.node .tag{font-size:11px;background:rgba(255,255,255,.18);padding:2px 8px;border-radius:999px;font-weight:600}
.arrow{text-align:center;color:#7ea2ff;font-size:12px;letter-spacing:3px;animation:arrowDown 1.8s ease-in-out infinite}
@keyframes arrowDown{0%,100%{opacity:.55;transform:translateY(0)}50%{opacity:1;transform:translateY(3px)}}

/* ============ 通用区块 ============ */
.section{padding:72px 0}
.section.gray{background:var(--bg)}
.sec-head{max-width:760px;margin:0 auto 36px;text-align:center}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--blue);font-weight:800;letter-spacing:3px;font-size:13px;
  background:var(--sky);border:1px solid #d8e4ff;border-radius:999px;padding:5px 16px;
}
.kicker::before,.kicker::after{content:"";width:18px;height:2px;background:var(--grad);border-radius:2px;opacity:.6}
.sec-head h2{font-size:34px;margin:12px 0 6px;color:var(--deep);line-height:1.35;font-weight:800}
.sec-head p{color:var(--muted);margin:0}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);transition:.28s var(--ease);position:relative;
}
.card:hover{
  transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:#c9d6ff;
}
.card .ico{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:23px;
  background:var(--grad-soft);margin-bottom:14px;position:relative;overflow:hidden;
  transition:.28s var(--ease);
}
.card:hover .ico{background:var(--grad);transform:scale(1.06) rotate(-4deg);box-shadow:0 8px 20px rgba(10,77,255,.28)}
.card h3{margin:6px 0 8px;font-size:18px;color:var(--deep)}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.scene-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.scene{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 10px;
  text-align:center;font-weight:700;color:var(--deep);
  transition:.25s var(--ease);position:relative;overflow:hidden;
}
.scene::before{content:"";position:absolute;inset:0;background:var(--grad);opacity:0;transition:.25s var(--ease)}
.scene:hover{transform:translateY(-4px);border-color:transparent;color:#fff;box-shadow:var(--shadow-md)}
.scene:hover::before{opacity:1}
.scene>*{position:relative}
.scene span{display:block;font-size:26px;margin-bottom:6px;transition:.25s var(--ease)}
.scene:hover span{transform:scale(1.15)}
.scene small{display:block;color:var(--muted);font-weight:400;font-size:12px;margin-top:4px;transition:.25s var(--ease)}
.scene:hover small{color:rgba(255,255,255,.85)}
.media-cats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.media-cats div{
  background:#fff;border:1px dashed #b9c9f5;border-radius:14px;padding:18px;
  text-align:center;font-weight:700;color:var(--deep);transition:.22s var(--ease);
}
.media-cats small{display:block;color:var(--muted);font-weight:400;font-size:12.5px;margin-top:6px}
.note{
  background:#fff8e6;border:1px solid #ffe1a8;color:#7a5b00;
  border-radius:12px;padding:12px 16px;font-size:13.5px;margin-top:16px;
  border-left:4px solid #f5b93d;
}
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 14px;
  text-align:center;position:relative;transition:.25s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#c9d6ff}
.step b.num{
  font-size:26px;background:linear-gradient(135deg,#0a4dff,#22a0ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;display:block;
  font-weight:900;letter-spacing:1px;
}
.step h4{margin:8px 0 4px;font-size:15px;color:var(--deep)}
.step p{margin:0;font-size:12.5px;color:var(--muted)}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{overflow:hidden;padding:0}
.case .cover{
  height:170px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;
  padding:16px;position:relative;overflow:hidden;transition:.3s var(--ease);
}
.case:hover .cover{transform:scale(1.03) translateY(2px)}
.case .cover::after{
  content:"LIVE";position:absolute;top:12px;left:12px;background:#ff3b4e;
  font-size:11px;font-weight:800;padding:3px 9px;border-radius:999px;letter-spacing:1px;
  box-shadow:0 4px 12px rgba(255,59,78,.45);animation:blink 2s infinite;
}
.case .cover::before{
  content:"";position:absolute;width:340px;height:340px;right:-100px;top:-120px;
  background:radial-gradient(circle,rgba(255,255,255,.28),transparent 65%);
}
.case .cover::marker{content:""}
.case .body{padding:18px 20px 20px}
.case .body h3{margin:0 0 8px;font-size:17px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--muted)}
.meta-row span{background:var(--bg);border:1px solid var(--line);padding:3px 10px;border-radius:999px}
.faq{max-width:860px;margin:0 auto}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;
  overflow:hidden;transition:.22s var(--ease);
}
.faq details:hover{border-color:#c9d6ff}
.faq details[open]{box-shadow:var(--shadow-sm);border-color:#c9d6ff}
.faq summary{
  padding:16px 20px;cursor:pointer;font-weight:700;color:var(--deep);list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  transition:.2s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex-shrink:0;width:26px;height:26px;border-radius:8px;
  background:var(--sky);color:var(--blue);display:grid;place-items:center;
  font-size:17px;font-weight:800;transition:.25s var(--ease);
}
.faq details[open] summary{color:var(--blue)}
.faq details[open] summary::after{transform:rotate(45deg);background:var(--blue);color:#fff}
.faq .a{padding:0 20px 18px;color:var(--muted);font-size:14.5px}
.cta-band{
  background:linear-gradient(135deg,#081d52,#0a4dff 55%,#22a0ff);
  border-radius:22px;color:#fff;padding:52px 40px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(500px 240px at 50% 0%,rgba(255,255,255,.28),transparent 70%);
}
.cta-band::after{
  content:"";position:absolute;width:300px;height:300px;left:-120px;bottom:-140px;pointer-events:none;
  background:radial-gradient(circle,rgba(255,255,255,.14),transparent 65%);
  animation:blobFloat 8s ease-in-out infinite;
}
.cta-band h2{font-size:36px;margin:0 0 10px;line-height:1.4;position:relative;z-index:1}
.cta-band p{opacity:.9;position:relative;z-index:1}
.cta-band .row{display:flex;gap:12px;justify-content:center;margin-top:22px;position:relative;z-index:1;flex-wrap:wrap}

/* ============ 文章列表 ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.post{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;
  transition:.25s var(--ease);display:flex;flex-direction:column;
}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d6ff}
.post h3{font-size:16.5px;margin:0 0 8px;color:var(--deep);line-height:1.5}
.post h3 a{transition:.18s}
.post h3 a:hover{color:var(--blue)}
.post p{font-size:13.5px;color:var(--muted);margin:0 0 12px;flex:1}
.post .more{font-size:13.5px;color:var(--blue);font-weight:700}
.post .more:hover{text-decoration:underline}

/* ============ 内页 Hero ============ */
.page-hero{
  background:linear-gradient(180deg,#edf3ff 0%,#fff 100%);
  border-bottom:1px solid var(--line);padding:46px 0 34px;position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(10,77,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(10,77,255,.04) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:radial-gradient(600px 260px at 50% 0%,#000,transparent 78%);
          mask-image:radial-gradient(600px 260px at 50% 0%,#000,transparent 78%);
}
.page-hero>*{position:relative}
.page-hero h1{font-size:36px;color:var(--deep);margin:8px 0;font-weight:800}
.crumbs{font-size:13px;color:var(--muted)}
.crumbs a:hover{color:var(--blue)}
.prose{max-width:880px}
.prose h2{
  color:var(--deep);font-size:24px;margin-top:36px;
  border-left:4px solid var(--blue);padding-left:12px;line-height:1.5;
}
.prose h3{color:var(--deep);font-size:18px}
.prose p,.prose li{color:#33415e;font-size:15.5px}
.answer-box{
  background:linear-gradient(135deg,#f0f5ff,#f7faff);border:1px solid #c9d6ff;
  border-radius:14px;padding:18px 20px;margin:20px 0;border-left:4px solid var(--blue);
}
.answer-box b{color:var(--blue)}
.toc{
  background:var(--bg);border:1px solid var(--line);border-radius:14px;
  padding:16px 20px;font-size:14px;
}
.toc a{display:inline-block;padding:2px 0;color:#33415e}
.toc a:hover{color:var(--blue)}
.layout{display:grid;grid-template-columns:1fr 320px;gap:28px;padding:36px 0 60px;align-items:start}
.side{position:sticky;top:92px;display:grid;gap:16px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow-sm)}
.side-card h4{margin:0 0 12px;color:var(--deep);position:relative;padding-bottom:10px}
.side-card h4::after{content:"";position:absolute;left:0;bottom:0;width:32px;height:3px;border-radius:3px;background:var(--grad)}

/* ============ 表单 ============ */
.form label{display:block;font-size:13.5px;font-weight:700;margin:12px 0 6px;color:var(--deep)}
.form input,.form select,.form textarea{
  width:100%;border:1px solid #ccd6ef;border-radius:10px;padding:11px 12px;
  font-size:14px;font-family:inherit;background:#fff;transition:.18s var(--ease);
}
.form input:hover,.form select:hover,.form textarea:hover{border-color:#9db6e8}
.form input:focus,.form select:focus,.form textarea:focus{
  outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(10,77,255,.14);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* ============ 页脚 ============ */
footer{background:linear-gradient(180deg,#0b1c3d,#081530);color:#aebfe8;margin-top:0;position:relative}
footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:28px;padding:52px 24px 30px}
footer h4{color:#fff;font-size:15px;margin:0 0 14px;position:relative;padding-bottom:8px}
footer h4::after{content:"";position:absolute;left:0;bottom:0;width:24px;height:2px;background:var(--grad);border-radius:2px}
footer a{display:block;font-size:13.5px;padding:4px 0;color:#aebfe8;transition:.18s}
footer a:hover{color:#fff;transform:translateX(3px)}
.foot-brand{color:#fff;font-size:20px;font-weight:800;display:flex;align-items:center;gap:8px}
.foot-brand::before{content:"播";width:30px;height:30px;border-radius:9px;background:var(--grad);color:#fff;font-size:15px;font-weight:900;display:grid;place-items:center}
.copy{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:12.5px;color:#7f93c4}
.copy .container{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ============ 弹窗 / 悬浮按钮 ============ */
.modal-bg{
  position:fixed;inset:0;background:rgba(8,18,40,.55);display:none;place-items:center;
  z-index:90;padding:16px;backdrop-filter:blur(6px);
}
.modal-bg.show{display:grid}
.modal{
  background:#fff;border-radius:18px;max-width:640px;width:100%;max-height:92vh;
  overflow:auto;padding:28px;box-shadow:0 40px 90px rgba(0,0,0,.35);
  animation:modalIn .3s var(--ease);
}
@keyframes modalIn{from{opacity:0;transform:translateY(18px) scale(.97)}to{opacity:1;transform:none}}
.float-cta{
  position:fixed;bottom:0;left:0;right:0;z-index:60;display:none;
  background:rgba(255,255,255,.97);border-top:1px solid var(--line);
  padding:10px 12px;gap:10px;backdrop-filter:blur(10px);
}
.float-cta .btn{flex:1}

/* ============ 后台 ============ */
.admin{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.admin aside{
  background:linear-gradient(180deg,#0b1c3d,#0e2450);color:#c9d8ff;padding:22px;
  position:sticky;top:0;height:100vh;overflow:auto;
}
.admin aside button{
  display:block;width:100%;text-align:left;background:transparent;border:0;color:#c9d8ff;
  padding:11px 12px;border-radius:10px;font-size:14px;cursor:pointer;margin-bottom:4px;
  transition:.18s;font-family:inherit;
}
.admin aside button.on,.admin aside button:hover{background:rgba(255,255,255,.14);color:#fff}
.admin main{padding:26px;background:var(--bg)}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:16px;box-shadow:var(--shadow-sm)}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{border-bottom:1px solid var(--line);padding:9px 8px;text-align:left;vertical-align:top}
th{color:var(--deep);background:var(--sky2)}

/* ============================================================
   V1.0 扩展样式（保留类名 · 视觉升级）
   ============================================================ */
.section{padding:58px 0}
.sec-head{margin:0 auto 30px}
.sec-head h2{font-size:32px}
.page-hero{padding:32px 0 24px}
.page-hero h1{font-size:31px;margin:6px 0}
.page-hero .btn{padding:10px 20px}
/* 首页服务区卡片顶部 accent */
.band-services .card{border-top:4px solid var(--blue)}
.band-services .card:nth-child(3n+2){border-top-color:#22a0ff}
.band-services .card:nth-child(3n){border-top-color:#00c6ff}
.band-services .card:hover{border-top-width:4px}
/* 首页 why 区浅蓝底卡片 */
.band-why .card{background:linear-gradient(180deg,#f5f8ff,#fff)}
/* 流程时间线 */
.steps.timeline{position:relative}
.steps.timeline .step{padding-top:28px}
.steps.timeline .step::before{
  content:"";position:absolute;top:14px;left:14px;right:14px;height:2px;
  background:linear-gradient(90deg,var(--blue),#22a0ff);opacity:.35;border-radius:2px;
}
.steps.timeline .step::after{
  content:"";position:absolute;top:9px;left:50%;width:12px;height:12px;margin-left:-6px;
  border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px #dbe7ff;
}
.steps.timeline .step:hover::after{box-shadow:0 0 0 6px rgba(10,77,255,.16)}
/* 媒体矩阵传播节点 */
.media-cats.nodes div{position:relative;text-align:left;padding:16px 16px 16px 44px}
.media-cats.nodes div::before{
  content:"";position:absolute;left:18px;top:22px;width:10px;height:10px;border-radius:50%;
  background:var(--grad);box-shadow:0 0 0 5px rgba(10,77,255,.12);
}
.media-cats.nodes div:hover{border-color:var(--blue);box-shadow:var(--shadow-md);transform:translateY(-3px)}
/* 方案卡片 */
.sol-card{border-left:5px solid var(--blue);display:flex;flex-direction:column;transition:.25s var(--ease)}
.sol-card:hover{border-left-color:var(--blue-2);box-shadow:var(--shadow-md)}
.sol-card.g2{border-left-color:#22a0ff}.sol-card.g3{border-left-color:#00c6ff}
.sol-card .goal{
  font-size:13.5px;color:var(--blue);font-weight:700;background:var(--sky);
  border-radius:8px;padding:6px 10px;margin:8px 0 10px;align-self:flex-start;
}
.sol-card .tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 12px}
.sol-card .tags span{
  font-size:12px;background:var(--bg);border:1px solid var(--line);
  color:#3a4c72;padding:2px 10px;border-radius:999px;
}
/* 资源详情卡 */
.res-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.res-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;
  border-top:4px solid var(--blue);transition:.25s var(--ease);
}
.res-card:nth-child(2n){border-top-color:#22a0ff}
.res-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.res-card h3{margin:0 0 6px;color:var(--deep);font-size:17px}
.res-card dl{margin:10px 0 0;font-size:14px}
.res-card dt{font-weight:800;color:var(--deep);margin-top:8px}
.res-card dd{margin:2px 0 0;color:var(--muted)}
/* 组合方案 */
.combo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.combo{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;
  display:flex;flex-direction:column;transition:.25s var(--ease);
}
.combo:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.combo.hot{border:2px solid var(--blue);box-shadow:0 14px 34px rgba(10,77,255,.14);position:relative}
.combo.hot::before{
  content:"最受欢迎";position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--grad);color:#fff;font-size:12px;font-weight:800;
  padding:3px 14px;border-radius:999px;white-space:nowrap;
}
.combo h3{margin:0;color:var(--deep)}
.combo .scale{font-size:26px;font-weight:800;color:var(--blue);margin:8px 0}
.combo ul{margin:0 0 16px;padding-left:18px;color:var(--muted);font-size:14px;flex:1}
.combo li{margin:4px 0}
/* 选择指南 */
.pick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.pick{
  background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:18px;
  transition:.22s var(--ease);
}
.pick:hover{transform:translateY(-3px);border-color:#c9d6ff;background:#fff;box-shadow:var(--shadow-sm)}
.pick b{color:var(--deep)}
.pick p{margin:6px 0 0;font-size:13.5px;color:var(--muted)}
/* V直播背书 */
.vbox{
  background:linear-gradient(135deg,#0e2450,#1b3fa0 60%,#22a0ff);
  border-radius:18px;color:#e7edff;padding:38px 34px;text-align:center;position:relative;overflow:hidden;
}
.vbox::before{content:"";position:absolute;inset:-30px;background:radial-gradient(300px 180px at 50% 0%,rgba(255,255,255,.2),transparent 70%);pointer-events:none}
.vbox h3{color:#fff;font-size:24px;margin:0 0 10px}
.vbox .plus{font-size:22px;font-weight:800;color:#9db9ff;margin:8px 0}
.vbox .cap{
  display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  border-radius:10px;padding:8px 18px;margin:4px;font-weight:700;transition:.2s;
}
.vbox .cap:hover{background:rgba(255,255,255,.22)}
/* 对象/场景 chips */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips span{
  background:#fff;border:1px solid #c9d6ff;color:var(--deep);font-weight:700;
  font-size:14px;padding:9px 20px;border-radius:999px;transition:.2s var(--ease);
}
.chips span:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.chips.soft span{background:var(--bg);border-color:var(--line)}
.chips.soft span:hover{background:var(--sky)}
/* 知识库 */
.kb-bar{display:flex;gap:10px;max-width:640px;margin:18px auto 0}
.kb-bar input{
  flex:1;border:1px solid #c9d6ff;border-radius:12px;padding:12px 16px;
  font-size:14.5px;font-family:inherit;transition:.18s;
}
.kb-bar input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(10,77,255,.12)}
.kb-cats{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:16px}
.kb-cats button{
  border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 18px;
  font-size:14px;cursor:pointer;color:#2a3a5f;font-family:inherit;transition:.18s;
}
.kb-cats button:hover{border-color:var(--blue);color:var(--blue)}
.kb-cats button.on{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:700;box-shadow:0 6px 16px rgba(10,77,255,.28)}
.post .kb-tag{
  display:inline-block;font-size:12px;font-weight:800;color:var(--blue);
  background:var(--sky);border-radius:6px;padding:2px 10px;margin-bottom:8px;
}
.post .pdate{font-size:12px;color:#93a1c0;margin-top:10px}
.kb-bottom{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}
.kb-bottom .side-card h4{margin-bottom:8px}
.kb-bottom a{font-size:14px;color:#2a3a5f}
.kb-bottom a:hover{color:var(--blue)}

/* ============ 响应式 ============ */
@media(max-width:1360px){
  nav.main{gap:4px}
  nav.main a{padding:9px 9px;font-size:14px}
}
@media(max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:52px;padding:56px 24px}
  h1.hero-h{font-size:40px}
  .hero-meta{gap:40px}
  .grid4,.media-cats{grid-template-columns:repeat(2,1fr)}
  .grid3,.post-grid,.case-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .scene-grid{grid-template-columns:repeat(3,1fr)}
  .layout{grid-template-columns:1fr}
  .side{position:static}
  nav.main{
    display:none;position:absolute;top:68px;left:0;right:0;background:rgba(255,255,255,.98);
    flex-direction:column;padding:10px 16px 16px;border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px rgba(0,0,0,.1);backdrop-filter:blur(12px);
  }
  nav.main.open{display:flex}
  .navwrap{justify-content:space-between}
  .hamb{display:block}
  .foot-grid{grid-template-columns:1fr 1fr}
  .admin{grid-template-columns:1fr}
  .admin aside{display:flex;overflow:auto;gap:6px;position:static;height:auto}
  .res-grid,.combo-grid,.pick-grid,.kb-bottom{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  body{font-size:15px}
  .section{padding:50px 0}
  .sec-head h2{font-size:25px}
  h1.hero-h{font-size:33px;margin:20px 0 14px}
  .hero-meta{gap:28px;margin-top:28px}
  .hero-meta b{font-size:23px}
  .grid4,.grid3,.grid2,.post-grid,.case-grid,.media-cats{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .form-row{grid-template-columns:1fr}
  .cta-band{padding:36px 20px}
  .cta-band h2{font-size:25px}
  .float-cta{display:flex}
  body{padding-bottom:64px}
  .navwrap .btn{display:none}
  .section{padding:44px 0}
  .sec-head h2{font-size:24px}
  .page-hero{padding:26px 0 20px}
  .page-hero h1{font-size:25px}
  .res-grid,.combo-grid,.pick-grid,.kb-bottom{grid-template-columns:1fr}
  .steps.timeline .step::before,.steps.timeline .step::after{display:none}
  .kb-bar{flex-direction:column}
}

/* ============ 进场动效（尊重系统减弱动效） ============ */
@media (prefers-reduced-motion:no-preference){
  .section .sec-head,.section .grid4,.section .grid3,.section .scene-grid,
  .section .media-cats,.section .steps,.section .post-grid,
  .section .faq,.cta-band{
    animation:fadeUp .6s var(--ease) both;
  }
  .section .case-grid{animation:none;opacity:1}
  .section:nth-of-type(2) .sec-head{animation-delay:.05s}
  .section:nth-of-type(3) .sec-head{animation-delay:.05s}
  .cta-band{animation-delay:.1s}
}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s !important;transition-duration:.001s !important}
}