:root{
  --ink:#16303F;
  --ink-2:#203E50;
  --muted:#5C7686;
  --sky:#3AAEDC;
  --sky-d:#1D8CBB;
  --sky-l:#EAF7FD;
  --sky-l2:#F4FBFE;
  --pink:#F07FA6;
  --pink-l:#FDEEF4;
  --line:#DAEBF4;
  --white:#FFFFFF;
  --shadow:0 16px 40px rgba(29,140,187,.10);
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC",STSong,SimSun,Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--serif);
  color:var(--ink);background:#fff;line-height:1.9;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.35;font-weight:700}
.wrap{width:100%;max-width:1100px;margin:0 auto;padding:0 26px}

/* ============ 顶栏：晴空白 ============ */
.top{
  position:sticky;top:0;z-index:90;background:rgba(255,255,255,.9);
  border-bottom:1px solid rgba(218,235,244,.9);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.top.on{box-shadow:0 10px 28px rgba(29,140,187,.08)}
.top-in{display:flex;align-items:center;height:72px;gap:18px}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand img{width:36px;height:36px;border-radius:11px;box-shadow:0 4px 12px rgba(240,127,166,.24)}
.brand-t b{display:block;font-family:var(--serif);font-size:19px;letter-spacing:1.6px;line-height:1.2}
.brand-t small{display:block;font-family:var(--sans);font-size:10px;letter-spacing:1.4px;color:var(--muted);margin-top:3px}
.nav{display:flex;gap:24px;margin-left:auto;font-family:var(--sans);font-size:13px;font-weight:600;color:#46626F}
.nav a{position:relative;padding:5px 0}
.nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--sky),var(--pink));transition:right .25s ease;
}
.nav a:hover{color:var(--sky-d)}
.nav a:hover::after{right:0}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;color:var(--ink);padding:4px}
.cta{
  flex:none;background:linear-gradient(135deg,#5CC8E8,#2E9FCB);color:#fff;
  font-family:var(--sans);font-size:12.5px;font-weight:800;letter-spacing:.6px;
  padding:10px 21px;border-radius:999px;box-shadow:0 7px 16px rgba(58,174,220,.32);
}
.cta:hover{background:linear-gradient(135deg,#4FBEE1,#1D8CBB);transform:translateY(1px)}

/* ============ 英雄区：天空渐变 ============ */
.hero{
  position:relative;overflow:hidden;padding:72px 0 66px;
  background:
    radial-gradient(620px 420px at 88% 2%,rgba(92,200,232,.30),transparent 70%),
    radial-gradient(520px 380px at 4% 86%,rgba(240,127,166,.16),transparent 72%),
    linear-gradient(178deg,#E8F6FE 0%,#F4FBFE 52%,#FFFFFF 100%);
}
.hero::before,
.hero::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
}
.hero::before{
  width:520px;height:520px;right:-150px;top:-190px;
  background:radial-gradient(circle,rgba(255,255,255,.9),rgba(255,255,255,0) 68%);
}
.hero::after{
  width:380px;height:380px;left:-140px;bottom:-200px;
  background:radial-gradient(circle,rgba(255,255,255,.75),rgba(255,255,255,0) 70%);
}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:46px;align-items:center;position:relative;z-index:1}
.kick{
  display:inline-flex;align-items:center;gap:9px;font-family:var(--sans);
  font-size:11px;letter-spacing:3px;color:var(--sky-d);background:#fff;
  border:1px solid #CDE9F4;border-radius:999px;padding:6px 15px;margin-bottom:18px;
  box-shadow:0 6px 14px rgba(58,174,220,.1);
}
.kick::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--pink)}
.hero h1{
  font-family:var(--serif);font-size:72px;letter-spacing:2px;line-height:1.05;
  margin-bottom:14px;font-weight:700;
}
.hero h1 span{
  background:linear-gradient(105deg,#2E9FCB 8%,#5CC8E8 48%,#F07FA6 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{font-size:19px;font-weight:700;color:var(--ink-2);margin-bottom:13px}
.hero .desc{font-size:15px;color:#4F6A79;max-width:560px;margin-bottom:28px;line-height:2.05}
.acts{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;color:#fff;
  background:linear-gradient(135deg,#5CC8E8,#2E9FCB);
  padding:14px 29px;border-radius:999px;font-family:var(--sans);
  font-weight:800;font-size:15px;
  box-shadow:0 12px 26px rgba(46,159,203,.32);
}
.btn svg{width:17px;height:17px}
.btn:hover{background:linear-gradient(135deg,#4FBEE1,#1D8CBB);transform:translateY(1px)}
.ghost{
  display:inline-flex;align-items:center;padding:12px 22px;border-radius:999px;
  background:#fff;border:1px solid #C4E5F3;color:var(--sky-d);
  font-family:var(--sans);font-size:13.5px;font-weight:700;
}
.ghost:hover{border-color:var(--sky);box-shadow:0 8px 18px rgba(58,174,220,.14)}
.facts{
  display:flex;flex-wrap:wrap;gap:0;margin-top:32px;padding-top:18px;
  border-top:1px solid #D8EDF7;
}
.facts div{padding:0 20px;border-left:1px solid #D8EDF7}
.facts div:first-child{padding-left:0;border-left:0}
.facts b{display:block;font-family:var(--sans);font-size:12.5px;color:var(--ink-2);letter-spacing:.4px}
.facts span{display:block;font-family:var(--sans);font-size:11px;color:#7C93A1;margin-top:2px}

/* 悬浮屏卡 */
.album{position:relative;height:500px;z-index:1}
.album::before{
  content:"";position:absolute;left:6%;right:4%;top:2%;bottom:2%;
  background:linear-gradient(160deg,#BFE8F8,#F4DCE6);
  border-radius:48% 48% 38% 38% / 42% 42% 30% 30%;
  opacity:.55;
}
.sky-label{
  position:absolute;right:0;top:2%;font-family:var(--sans);font-size:10px;
  letter-spacing:3.4px;color:rgba(29,140,187,.55);
  writing-mode:vertical-rl;border-left:1px solid rgba(29,140,187,.22);padding-left:10px;
}
.pg{
  position:absolute;background:#fff;padding:7px;margin:0;border-radius:18px;
  box-shadow:0 24px 50px rgba(22,48,63,.18),0 0 0 1px rgba(190,230,245,.9);
}
.pg img{width:100%;height:100%;object-fit:cover;border-radius:12px}
.p1{left:0;top:9%;width:51%;height:64%;transform:rotate(-3.4deg);z-index:2}
.p2{left:27%;top:0;width:48%;height:62%;transform:rotate(2.4deg);z-index:3}
.p3{right:2%;bottom:3%;width:45%;height:58%;transform:rotate(-1.8deg);z-index:4}
.seal{
  position:absolute;left:-6px;bottom:10%;width:60px;height:60px;border-radius:50%;
  background:linear-gradient(145deg,#F79CBB,#EE6F9B);color:#fff;
  font-family:var(--serif);font-size:27px;display:grid;place-items:center;
  z-index:6;box-shadow:0 12px 26px rgba(240,127,166,.4),inset 0 0 0 3px rgba(255,255,255,.32);
}

/* ============ 通用区块 ============ */
.sec{padding:76px 0;background:#fff}
.band{background:var(--sky-l2);border-top:1px solid #E6F3FA;border-bottom:1px solid #E6F3FA}
.hd2{display:grid;grid-template-columns:92px 1fr;gap:20px;align-items:start;margin-bottom:36px}
.hd2 .no{
  font-family:var(--sans);font-size:10.5px;letter-spacing:1px;color:var(--sky-d);
  background:var(--sky-l);border:1px solid #CFEAF5;border-radius:999px;
  padding:5px 0;text-align:center;white-space:nowrap;
}
.hd2 h2{font-family:var(--serif);font-size:32px;letter-spacing:2.4px;margin-bottom:8px}
.hd2 p{font-size:14.5px;color:var(--muted);max-width:800px}

/* 特色：柔软卡片三列 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  position:relative;background:#fff;border:1px solid #E2F0F8;border-radius:20px;
  padding:24px 22px 26px;box-shadow:0 8px 24px rgba(29,140,187,.05);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card .n{
  display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;
  background:linear-gradient(145deg,#EAF7FD,#D6EFF9);color:var(--sky-d);
  font-family:var(--sans);font-size:11px;font-weight:800;letter-spacing:.5px;
}
.card h4{font-family:var(--serif);font-size:18px;letter-spacing:1px;margin:13px 0 8px}
.card p{font-size:13.6px;color:#4F6A79;line-height:1.95}
.card:hover{transform:translateY(-4px);border-color:#BDE3F2;box-shadow:var(--shadow)}

/* 界面：一大 + 三小 */
.spread{display:grid;grid-template-columns:1.08fr .92fr;gap:22px;align-items:start}
.spread figure{margin:0;background:#fff;border:1px solid #E2F0F8;border-radius:20px;box-shadow:0 8px 24px rgba(29,140,187,.05)}
.big{padding:11px}
.big img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:13px}
.big figcaption{font-family:var(--sans);font-size:12.5px;color:var(--muted);padding:11px 5px 2px;letter-spacing:.6px}
.strip{display:grid;gap:15px}
.strip figure{display:grid;grid-template-columns:92px 1fr;gap:15px;align-items:center;padding:11px}
.strip img{width:92px;height:122px;object-fit:cover;border-radius:12px}
.strip figcaption{font-size:13.4px;color:#4F6A79;letter-spacing:.4px}

/* 指南：五步浮卡 */
.steps{list-style:none;position:relative;margin-top:4px;padding-left:0;max-width:900px}
.steps::before{
  content:"";position:absolute;left:22px;top:12px;bottom:18px;width:2px;
  background:repeating-linear-gradient(180deg,#9FD9EE 0 6px,transparent 6px 12px);
}
.steps li{
  position:relative;margin:0 0 14px;padding:16px 20px 16px 66px;
  background:#fff;border:1px solid #E2F0F8;border-radius:16px;
  font-size:14.3px;color:#46626F;line-height:1.9;list-style:none;
}
.steps li:last-child{margin-bottom:4px}
.steps b{
  position:absolute;left:0;top:50%;margin-top:-20px;width:40px;height:40px;border-radius:50%;
  background:linear-gradient(145deg,#5CC8E8,#2E9FCB);color:#fff;
  display:grid;place-items:center;font-family:var(--sans);
  font-size:12px;font-weight:800;box-shadow:0 6px 14px rgba(58,174,220,.28);
}
.gnote{
  margin-top:18px;max-width:900px;border-left:3px solid var(--pink);
  background:var(--pink-l);border-radius:0 14px 14px 0;padding:13px 18px;
  font-size:13.2px;color:#7A5464;
}

/* 答疑：浮卡条目 */
.qa{display:grid;gap:12px}
.qa-item{
  display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;
  background:#fff;border:1px solid #E2F0F8;border-radius:16px;padding:18px 20px;
}
.qa-item .qn{
  font-family:var(--sans);font-size:12px;font-weight:800;color:var(--sky-d);
  background:var(--sky-l);border-radius:9px;text-align:center;padding:3px 0;margin-top:3px;
}
.qa-item h3{font-family:var(--serif);font-size:17px;letter-spacing:.8px;margin-bottom:7px}
.qa-item p{font-size:13.9px;color:#4F6A79;line-height:1.95}

/* 评价：云朵卡 */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rev-card{
  position:relative;background:#fff;border:1px solid #E2F0F8;border-radius:20px;
  padding:26px 22px 18px;box-shadow:0 8px 24px rgba(29,140,187,.05);
}
.rev-card::before{
  content:"\201C";position:absolute;top:2px;right:14px;font-family:Georgia,serif;
  font-size:60px;line-height:1;color:rgba(240,127,166,.2);
}
.rev-card:nth-child(2){margin-top:14px}
.rev-card blockquote{position:relative;z-index:1;font-size:13.6px;color:#46626F;line-height:2}
.rev-card .who{
  display:flex;align-items:center;gap:8px;margin-top:15px;padding-top:11px;
  border-top:1px dashed #DCEBF4;font-family:var(--sans);font-size:10.8px;color:var(--muted);
}
.rev-card .who i{
  width:23px;height:23px;border-radius:50%;background:var(--pink-l);color:#D85C86;
  font-style:normal;font-size:10.5px;font-weight:800;display:grid;place-items:center;
}
.rev-card .who time{font-family:"SFMono-Regular",Consolas,monospace;letter-spacing:0}

/* ============ 下载：高空蓝 ============ */
.get{
  position:relative;overflow:hidden;padding:72px 0 74px;text-align:center;
  background:
    radial-gradient(560px 380px at 50% -6%,rgba(255,255,255,.9),transparent 72%),
    linear-gradient(180deg,#DDF3FC 0%,#EFF9FE 62%,#FFFFFF 100%);
  border-top:1px solid #E2F0F8;
}
.get::before{
  content:"";position:absolute;left:50%;top:26px;width:440px;height:440px;margin-left:-220px;
  border:1px dashed rgba(58,174,220,.18);border-radius:50%;
}
.get-in{position:relative;z-index:1}
.dlogo{display:flex;align-items:center;justify-content:center;gap:11px;margin-bottom:15px}
.dlogo img{width:46px;height:46px;border-radius:13px;box-shadow:0 8px 20px rgba(240,127,166,.24)}
.dlogo em{font-style:normal;font-family:var(--sans);font-size:10px;letter-spacing:2.6px;color:#6C93A6}
.get h2{font-family:var(--serif);font-size:35px;letter-spacing:3px;margin-bottom:12px;color:var(--ink)}
.get h2 em{
  font-style:normal;
  background:linear-gradient(105deg,#2E9FCB,#F07FA6);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.get p{font-size:14px;color:#4F6A79;max-width:640px;margin:0 auto 22px;line-height:2}
.dm{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:26px}
.dm span{
  font-family:var(--sans);font-size:11px;background:#fff;border:1px solid #CDE9F4;
  border-radius:999px;padding:4px 13px;color:#41606F;
}

/* ============ 页脚 ============ */
.ft{background:#0F2937;color:rgba(226,242,250,.62);padding:38px 0 28px;font-size:12.2px}
.ft-in{display:flex;flex-wrap:wrap;gap:10px 26px;align-items:flex-start;justify-content:space-between}
.ft-brand{display:flex;align-items:center;gap:9px;color:#EAF7FD;font-weight:700;font-size:14px;font-family:var(--serif);letter-spacing:1.4px}
.ft-brand img{width:26px;height:26px;border-radius:8px}
.ft p{max-width:520px;line-height:1.95;color:rgba(226,242,250,.6)}
.ft-links{display:flex;gap:16px;flex-wrap:wrap;font-family:var(--sans);font-size:11.8px}
.ft-links a:hover{color:#8CD8F0}
.ft-copy{width:100%;border-top:1px solid rgba(226,242,250,.14);padding-top:14px;font-size:11px;color:rgba(226,242,250,.42);line-height:1.9}

/* ============ 返回顶部 ============ */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:70;width:42px;height:42px;border-radius:50%;
  background:#fff;border:1px solid #C4E5F3;color:var(--sky-d);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 8px 20px rgba(29,140,187,.16);
  opacity:0;visibility:hidden;transition:opacity .2s ease;
}
.backtop.on{opacity:1;visibility:visible}
.backtop:hover{background:linear-gradient(145deg,#5CC8E8,#2E9FCB);color:#fff;border-color:transparent}

/* ============ 响应式 960 ============ */
@media (max-width:960px){
  .nav{
    display:none;position:absolute;top:72px;left:0;right:0;margin-left:0;
    background:#fff;border-bottom:1px solid var(--line);border-radius:0 0 18px 18px;
    flex-direction:column;gap:0;padding:6px 26px 14px;
    box-shadow:0 16px 30px rgba(29,140,187,.1);
  }
  .nav.open{display:flex}
  .nav a{padding:11px 0;border-bottom:1px solid #EDF6FB}
  .nav a::after{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .cta{padding:9px 15px;font-size:11.5px}
  .hero{padding:50px 0 52px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero h1{font-size:60px}
  .hero .desc{max-width:none}
  .album{max-width:470px;width:100%;height:450px;margin:0 auto}
  .feat-grid{grid-template-columns:1fr 1fr}
  .spread{grid-template-columns:1fr}
  .strip{grid-template-columns:repeat(3,1fr)}
  .strip figure{display:block;padding:10px}
  .strip img{width:100%;height:auto;aspect-ratio:3/4}
  .strip figcaption{display:block;padding-top:8px;font-size:12.4px}
  .rev-grid{grid-template-columns:1fr 1fr}
  .rev-card:nth-child(2){margin-top:0}
  .rev-card:nth-child(3){grid-column:1 / -1}
}

/* ============ 响应式 600 ============ */
@media (max-width:600px){
  body{font-size:15px}
  .wrap{padding:0 18px}
  .top-in{height:62px;gap:10px}
  .brand img{width:32px;height:32px;border-radius:10px}
  .brand-t b{font-size:17px;letter-spacing:1.2px}
  .brand-t small{font-size:9px;letter-spacing:.8px}
  .nav{top:62px;padding:4px 18px 12px}
  .cta{padding:8px 12px;font-size:10.8px}
  .hero{padding:36px 0 40px}
  .hero h1{font-size:46px;letter-spacing:1px}
  .hero .lead{font-size:16.5px}
  .hero .desc{font-size:13.9px}
  .kick{font-size:10px;letter-spacing:2px;padding:5px 12px}
  .facts div{padding:0 12px}
  .facts b{font-size:11.5px}
  .facts span{font-size:10px}
  .album{height:360px;max-width:350px}
  .seal{width:48px;height:48px;font-size:22px;left:-4px}
  .sky-label{display:none}
  .sec{padding:46px 0}
  .hd2{grid-template-columns:1fr;gap:9px;margin-bottom:24px}
  .hd2 .no{display:inline-block;padding:4px 12px;justify-self:start}
  .hd2 h2{font-size:25px;letter-spacing:1.4px}
  .hd2 p{font-size:13.4px}
  .feat-grid{grid-template-columns:1fr}
  .card{padding:20px 18px 22px}
  .strip{grid-template-columns:1fr}
  .strip figure{grid-template-columns:80px 1fr;display:grid;padding:10px}
  .strip img{width:80px;height:106px}
  .steps li{padding:15px 16px 15px 58px;font-size:13.6px}
  .steps::before{left:19px}
  .steps b{width:36px;height:36px;margin-top:-18px;font-size:11px}
  .qa-item{grid-template-columns:42px 1fr;gap:11px;padding:16px}
  .qa-item h3{font-size:15.5px}
  .rev-grid{grid-template-columns:1fr}
  .rev-card:nth-child(3){grid-column:auto}
  .get{padding:48px 0 52px}
  .get::before{width:300px;height:300px;margin-left:-150px}
  .get h2{font-size:26px;letter-spacing:2px}
  .dm span{font-size:10.4px;padding:3px 10px}
  .ft-in{flex-direction:column}
  .backtop{right:14px;bottom:74px;width:38px;height:38px}
}