:root{
  --sea:#0E86A8;
  --sea-d:#0A6478;
  --sea-l:#D6F2F7;
  --mint:#2FC9A6;
  --mint-d:#1FA98A;
  --mint-l:#E2FAF3;
  --coral:#E8380D;
  --coral-d:#C22C08;
  --ink:#0B2C34;
  --body:#3E6470;
  --muted:#5C7F89;
  --line:#CFE9EE;
  --glass:rgba(255,255,255,.64);
  --paper:#F7FDFC;
  --paper-2:#FBFFFE;
  --radius:22px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);background:var(--paper);line-height:1.85;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：玻璃 + 海蓝 ============ */
.top{
  position:sticky;top:0;z-index:90;
  background:rgba(247,253,252,.82);
  border-bottom:1px solid rgba(207,233,238,.9);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);backdrop-filter:blur(14px) saturate(1.2);
}
.top.on{box-shadow:0 10px 26px rgba(10,100,120,.1)}
.top-in{display:flex;align-items:center;height:72px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand img{width:38px;height:38px;border-radius:11px;box-shadow:0 4px 12px rgba(232,56,13,.18)}
.brand-t b{display:block;font-size:18px;letter-spacing:1.6px;line-height:1.2}
.brand-t small{display:block;font-size:10px;letter-spacing:1.2px;color:var(--muted);margin-top:3px}
.nav{display:flex;gap:22px;margin-left:auto;font-size:13px;font-weight:600;color:#3F6470}
.nav a{position:relative;padding:6px 2px;border-radius:999px;transition:color .2s ease}
.nav a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:1px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--sea),var(--mint));transition:left .22s ease,right .22s ease;
}
.nav a:hover{color:var(--sea-d)}
.nav a:hover::after{left:6px;right:6px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;color:var(--ink);padding:4px}
.cta{
  flex:none;color:#fff;font-size:12.5px;font-weight:800;letter-spacing:.6px;
  padding:10px 20px;border-radius:999px;
  background:linear-gradient(120deg,#D62F0B,#EA5A2E);
  box-shadow:0 8px 18px rgba(214,47,11,.26);
}
.cta:hover{filter:brightness(.95)}

/* ============ 英雄区：海岛晨光 ============ */
.hero{
  position:relative;overflow:hidden;padding:62px 0 118px;
  background:
    radial-gradient(720px 430px at 84% 6%,rgba(47,201,166,.3),transparent 68%),
    radial-gradient(640px 480px at 4% 92%,rgba(14,134,168,.18),transparent 72%),
    linear-gradient(155deg,#E7FAFF 0%,#F1FDF8 54%,#E2F8F2 100%);
}
.hero::before{
  content:"";position:absolute;left:-90px;top:-120px;width:360px;height:360px;border-radius:50%;
  border:1px dashed rgba(14,134,168,.18);
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;position:relative;z-index:2}
.kick{
  display:inline-flex;align-items:center;gap:9px;font-size:11px;letter-spacing:2.6px;
  color:var(--sea-d);background:rgba(255,255,255,.66);border:1px solid rgba(255,255,255,.9);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
  box-shadow:0 6px 16px rgba(10,100,120,.08);
}
.kick::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--coral)}
.hero h1{
  font-size:60px;letter-spacing:4px;line-height:1.1;margin-bottom:12px;
  color:#0A3B47;font-weight:800;
}
.hero h1 span{color:var(--sea);background:linear-gradient(120deg,var(--sea),var(--mint));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .lead{font-size:18.5px;font-weight:700;color:#1B5563;margin-bottom:12px}
.hero .desc{font-size:14.6px;color:#466C77;max-width:548px;margin-bottom:26px;line-height:2}
.acts{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;color:#fff;
  padding:14px 30px;border-radius:999px;font-weight:800;font-size:15px;
  background:linear-gradient(120deg,#0C7387,#1F9E86);
  box-shadow:0 12px 26px rgba(10,100,120,.3);
  transition:transform .18s ease,box-shadow .18s ease;
}
.btn svg{width:17px;height:17px}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(14,134,168,.4)}
.ghost{
  display:inline-flex;align-items:center;padding:13px 22px;border-radius:999px;
  background:rgba(255,255,255,.7);border:1px solid rgba(14,134,168,.28);
  color:var(--sea-d);font-size:13.5px;font-weight:700;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.ghost:hover{background:#fff;border-color:var(--mint)}
.facts{
  display:flex;flex-wrap:wrap;margin-top:30px;padding-top:16px;
  border-top:1px solid rgba(14,134,168,.18);
}
.facts div{padding:0 22px;border-left:1px solid rgba(14,134,168,.16)}
.facts div:first-child{padding-left:0;border-left:0}
.facts b{display:block;font-size:12.5px;color:#14505E;letter-spacing:.5px}
.facts span{display:block;font-size:11px;color:var(--muted);margin-top:2px}

/* 海岛叠卡 */
.island{position:relative;height:500px;z-index:1}
.island .sun{
  position:absolute;right:6%;top:2%;width:112px;height:112px;border-radius:50%;
  background:radial-gradient(circle at 36% 34%,#FFE9C9,#FFC27A 68%,#FFB05C);
  box-shadow:0 0 0 18px rgba(255,206,150,.22),0 0 46px rgba(255,176,92,.32);
}
.ph{
  position:absolute;margin:0;padding:7px;border-radius:26px;
  background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.96);
  box-shadow:0 24px 48px rgba(8,80,96,.22);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.ph img{width:100%;height:100%;object-fit:cover;border-radius:20px}
.pa{left:2%;top:9%;width:48%;height:62%;transform:rotate(-4deg);z-index:2}
.pb{left:29%;top:1%;width:46%;height:60%;transform:rotate(2.4deg);z-index:3}
.pc{right:1%;bottom:4%;width:44%;height:58%;transform:rotate(-1.6deg);z-index:4}
.chip{
  position:absolute;left:0;bottom:11%;z-index:6;
  background:rgba(255,255,255,.86);border:1px solid rgba(255,255,255,.96);
  border-radius:999px;padding:9px 16px;font-size:10.5px;color:var(--muted);
  box-shadow:0 12px 24px rgba(8,80,96,.16);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.chip b{display:block;font-size:12px;color:#11505E;letter-spacing:.4px}
.stamp{
  position:absolute;right:2%;bottom:0;width:60px;height:60px;border-radius:50%;
  display:grid;place-items:center;z-index:6;
  background:linear-gradient(140deg,#FF7A45,var(--coral));color:#fff;
  font-size:25px;font-weight:800;
  box-shadow:0 10px 22px rgba(232,56,13,.3),inset 0 0 0 3px rgba(255,255,255,.32);
}
.wave{position:absolute;left:0;right:0;bottom:-1px;width:100%;height:96px;z-index:3;display:block}

/* ============ 通用区块 ============ */
.sec{padding:66px 0;background:var(--paper-2)}
.band{
  background:
    radial-gradient(600px 320px at 88% 0%,rgba(47,201,166,.12),transparent 70%),
    linear-gradient(180deg,#EEFBF8,#F4FDFB);
  border-top:1px solid rgba(207,233,238,.7);border-bottom:1px solid rgba(207,233,238,.7);
}
.hd2{display:grid;grid-template-columns:110px 1fr;gap:16px;align-items:start;margin-bottom:30px}
.hd2 .no{
  display:inline-block;font-size:10.5px;letter-spacing:1px;font-weight:700;color:var(--sea-d);
  background:rgba(255,255,255,.8);border:1px solid rgba(14,134,168,.24);
  padding:5px 10px;border-radius:999px;text-align:center;white-space:nowrap;
}
.hd2 h2{font-size:31px;letter-spacing:1.6px;margin-bottom:7px;color:#0A3B47}
.hd2 p{font-size:14.4px;color:var(--muted);max-width:800px}

/* 特色：轻玻璃卡 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  position:relative;padding:22px 22px 24px;border-radius:var(--radius);
  background:rgba(255,255,255,.62);border:1px solid rgba(255,255,255,.9);
  box-shadow:0 14px 30px rgba(10,100,120,.08),inset 0 1px 0 #fff;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card .n{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;
  font-size:11.5px;font-weight:800;color:#fff;
  background:linear-gradient(140deg,var(--sea),var(--mint));
  box-shadow:0 6px 14px rgba(14,134,168,.24);
}
.card h4{font-size:17.5px;letter-spacing:.8px;margin:12px 0 7px;color:#104752}
.card p{font-size:13.4px;color:var(--body);line-height:1.9}
.card:hover{transform:translateY(-4px);border-color:rgba(47,201,166,.5);box-shadow:0 20px 38px rgba(10,100,120,.13)}

/* 界面：大图 + 三行 */
.spread{display:grid;grid-template-columns:1.08fr .92fr;gap:20px;align-items:start}
.spread figure{margin:0;border-radius:var(--radius);overflow:hidden;background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.92);box-shadow:0 16px 34px rgba(10,100,120,.1)}
.big{padding:10px}
.big img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:16px}
.big figcaption{font-size:12.5px;color:var(--muted);padding:10px 6px 2px;letter-spacing:.5px}
.strip{display:grid;gap:14px}
.strip figure{display:grid;grid-template-columns:88px 1fr;gap:14px;align-items:center;padding:10px}
.strip img{width:88px;height:118px;object-fit:cover;object-position:center top;border-radius:12px}
.strip figcaption{font-size:13.2px;color:#3E6470;letter-spacing:.4px}

/* 指南：五步 */
.steps{list-style:none;position:relative;margin-top:4px;padding-left:0;max-width:880px}
.steps::before{
  content:"";position:absolute;left:20px;top:10px;bottom:18px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--sea),var(--mint),rgba(47,201,166,.12));
}
.steps li{position:relative;padding:0 0 22px 62px;font-size:14.2px;color:#3E6470;line-height:1.9}
.steps li:last-child{padding-bottom:4px}
.steps b{
  position:absolute;left:0;top:-1px;width:42px;height:42px;border-radius:50%;
  background:#fff;border:2px solid rgba(14,134,168,.32);color:var(--sea-d);
  display:grid;place-items:center;font-size:12px;font-weight:800;
  box-shadow:0 6px 14px rgba(10,100,120,.1);
}
.gnote{
  margin-top:16px;max-width:880px;border-radius:14px;
  border-left:3px solid var(--mint);background:rgba(47,201,166,.1);
  padding:12px 16px;font-size:13px;color:#3D6A66;
}

/* 答疑：玻璃条目 */
.qa{display:grid;gap:12px}
.qa-item{
  display:grid;grid-template-columns:58px 1fr;gap:14px;align-items:start;
  padding:18px 20px;border-radius:18px;
  background:rgba(255,255,255,.66);border:1px solid rgba(255,255,255,.94);
  box-shadow:0 10px 22px rgba(10,100,120,.06);
}
.qa-item .qn{
  display:grid;place-items:center;width:34px;height:34px;border-radius:50%;
  background:var(--sea-l);color:var(--sea-d);font-size:11px;font-weight:800;
}
.qa-item h3{font-size:16.5px;letter-spacing:.6px;margin-bottom:6px;color:#104752}
.qa-item p{font-size:13.8px;color:#3E6470;line-height:1.9}

/* 评价：海盐卡 */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rev-card{
  position:relative;padding:24px 20px 16px;border-radius:var(--radius);
  background:rgba(255,255,255,.7);border:1px solid rgba(255,255,255,.94);
  box-shadow:0 16px 32px rgba(10,100,120,.09);
}
.rev-card::before{
  content:"\201C";position:absolute;top:2px;right:14px;font-family:Georgia,serif;
  font-size:60px;line-height:1;color:rgba(47,201,166,.22);
}
.rev-card:nth-child(2){margin-top:14px}
.rev-card blockquote{position:relative;z-index:1;font-size:13.4px;color:#3E6470;line-height:1.95}
.rev-card .who{
  display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:10px;
  border-top:1px dashed rgba(207,233,238,.95);font-size:10.8px;color:var(--muted);
}
.rev-card .who i{
  width:23px;height:23px;border-radius:50%;font-style:normal;font-size:10.5px;font-weight:800;
  color:#0C5A66;background:linear-gradient(140deg,var(--sea-l),var(--mint-l));
  display:grid;place-items:center;
}
.rev-card .who time{font-family:"SFMono-Regular",Consolas,monospace;letter-spacing:0}

/* ============ 下载：深海 ============ */
.get{
  position:relative;overflow:hidden;padding:66px 0 72px;color:#EAF9FB;text-align:center;
  background:
    radial-gradient(560px 360px at 50% 0%,rgba(47,201,166,.35),transparent 72%),
    radial-gradient(620px 300px at 12% 100%,rgba(14,134,168,.55),transparent 70%),
    linear-gradient(160deg,#063F4E 0%,#075364 58%,#0A6478 100%);
}
.get::before{
  content:"";position:absolute;left:50%;top:14px;width:430px;height:430px;margin-left:-215px;
  border:1px dashed rgba(190,240,232,.24);border-radius:50%;
}
.get::after{
  content:"";position:absolute;left:-60px;bottom:-120px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,201,166,.22),transparent 68%);
}
.get-in{position:relative;z-index:2}
.dlogo{display:flex;align-items:center;justify-content:center;gap:11px;margin-bottom:14px}
.dlogo img{width:46px;height:46px;border-radius:13px;border:1px solid rgba(190,240,232,.5);box-shadow:0 8px 18px rgba(0,0,0,.24)}
.dlogo em{font-style:normal;font-size:10px;letter-spacing:3px;color:rgba(190,240,232,.72)}
.get h2{font-size:34px;letter-spacing:2.6px;margin-bottom:11px;color:#F2FEFF}
.get h2 em{
  font-style:normal;
  background:linear-gradient(120deg,#8FF0DA,#6FD8EE);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.get p{font-size:13.9px;color:rgba(234,249,251,.76);max-width:640px;margin:0 auto 20px;line-height:1.95}
.dm{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:24px}
.dm span{
  font-size:11px;border:1px solid rgba(190,240,232,.32);border-radius:999px;
  padding:4px 13px;color:rgba(234,249,251,.86);
  background:rgba(255,255,255,.06);
}
.get .btn{box-shadow:0 12px 28px rgba(0,0,0,.34)}

/* ============ 页脚 ============ */
.ft{background:#06323D;color:rgba(234,249,251,.62);padding:36px 0 26px;font-size:12.2px;border-top:3px solid var(--mint)}
.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:#EAF9FB;font-weight:700;font-size:13.5px;letter-spacing:1.4px}
.ft-brand img{width:26px;height:26px;border-radius:8px;border:1px solid rgba(190,240,232,.3)}
.ft p{max-width:520px;line-height:1.9;color:rgba(234,249,251,.6)}
.ft-links{display:flex;gap:16px;flex-wrap:wrap;font-size:11.8px}
.ft-links a:hover{color:#8FF0DA}
.ft-copy{width:100%;border-top:1px solid rgba(190,240,232,.16);padding-top:13px;font-size:11px;color:rgba(234,249,251,.44);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:rgba(255,255,255,.9);border:1px solid rgba(14,134,168,.28);color:var(--sea-d);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 8px 20px rgba(10,100,120,.18);
  opacity:0;visibility:hidden;transition:opacity .2s ease;
}
.backtop.on{opacity:1;visibility:visible}
.backtop:hover{background:var(--sea);color:#fff;border-color:var(--sea)}

/* ============ 响应式 960 ============ */
@media (max-width:960px){
  .nav{
    display:none;position:absolute;top:72px;left:0;right:0;margin-left:0;
    background:rgba(251,255,254,.98);border-bottom:1px solid var(--line);
    flex-direction:column;gap:0;padding:6px 26px 12px;
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  }
  .nav.open{display:flex}
  .nav a{padding:11px 0;border-bottom:1px solid rgba(207,233,238,.7)}
  .nav a::after{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .cta{padding:9px 14px;font-size:11.5px}
  .hero{padding:46px 0 104px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:50px}
  .hero .desc{max-width:none}
  .island{max-width:460px;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:9px}
  .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:16px;letter-spacing:1.2px}
  .brand-t small{font-size:9px;letter-spacing:.8px}
  .nav{top:62px;padding:4px 18px 10px}
  .cta{padding:8px 12px;font-size:10.8px}
  .hero{padding:34px 0 82px}
  .hero h1{font-size:40px;letter-spacing:3px}
  .hero .lead{font-size:16.5px}
  .hero .desc{font-size:13.8px}
  .hero::before{display:none}
  .facts div{padding:0 12px}
  .facts b{font-size:11.5px}
  .facts span{font-size:10px}
  .island{height:390px;max-width:350px}
  .island .sun{width:82px;height:82px;right:4%}
  .chip{font-size:9.6px;padding:7px 12px}
  .chip b{font-size:10.8px}
  .stamp{width:48px;height:48px;font-size:20px}
  .wave{height:64px}
  .sec{padding:42px 0}
  .hd2{grid-template-columns:1fr;gap:8px;margin-bottom:22px}
  .hd2 h2{font-size:24px;letter-spacing:1px}
  .hd2 p{font-size:13.4px}
  .feat-grid{grid-template-columns:1fr}
  .card{padding:18px 16px 20px}
  .strip{grid-template-columns:1fr}
  .strip figure{grid-template-columns:78px 1fr;display:grid;padding:9px}
  .strip img{width:78px;height:104px}
  .steps li{padding-left:52px;font-size:13.6px}
  .steps::before{left:17px}
  .steps b{width:36px;height:36px;font-size:11px}
  .qa-item{grid-template-columns:44px 1fr;gap:10px;padding:16px 14px}
  .qa-item h3{font-size:15.5px}
  .rev-grid{grid-template-columns:1fr}
  .rev-card:nth-child(3){grid-column:auto}
  .get{padding:46px 0 50px}
  .get::before{width:300px;height:300px;margin-left:-150px}
  .get h2{font-size:25px;letter-spacing:1.6px}
  .dm span{font-size:10.4px;padding:3px 10px}
  .ft-in{flex-direction:column}
  .backtop{right:14px;bottom:74px;width:38px;height:38px}
}