:root{
  --ink:#22303C;
  --ink-2:#2C3C49;
  --blue:#3498DB;
  --blue-d:#2176AE;
  --blue-l:#DCEBF7;
  --cream:#FBF4E6;
  --cream-2:#FFFBF2;
  --line:#E2D5B9;
  --line-2:#CDBB98;
  --note:#FBE9A8;
  --mint:#CFE8DA;
  --pink:#F6D3CB;
  --muted:#6E6656;
  --hand:"Yuanti SC","Hiragino Sans GB","PingFang SC","Microsoft YaHei",sans-serif;
}
*{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);line-height:1.85;font-size:16px;
  background:
    radial-gradient(rgba(52,152,219,.10) 1px,transparent 1px) 0 0/22px 22px,
    var(--cream);
  -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：便签条 ============ */
.top{
  position:sticky;top:0;z-index:90;background:rgba(255,251,242,.95);
  border-bottom:2px dashed var(--line-2);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.top.on{box-shadow:0 10px 24px rgba(34,48,60,.08)}
.top-in{display:flex;align-items:center;height:70px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand img{width:36px;height:36px;border:1.5px solid var(--line-2);border-radius:8px;transform:rotate(-3deg)}
.brand-t b{display:block;font-family:var(--hand);font-size:20px;letter-spacing:.6px;line-height:1.2;color:var(--ink)}
.brand-t small{display:block;font-size:10px;letter-spacing:1.4px;color:var(--muted);margin-top:3px}
.nav{display:flex;gap:22px;margin-left:auto;font-size:13px;font-weight:600;color:#5A6270}
.nav a{position:relative;padding:5px 2px}
.nav a::after{
  content:"";position:absolute;left:1px;right:1px;bottom:1px;height:6px;
  background:rgba(52,152,219,.22);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav a:hover{color:var(--blue-d)}
.nav a:hover::after{transform:scaleX(1)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;color:var(--ink);padding:4px}
.cta{
  flex:none;background:var(--blue);color:#fff;font-size:12.5px;font-weight:800;letter-spacing:.6px;
  padding:10px 20px;border-radius:10px;box-shadow:0 3px 0 var(--blue-d);transform:rotate(-1deg);
}
.cta:hover{background:var(--blue-d)}

/* ============ 英雄区：便签墙 ============ */
.hero{position:relative;overflow:hidden;padding:58px 0 62px}
.hero::before{
  content:"";position:absolute;left:-140px;top:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(52,152,219,.14),transparent 68%);
}
.hero::after{
  content:"";position:absolute;right:-90px;bottom:-120px;width:420px;height:420px;border-radius:50%;
  border:2px dashed rgba(52,152,219,.22);
}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center;position:relative;z-index:1}
.kick{
  display:inline-flex;align-items:center;gap:9px;font-size:11px;letter-spacing:2.6px;
  color:#5A6270;background:rgba(255,255,255,.7);border:1.5px dashed var(--line-2);
  border-radius:999px;padding:5px 14px;margin-bottom:18px;
}
.kick::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue)}
.hero h1{
  font-family:var(--hand);font-size:78px;font-weight:800;letter-spacing:-.5px;line-height:1;
  display:inline-block;margin-bottom:16px;color:var(--ink);
  background:linear-gradient(transparent 66%,rgba(52,152,219,.32) 66% 90%,transparent 90%);
  padding-bottom:4px;
}
.hero .lead{font-size:19px;font-weight:700;color:#3C4A57;margin-bottom:12px}
.hero .desc{font-size:14.6px;color:#5A6270;max-width:548px;margin-bottom:26px;line-height:2}
.acts{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;
  padding:13px 27px;border-radius:12px;font-weight:800;font-size:15px;
  box-shadow:0 4px 0 var(--blue-d),0 12px 24px rgba(52,152,219,.26);
  transform:rotate(-.6deg);
}
.btn svg{width:17px;height:17px}
.btn:hover{background:var(--blue-d);transform:rotate(0) translateY(1px)}
.ghost{
  display:inline-flex;align-items:center;padding:12px 20px;border-radius:12px;
  border:1.6px dashed var(--blue);color:var(--blue-d);font-size:13.5px;font-weight:700;
  background:rgba(52,152,219,.06);
}
.ghost:hover{background:rgba(52,152,219,.14)}
.facts{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;
}
.facts div{
  background:var(--cream-2);border:1.5px solid var(--line);border-radius:10px;
  padding:8px 14px 9px;box-shadow:0 3px 0 rgba(205,187,152,.5);
}
.facts div:nth-child(1){transform:rotate(-1.2deg)}
.facts div:nth-child(2){transform:rotate(.8deg);background:#F3FAF6;border-color:#BBDCC9}
.facts div:nth-child(3){transform:rotate(-.5deg);background:#FFF6D9;border-color:#EBD98F}
.facts b{display:block;font-size:12.5px;color:var(--ink);letter-spacing:.4px}
.facts span{display:block;font-size:11px;color:var(--muted);margin-top:1px}

/* 拼贴板 */
.board{position:relative;height:496px;z-index:1}
.polaroid{
  position:absolute;background:#fff;padding:9px 9px 30px;margin:0;
  box-shadow:0 18px 36px rgba(34,48,60,.18),0 0 0 1px rgba(205,187,152,.5);
}
.polaroid img{width:100%;height:100%;object-fit:cover;background:#F2EFE6}
.polaroid figcaption{
  position:absolute;left:0;right:0;bottom:7px;text-align:center;
  font-size:11px;color:#7B7A72;letter-spacing:.6px;
}
.polaroid::before{
  content:"";position:absolute;top:-11px;left:50%;width:74px;height:22px;margin-left:-37px;
  background:rgba(251,233,168,.82);box-shadow:0 1px 3px rgba(34,48,60,.1);
}
.po-1{left:2%;top:8%;width:47%;height:66%;transform:rotate(-4deg);z-index:3}
.po-2{right:1%;top:0;width:46%;height:60%;transform:rotate(3deg);z-index:2}
.po-3{right:8%;bottom:0;width:44%;height:52%;transform:rotate(-1.5deg);z-index:4}
.po-1::before{transform:rotate(-4deg)}
.po-2::before{transform:rotate(5deg)}
.po-3::before{transform:rotate(2deg)}
.pin{
  position:absolute;width:16px;height:16px;border-radius:50%;z-index:6;
  background:radial-gradient(circle at 32% 30%,#fff,rgba(52,152,219,.9) 62%,#1F6E9F);
  box-shadow:0 3px 6px rgba(34,48,60,.3);
}
.pin-1{left:22%;top:5%}
.pin-2{right:24%;bottom:4%}
.note{
  position:absolute;font-family:var(--hand);font-size:12.5px;font-weight:700;
  padding:6px 12px;border-radius:4px;box-shadow:0 4px 10px rgba(34,48,60,.14);z-index:7;
  letter-spacing:.4px;
}
.note-a{left:-2%;bottom:18%;background:var(--note);color:#7A6431;transform:rotate(-6deg)}
.note-b{right:-1%;top:52%;background:var(--mint);color:#31614A;transform:rotate(5deg)}

/* ============ 通用区块 ============ */
.sec{padding:64px 0}
.band{
  background:rgba(255,251,242,.82);
  border-top:2px dashed var(--line-2);border-bottom:2px dashed var(--line-2);
}
.hd2{display:grid;grid-template-columns:74px 1fr;gap:16px;align-items:start;margin-bottom:32px}
.hd2 .no{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:10.5px;letter-spacing:.6px;
  color:var(--blue-d);background:var(--blue-l);border-radius:6px;padding:5px 6px;
  text-align:center;white-space:nowrap;transform:rotate(-2deg);
}
.hd2 h2{font-family:var(--hand);font-size:31px;letter-spacing:.6px;margin-bottom:7px}
.hd2 h2::after{
  content:"";display:block;width:54px;height:5px;margin-top:8px;border-radius:3px;
  background:var(--blue);opacity:.42;
}
.hd2 p{font-size:14.4px;color:#5A6270;max-width:800px}

/* 特色：错落便签卡 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  position:relative;background:var(--cream-2);padding:22px 20px 24px;
  border:1.6px solid var(--line);
  border-radius:255px 12px 225px 12px/12px 225px 12px 255px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card::before{
  content:"";position:absolute;top:-9px;left:18px;width:58px;height:18px;
  background:rgba(52,152,219,.18);transform:rotate(-3deg);
}
.card:nth-child(even)::before{background:rgba(251,233,168,.8);transform:rotate(3deg);left:auto;right:18px}
.card:nth-child(odd){transform:rotate(-.5deg)}
.card:nth-child(even){transform:rotate(.6deg)}
.card:nth-child(3n+2){margin-top:26px}
.card .n{
  display:inline-block;font-family:"SFMono-Regular",Consolas,monospace;font-size:10.5px;
  color:var(--blue-d);background:var(--blue-l);border-radius:5px;padding:1px 7px;letter-spacing:1px;
}
.card h4{font-family:var(--hand);font-size:17.5px;letter-spacing:.4px;margin:10px 0 7px}
.card p{font-size:13.4px;color:#55606C;line-height:1.9}
.card:hover{transform:translateY(-4px) rotate(0);border-color:var(--blue);box-shadow:0 16px 30px rgba(34,48,60,.1)}
.card:nth-child(3){background:#FFF8E2;border-color:#EBD98F}
.card:nth-child(4){background:#F2FAF6;border-color:#BBDCC9}

/* 界面：一大图 + 三行小样 */
.spread{display:grid;grid-template-columns:1.06fr .94fr;gap:24px;align-items:start}
.spread figure{margin:0;background:#fff;border:1.6px solid var(--line);border-radius:6px;box-shadow:0 10px 22px rgba(34,48,60,.08)}
.big{padding:10px 10px 6px;transform:rotate(-.8deg)}
.big img{width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top;border:1px solid #EDE6D6}
.big figcaption{font-size:12.4px;color:var(--muted);padding:11px 4px 6px;letter-spacing:.4px}
.strip{display:grid;gap:16px}
.strip figure{display:grid;grid-template-columns:40% 1fr;gap:16px;align-items:center;padding:10px}
.strip figure:nth-child(1){transform:rotate(.6deg)}
.strip figure:nth-child(2){transform:rotate(-.6deg)}
.strip figure:nth-child(3){transform:rotate(.4deg)}
.strip img{width:100%;height:auto;aspect-ratio:1/1;object-fit:cover;object-position:top;border:1px solid #EDE6D6}
.strip figcaption{font-size:13.2px;color:#4E5A66;letter-spacing:.3px}
.strip figcaption::before{
  content:"";display:inline-block;width:7px;height:7px;border-radius:2px;margin-right:8px;
  background:var(--blue);opacity:.65;vertical-align:1px;
}
.strip figcaption::after{
  content:"";display:block;width:44px;height:4px;border-radius:2px;margin-top:8px;
  background:rgba(52,152,219,.22);
}

/* 指南：贴墙五步 */
.steps{list-style:none;position:relative;margin-top:4px;padding-left:0;max-width:880px}
.steps::before{
  content:"";position:absolute;left:19px;top:12px;bottom:20px;width:2px;
  background:repeating-linear-gradient(180deg,var(--line-2) 0 7px,transparent 7px 14px);
}
.steps li{position:relative;padding:0 0 20px 60px;font-size:14.2px;color:#4E5A66;line-height:1.9}
.steps li:last-child{padding-bottom:4px}
.steps b{
  position:absolute;left:0;top:-2px;width:40px;height:40px;border-radius:50%;
  background:var(--cream-2);border:1.8px solid var(--blue);color:var(--blue-d);
  display:grid;place-items:center;font-family:"SFMono-Regular",Consolas,monospace;
  font-size:12px;font-weight:800;box-shadow:0 3px 0 rgba(52,152,219,.2);
}
.steps li:nth-child(3) b{background:var(--note);border-color:#D9BC5E;color:#6E5926}
.steps li:nth-child(3){background:rgba(251,233,168,.28);border-radius:6px;padding-top:8px;padding-bottom:8px;margin-bottom:12px}
.gnote{
  margin-top:18px;max-width:880px;border:1.5px dashed var(--line-2);border-left:5px solid var(--blue);
  background:rgba(52,152,219,.06);border-radius:4px;padding:12px 16px;
  font-size:13px;color:#5A6270;
}

/* 答疑：便签问答 */
.qa{display:grid;gap:12px}
.qa-item{
  display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;
  background:var(--cream-2);border:1.5px solid var(--line);border-radius:6px;
  padding:18px 20px;box-shadow:0 3px 0 rgba(205,187,152,.4);
}
.qa-item:nth-child(2){background:#FFF8E2;border-color:#EBD98F;transform:rotate(.3deg)}
.qa-item:nth-child(4){background:#F2FAF6;border-color:#BBDCC9;transform:rotate(-.3deg)}
.qa-item .qn{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:12px;color:var(--blue-d);
  background:var(--blue-l);border-radius:6px;text-align:center;padding:3px 0;letter-spacing:.5px;
  transform:rotate(-3deg);
}
.qa-item h3{font-family:var(--hand);font-size:16.5px;letter-spacing:.3px;margin:2px 0 6px}
.qa-item p{font-size:13.8px;color:#55606C;line-height:1.9}

/* 评价：三张作业纸 */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rev-card{
  position:relative;background:#fff;border:1.6px solid var(--line);border-radius:6px;
  padding:26px 20px 16px;box-shadow:0 10px 22px rgba(34,48,60,.07);
}
.rev-card::after{
  content:"";position:absolute;top:-8px;right:22px;width:46px;height:16px;
  background:rgba(52,152,219,.2);transform:rotate(4deg);
}
.rev-card::before{
  content:"\201C";position:absolute;top:2px;left:14px;font-family:Georgia,serif;
  font-size:54px;line-height:1;color:rgba(52,152,219,.18);
}
.rev-card:nth-child(1){transform:rotate(-.7deg)}
.rev-card:nth-child(2){margin-top:16px;transform:rotate(.6deg);background:#FFFCF0}
.rev-card:nth-child(3){transform:rotate(-.3deg)}
.rev-card blockquote{position:relative;z-index:1;font-size:13.4px;color:#4E5A66;line-height:1.95}
.rev-card .who{
  display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:10px;
  border-top:1.5px dashed var(--line);font-size:10.8px;color:var(--muted);
}
.rev-card .who i{
  width:23px;height:23px;border-radius:50%;background:var(--blue-l);color:var(--blue-d);
  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：蓝板 ============ */
.get{
  position:relative;overflow:hidden;padding:62px 0 66px;color:#F2F8FD;text-align:center;
  background:
    radial-gradient(rgba(255,255,255,.13) 1.4px,transparent 1.4px) 0 0/20px 20px,
    linear-gradient(165deg,#3D9BD9 0%,#2878B0 58%,#1F5E8E 100%);
}
.get::before{
  content:"";position:absolute;left:-60px;top:-70px;width:300px;height:300px;border-radius:50%;
  border:2px dashed rgba(255,255,255,.22);
}
.get::after{
  content:"";position:absolute;right:-40px;bottom:-90px;width:340px;height:340px;border-radius:50%;
  border:2px dashed rgba(255,255,255,.18);
}
.get-in{position:relative;z-index:1}
.dlogo{display:flex;align-items:center;justify-content:center;gap:11px;margin-bottom:14px}
.dlogo img{width:46px;height:46px;border-radius:9px;border:1.5px solid rgba(255,255,255,.5);background:#fff;transform:rotate(-3deg)}
.dlogo em{font-style:normal;font-size:10px;letter-spacing:3px;color:rgba(255,255,255,.7)}
.get h2{
  font-family:var(--hand);font-size:35px;letter-spacing:1px;margin-bottom:11px;color:#fff;
}
.get h2 em{font-style:normal;color:var(--note);font-weight:800}
.get p{font-size:13.9px;color:rgba(242,248,253,.82);max-width:640px;margin:0 auto 20px;line-height:1.95}
.dm{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:26px}
.dm span{
  font-size:11px;border:1.5px dashed rgba(255,255,255,.45);border-radius:999px;
  padding:3px 12px;color:rgba(255,255,255,.9);background:rgba(255,255,255,.08);
}
.get .btn{background:#fff;color:var(--blue-d);box-shadow:0 4px 0 rgba(31,94,142,.55),0 12px 26px rgba(0,0,0,.2);transform:rotate(-.6deg)}
.get .btn:hover{background:var(--note);color:#3E3220}

/* ============ 页脚 ============ */
.ft{background:#1E2A33;color:rgba(242,248,253,.62);padding:34px 0 26px;font-size:12.2px;border-top:5px solid var(--blue)}
.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:#F2F8FD;font-weight:700;font-size:14px;font-family:var(--hand);letter-spacing:.6px}
.ft-brand img{width:26px;height:26px;border:1px solid rgba(255,255,255,.3);border-radius:6px}
.ft p{max-width:520px;line-height:1.9;color:rgba(242,248,253,.6)}
.ft-links{display:flex;gap:16px;flex-wrap:wrap;font-size:11.8px}
.ft-links a:hover{color:var(--note)}
.ft-copy{width:100%;border-top:1px solid rgba(242,248,253,.16);padding-top:13px;font-size:11px;color:rgba(242,248,253,.45);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:1.6px solid var(--line-2);color:var(--ink);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:0 6px 16px rgba(34,48,60,.16);
  opacity:0;visibility:hidden;transition:opacity .2s ease;
}
.backtop.on{opacity:1;visibility:visible}
.backtop:hover{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ============ 响应式 960 ============ */
@media (max-width:960px){
  .nav{
    display:none;position:absolute;top:70px;left:0;right:0;margin-left:0;
    background:var(--cream-2);border-bottom:2px dashed var(--line-2);
    flex-direction:column;gap:0;padding:6px 26px 12px;
  }
  .nav.open{display:flex}
  .nav a{padding:10px 0;border-bottom:1px solid rgba(226,213,185,.8)}
  .nav a::after{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .cta{padding:9px 14px;font-size:11.5px}
  .hero{padding:44px 0 50px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:64px}
  .hero .desc{max-width:none}
  .board{max-width:470px;width:100%;height:452px;margin:0 auto}
  .feat-grid{grid-template-columns:1fr 1fr}
  .card:nth-child(3n+2){margin-top:0}
  .card:nth-child(even){margin-top:20px}
  .spread{grid-template-columns:1fr}
  .big{transform:none}
  .strip{grid-template-columns:repeat(3,1fr)}
  .strip figure{display:block;padding:9px;transform:none}
  .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}
  .brand-t b{font-size:17px}
  .brand-t small{font-size:9px;letter-spacing:1px}
  .nav{top:62px;padding:4px 18px 10px}
  .cta{padding:8px 11px;font-size:10.8px}
  .hero{padding:32px 0 40px}
  .hero h1{font-size:48px}
  .hero .lead{font-size:16.5px}
  .hero .desc{font-size:13.8px}
  .kick{font-size:10px;letter-spacing:1.6px;padding:4px 11px}
  .facts{gap:8px}
  .facts div{padding:7px 10px 8px}
  .facts b{font-size:11.5px}
  .facts span{font-size:10px}
  .board{height:380px;max-width:340px}
  .polaroid{padding:7px 7px 24px}
  .polaroid figcaption{font-size:9.5px;bottom:5px}
  .note{font-size:11px;padding:4px 9px}
  .sec{padding:42px 0}
  .hd2{grid-template-columns:1fr;gap:8px;margin-bottom:22px}
  .hd2 .no{display:inline-block;justify-self:start}
  .hd2 h2{font-size:24px}
  .hd2 p{font-size:13.4px}
  .feat-grid{grid-template-columns:1fr}
  .card{padding:18px 16px 20px;transform:none}
  .card:nth-child(even){margin-top:0}
  .strip{grid-template-columns:1fr}
  .strip figure{grid-template-columns:104px 1fr;display:grid;padding:9px}
  .strip img{width:104px;height:138px}
  .steps li{padding-left:50px;font-size:13.6px}
  .steps::before{left:16px}
  .steps b{width:34px;height:34px;font-size:11px}
  .qa-item{grid-template-columns:40px 1fr;gap:10px;padding:15px 14px;transform:none}
  .qa-item h3{font-size:15.5px}
  .rev-grid{grid-template-columns:1fr}
  .rev-card:nth-child(3){grid-column:auto}
  .rev-card:nth-child(1),.rev-card:nth-child(2),.rev-card:nth-child(3){transform:none}
  .get{padding:44px 0 48px}
  .get h2{font-size:26px}
  .dm span{font-size:10.4px;padding:2px 10px}
  .ft-in{flex-direction:column}
  .backtop{right:14px;bottom:74px;width:38px;height:38px}
}