:root{--f:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;--bg:#F3EFE6;--bg2:#E9E3D4;--ink:#0F1F1F;--t2:#3B4F51;--t3:#53676A;--p:#0B6E6E;--pd:#06343A;--ps:#DCF0EB;--gold:#C7902A;--gs:#FBF0D6;--red:#B93A22;--line:#DCE3E0;
--hero:radial-gradient(120% 90% at 92% -10%,rgba(127,227,214,.55),transparent 55%),radial-gradient(70% 60% at 0% 0%,rgba(247,216,138,.30),transparent 60%),radial-gradient(80% 70% at 10% 120%,rgba(224,87,59,.22),transparent 60%),linear-gradient(165deg,#0A585C,#0B6466 48%,#073F43)}
html,body{overflow-x:clip}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}
body{font-family:var(--f);background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}img{display:block;max-width:100%}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.noise:after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.12;mix-blend-mode:overlay;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}
/* nav */
.nav{position:fixed;top:14px;left:50%;transform:translateX(-50%);width:min(1200px,calc(100% - 24px));z-index:50;display:flex;align-items:center;gap:28px;padding:10px 10px 10px 18px;border-radius:999px;background:rgba(243,239,230,.82);backdrop-filter:blur(16px) saturate(1.4);box-shadow:0 10px 40px -12px rgba(6,52,58,.35),inset 0 0 0 1px rgba(255,255,255,.6)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}.brand img{width:34px;height:34px}
.brand small{font-weight:500;font-size:12px;color:var(--t3);border-left:1px solid var(--line);padding-left:10px}
.nav nav{display:flex;gap:24px;font-size:14.5px;font-weight:600;color:var(--t2);margin-left:auto}.nav nav a:hover{color:var(--p)}
.btn{display:inline-flex;align-items:center;gap:10px;height:46px;padding:0 22px;border-radius:999px;font-weight:700;font-size:15px;transition:.25s;cursor:pointer;border:0}
.btn-d{background:var(--pd);color:#fff}.btn-d:hover{background:var(--p);transform:translateY(-2px)}
.btn-g{background:linear-gradient(180deg,#F7D88A,#E2B154);color:#3B2604;box-shadow:0 10px 30px -8px rgba(226,177,84,.8),inset 0 1px 0 rgba(255,255,255,.6);height:56px;padding:0 10px 0 28px;font-size:16px}
.btn-g i{width:38px;height:38px;border-radius:50%;background:#3B2604;color:#F7D88A;display:grid;place-items:center;font-style:normal}
.btn-g:hover{transform:translateY(-3px);box-shadow:0 18px 40px -10px rgba(226,177,84,.9)}
.btn-o{color:#fff;border:1.5px solid rgba(255,255,255,.4);height:56px}.btn-o:hover{background:rgba(255,255,255,.1)}
/* hero */
.hero{position:relative;background:var(--hero);color:#fff;padding:150px 0 220px;overflow:hidden;border-radius:0 0 48px 48px}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center;position:relative;z-index:2}
.eyebrow{display:inline-flex;gap:8px;align-items:center;font-size:13px;font-weight:700;padding:6px 14px 6px 8px;border-radius:999px;background:rgba(255,255,255,.12);box-shadow:inset 0 0 0 1px rgba(255,255,255,.22)}
.eyebrow b{background:#F7D88A;color:#3B2604;border-radius:999px;padding:2px 9px;font-size:12px}
h1{font-size:clamp(42px,6.2vw,80px);line-height:1.08;font-weight:900;letter-spacing:-.02em;margin:22px 0}
h1 em{font-style:normal;background:linear-gradient(90deg,#F7D88A,#FFF3D0 40%,#7FE3D6);-webkit-background-clip:text;color:transparent}
.hero p.lead{font-size:19px;color:rgba(255,255,255,.86);max-width:520px}
.cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.trust{margin-top:34px;display:flex;gap:22px;font-size:13.5px;color:rgba(255,255,255,.75);flex-wrap:wrap}.trust span:before{content:"✓ ";color:#F7D88A;font-weight:900}
.stage{position:relative;height:560px}
.stage .bird{position:absolute;right:-140px;top:-120px;width:640px;opacity:.95;filter:drop-shadow(0 30px 60px rgba(0,0,0,.35));animation:float 7s ease-in-out infinite}
.stage .ring{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.14)}
.phone{position:absolute;border-radius:30px;overflow:hidden;box-shadow:0 40px 80px -20px rgba(0,20,22,.6),0 0 0 6px rgba(255,255,255,.12)}
.stage .p1{width:250px;left:10px;top:120px;transform:rotate(-6deg);animation:float 8s ease-in-out infinite reverse}
.stage .p2{width:250px;left:220px;top:40px;transform:rotate(4deg);animation:float 9s ease-in-out infinite}
.chip{position:absolute;display:flex;align-items:center;gap:10px;background:#fff;color:var(--ink);padding:10px 14px;border-radius:16px;font-size:13px;font-weight:700;box-shadow:0 20px 40px -12px rgba(0,0,0,.4);animation:float 6s ease-in-out infinite;z-index:3}
.chip small{display:block;font-weight:500;color:var(--t3);font-size:11.5px}
.chip .ic{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-size:17px}
.c1{left:-30px;top:40px}.c2{right:0;bottom:60px;animation-delay:-2s}.c3{left:120px;bottom:-10px;animation-delay:-4s}
.cloud{position:absolute;opacity:.35;animation:drift 40s linear infinite}
@keyframes float{50%{translate:0 -14px}}@keyframes drift{from{translate:-10vw}to{translate:110vw}}
/* marquee */
.marq{background:var(--pd);color:#F7D88A;overflow:hidden;white-space:nowrap;padding:16px 0;font-weight:800;font-size:20px;transform:rotate(-2deg);margin:0 -20px;box-shadow:0 20px 50px -20px rgba(0,0,0,.5)}
.marq div{display:inline-block;animation:mq 30s linear infinite}.marq span{margin:0 26px}.marq span:nth-child(even){color:#7FE3D6}
@keyframes mq{to{transform:translateX(-50%)}}
section{padding:110px 0}
.kick{font-size:13px;font-weight:800;letter-spacing:.18em;color:var(--p)}
h2{font-size:clamp(32px,4.4vw,56px);line-height:1.15;font-weight:900;letter-spacing:-.02em;margin:12px 0 18px}
.sub{font-size:18px;color:var(--t2);max-width:640px}
/* surfaces */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:56px}
.sf{border-radius:32px;padding:16px 16px 30px;position:relative;transition:.35s;box-shadow:0 30px 60px -30px rgba(6,52,58,.45)}
.sf:hover{transform:translateY(-8px) rotate(-.5deg)}
.sf .shot{height:300px;border-radius:22px;overflow:hidden;position:relative;background:#fff}
.sf .shot img{width:100%;height:100%;object-fit:cover;object-position:top}
.sf h3{font-size:28px;font-weight:900;margin:22px 14px 6px}.sf p{margin:0 14px;color:var(--t2)}.sf .n{margin:18px 14px 0;font-weight:800;font-size:13px;opacity:.6}
.s1{background:linear-gradient(160deg,#DCF0EB,#A7DCD2)}.s2{background:linear-gradient(160deg,#FBF0D6,#F1D08C)}.s3{background:linear-gradient(160deg,#E7E1F8,#C9BFF0)}
/* inbox dark */
.inbox{background:var(--pd);border-radius:44px;color:#fff;padding:70px;display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:center;position:relative;overflow:hidden;box-shadow:0 50px 100px -40px rgba(6,52,58,.7)}
.inbox h2{color:#fff}.inbox .sub{color:rgba(255,255,255,.75)}.inbox .kick{color:#F7D88A}
.browser{background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 40px 80px -20px rgba(0,0,0,.6);transform:perspective(1400px) rotateY(-10deg) rotateX(4deg);transition:.6s}.browser:hover{transform:none}
.browser .bar{height:34px;background:#EEF2F1;display:flex;gap:7px;align-items:center;padding:0 14px}.browser .bar i{width:11px;height:11px;border-radius:50%;background:#E0573B}.browser .bar i+i{background:#E2B154}.browser .bar i+i+i{background:#2F9C93}
.browser .bar span{margin-left:14px;font-size:12px;color:var(--t3);background:#fff;border-radius:8px;padding:2px 12px}
.glow{position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(127,227,214,.35),transparent 70%);right:-120px;top:-150px}
/* feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.split.rev>:first-child{order:2}
.feat-list{margin-top:28px;display:grid;gap:14px}
.fi{display:flex;gap:16px;padding:16px 18px;background:#fff;border-radius:20px;box-shadow:0 12px 30px -18px rgba(6,52,58,.4);transition:.25s}.fi:hover{transform:translateX(6px)}
.fi .ic{flex:none;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:22px}
.fi b{display:block;font-size:16px}.fi span{font-size:14px;color:var(--t2)}
.visual{position:relative;min-height:560px;display:grid;place-items:center}
.blob{position:absolute;inset:6% 4%;border-radius:48px;background:var(--hero);box-shadow:0 40px 80px -30px rgba(6,52,58,.6)}
.visual .phone{position:relative;width:270px}
.visual .pa{transform:rotate(-5deg) translate(-40px,20px)}.visual .pb{position:absolute;transform:rotate(6deg) translate(120px,-10px);width:250px}
.badge-ai{display:inline-flex;align-items:center;gap:6px;background:var(--gs);color:#7D520A;font-weight:800;font-size:12px;padding:4px 10px;border-radius:999px}
/* AI section */
.ai{background:linear-gradient(180deg,var(--bg),#E3EEE9);position:relative}
.ai-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:40px}
.ac{background:#fff;border-radius:24px;padding:24px;box-shadow:0 20px 40px -26px rgba(6,52,58,.5);position:relative;overflow:hidden}
.ac:before{content:"";position:absolute;inset:0 0 auto;height:4px;background:linear-gradient(90deg,var(--p),#7FE3D6,var(--gold))}
.ac .k{font-size:34px;font-weight:900;color:var(--p)}.ac b{display:block;margin:6px 0 4px}.ac span{font-size:14px;color:var(--t2)}
.flow{display:flex;align-items:center;gap:10px;margin-top:30px;flex-wrap:wrap}
.flow div{background:#fff;border-radius:16px;padding:12px 16px;font-weight:700;font-size:14px;box-shadow:0 10px 24px -16px rgba(6,52,58,.5)}.flow i{color:var(--gold);font-style:normal;font-weight:900}
/* wecom */
.wecom .tri{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:50px;align-items:end}
.wecom figure{background:#fff;border-radius:28px;padding:14px;box-shadow:0 30px 60px -30px rgba(6,52,58,.5);transition:.35s}
.wecom figure:nth-child(2){transform:translateY(-40px)}.wecom figure:hover{transform:translateY(-50px)}
.wecom figure .im{height:520px;border-radius:18px;overflow:hidden}.wecom figure img{width:100%;height:100%;object-fit:cover;object-position:top}
.wecom figcaption{padding:14px 8px 4px;font-weight:800}.wecom figcaption span{display:block;font-weight:500;font-size:14px;color:var(--t2)}
/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:50px;counter-reset:s}
.st{background:#fff;border-radius:24px;padding:26px 20px;position:relative;box-shadow:0 14px 30px -20px rgba(6,52,58,.45)}
.st:before{counter-increment:s;content:"0" counter(s);font-size:44px;font-weight:900;background:linear-gradient(180deg,var(--p),#7FE3D6);-webkit-background-clip:text;color:transparent;display:block;line-height:1}
.st b{display:block;margin:14px 0 6px;font-size:17px}.st span{font-size:14px;color:var(--t2)}
pre.code{margin-top:30px;background:#0B2426;color:#CFEDE8;border-radius:20px;padding:22px 26px;font-size:14px;overflow:auto;box-shadow:0 30px 60px -30px rgba(0,0,0,.6)}pre.code .t{color:#F7D88A}pre.code .s{color:#7FE3D6}
/* cases */
.cases{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.cs{border-radius:26px;padding:26px;min-height:230px;color:#fff;position:relative;overflow:hidden;transition:.3s}.cs:hover{transform:translateY(-6px)}
.cs .e{font-size:34px}.cs b{display:block;font-size:20px;margin:16px 0 6px}.cs span{font-size:14px;opacity:.85}
.cs:after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:-60px;bottom:-60px;background:rgba(255,255,255,.12)}
/* pricing */
.price{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:50px}
.pc{background:#fff;border-radius:30px;padding:34px;position:relative;box-shadow:0 24px 50px -30px rgba(6,52,58,.5)}
.pc.hot{background:var(--pd);color:#fff;transform:scale(1.04);box-shadow:0 40px 80px -30px rgba(6,52,58,.8)}
.pc .tag{position:absolute;top:18px;right:18px;background:var(--gs);color:#7D520A;font-weight:800;font-size:12px;padding:4px 10px;border-radius:999px}
.pc h3{font-size:20px}.pc .amt{font-size:44px;font-weight:900;margin:14px 0;letter-spacing:-.02em}.pc .amt small{font-size:15px;opacity:.6}
.pc ul{list-style:none;display:grid;gap:10px;margin:20px 0 28px;font-size:14.5px}.pc li:before{content:"✓";color:var(--gold);font-weight:900;margin-right:8px}
.pc .btn{width:100%;justify-content:center}.pc.hot .btn{background:#F7D88A;color:#3B2604}.pc:not(.hot) .btn{background:var(--ps);color:var(--pd)}
/* faq */
.faq{max-width:860px;margin:44px auto 0}
details{background:#fff;border-radius:20px;margin-bottom:12px;box-shadow:0 10px 24px -18px rgba(6,52,58,.45);overflow:hidden}
summary{list-style:none;cursor:pointer;padding:22px 26px;font-weight:800;font-size:17px;display:flex;justify-content:space-between;align-items:center}summary::-webkit-details-marker{display:none}
summary:after{content:"+";width:34px;height:34px;border-radius:50%;background:var(--ps);color:var(--p);display:grid;place-items:center;font-size:22px;transition:.3s;flex:none}
details[open]{background:#F4F9F7}details[open] summary:after{transform:rotate(45deg);background:var(--p);color:#fff}
details p{padding:0 26px 22px;color:var(--t2)}
/* final cta */
.final{background:var(--hero);border-radius:48px;color:#fff;padding:90px 60px;position:relative;overflow:hidden;text-align:center}
.final h2{color:#fff;max-width:760px;margin:0 auto 16px}.final .sub{color:rgba(255,255,255,.8);margin:0 auto}.final .cta{justify-content:center}
.final .fb{position:absolute;width:380px;right:-60px;bottom:-80px;opacity:.9;animation:float 7s ease-in-out infinite}.final .fb2{left:-90px;top:-60px;right:auto;bottom:auto;width:300px;transform:scaleX(-1);opacity:.35}
footer{padding:70px 0 40px;color:var(--t2);font-size:14px}
.fg{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:40px}.fg h4{color:var(--ink);margin-bottom:12px}.fg a{display:block;margin:2px 0;padding:6px 0;min-height:32px}.fg a:hover{color:var(--p)}
.copy{margin-top:50px;padding-top:24px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.matrix{display:inline-flex;align-items:center;gap:8px;background:#fff;border-radius:999px;padding:6px 14px 6px 8px;font-weight:700;color:var(--ink);box-shadow:0 8px 20px -14px rgba(6,52,58,.5);margin-top:16px}
.matrix i{font-style:normal;width:26px;height:26px;border-radius:50%;background:var(--pd);color:#fff;display:grid;place-items:center;font-size:14px}
.rv{opacity:0;transform:translateY(40px);transition:opacity .9s,transform .9s cubic-bezier(.2,.8,.2,1)}.rv.in{opacity:1;transform:none}
@media(max-width:900px){
.nav nav,.nav .brand small{display:none}.nav .btn{margin-left:auto;height:40px;padding:0 16px;font-size:14px}
.hero{padding:120px 0 170px}.hero .wrap,.split,.inbox{grid-template-columns:1fr}.split.rev>:first-child{order:0}
.stage{height:440px}.stage .bird{width:400px;right:-110px;top:-40px}.stage .p1{width:190px;left:0;top:90px}.stage .p2{width:190px;left:150px;top:30px}.c1{left:0;top:0}.c3{display:none}
.cards3,.wecom .tri,.price,.ai-grid{grid-template-columns:1fr}.steps,.cases{grid-template-columns:1fr 1fr}.fg{grid-template-columns:1fr 1fr}
.inbox{padding:40px 24px;border-radius:32px}.wecom figure:nth-child(2){transform:none}.wecom figure .im{height:440px}.pc.hot{transform:none}
section{padding:80px 0}.visual{min-height:480px}.visual .phone{width:220px}.visual .pb{width:200px;transform:rotate(6deg) translate(90px,-10px)}.final{padding:60px 24px;border-radius:32px}}
.mqw{overflow:hidden;padding:40px 0;margin-top:-130px;position:relative;z-index:5}
section{overflow:hidden}html,body{overflow-x:hidden}@media(max-width:900px){.stage .bird{width:340px;right:-90px;top:-60px;opacity:.9}}

/* ===== 青鸾传信 · 名字由来 ===== */
.sf-link{display:inline-flex;margin-top:10px;font-weight:750;color:var(--p,#0B6E6E)}
.ft-origin{margin-top:8px;font-size:13px;opacity:.8;max-width:320px}
.origin{padding-top:40px}
.og{position:relative;overflow:hidden;border-radius:44px;padding:64px 56px 48px;color:#fff;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px 56px;
 background:radial-gradient(90% 70% at 85% 10%,rgba(247,216,138,.28),transparent 60%),radial-gradient(70% 70% at 0% 100%,rgba(127,227,214,.35),transparent 60%),linear-gradient(160deg,#06343A,#0A585C 55%,#0B6466);box-shadow:0 50px 90px -40px rgba(6,52,58,.75)}
.og-sky{position:absolute;inset:0;pointer-events:none}
.og-ring{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.14)}.og-ring.r1{width:560px;height:560px;right:-120px;top:-180px;box-shadow:0 0 0 70px rgba(255,255,255,.025),0 0 0 150px rgba(255,255,255,.02)}.og-ring.r2{width:300px;height:300px;left:-90px;bottom:-140px}
.og-cloud{position:absolute;width:180px;opacity:.35;filter:brightness(3)}.og-cloud.c1{left:44%;top:30px;animation:ogf 14s ease-in-out infinite}.og-cloud.c2{right:6%;bottom:40px;width:140px;animation:ogf 18s ease-in-out infinite reverse}
@keyframes ogf{50%{transform:translateX(24px)}}
.og-copy{position:relative;z-index:1}
.og h2 em{font-style:normal;background:linear-gradient(90deg,#F7D88A,#7FE3D6);-webkit-background-clip:text;background-clip:text;color:transparent}
.og-lead{font-size:16.5px;line-height:1.9;opacity:.9;max-width:560px}
.og-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
.og-facts div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:14px;backdrop-filter:blur(8px)}
.og-facts b{display:block;font-family:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC",serif;font-size:17px;color:#F7D88A}.og-facts span{font-size:12.5px;opacity:.85}
.og-poem{position:relative;z-index:1;margin:0;display:grid;place-items:center}
.og-card{position:relative;width:min(420px,100%);aspect-ratio:3/4;border-radius:28px;background:linear-gradient(170deg,#F6F0E2,#EADFC6);color:#2A1E0C;box-shadow:0 40px 70px -30px rgba(0,0,0,.6),inset 0 0 0 10px rgba(255,255,255,.35),inset 0 0 0 11px rgba(160,120,50,.25);overflow:hidden;transform:rotate(-2deg);transition:transform .5s}
.og-card:hover{transform:rotate(0)}
.og-card blockquote{position:absolute;right:16%;top:10%;margin:0;writing-mode:vertical-rl;font-family:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC",serif;font-size:clamp(24px,2.6vw,34px);letter-spacing:.32em;line-height:1;font-weight:700}
.og-card blockquote span{display:block;white-space:nowrap}.og-card blockquote span:nth-child(2){margin-right:.7em;padding-top:1.6em;color:#0B5F63}
.og-card figcaption{position:absolute;left:36px;top:96px;writing-mode:vertical-rl;font-size:13px;letter-spacing:.3em;color:#7D520A;font-family:"Songti SC","STSong","Noto Serif CJK SC",serif}
.og-seal{position:absolute;left:26px;top:26px;width:48px;height:48px;border-radius:8px;background:#B93A22;color:#FBEDE2;display:grid;place-items:center;font-size:15px;line-height:1.05;font-weight:800;text-align:center;font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;transform:rotate(-6deg);box-shadow:inset 0 0 0 2px rgba(255,255,255,.3)}
.og-bird{position:absolute;left:-14%;bottom:-8%;width:78%;opacity:.95;filter:drop-shadow(0 18px 24px rgba(6,52,58,.35));animation:ogb 7s ease-in-out infinite}
@keyframes ogb{50%{transform:translateY(-10px) rotate(-2deg)}}
.og-tie{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;position:relative;z-index:1}
.og-tie-i{display:flex;gap:14px;align-items:flex-start;background:#fff;color:var(--ink,#0F1F1F);border-radius:22px;padding:18px;box-shadow:0 20px 40px -24px rgba(0,0,0,.5)}
.og-tie-i i{flex:none;width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-style:normal;font-size:20px;background:linear-gradient(160deg,#DCF0EB,#BFE6DE);color:#0B6E6E}
.og-tie-i b{display:block;font-size:15.5px}.og-tie-i span{font-size:13px;color:#3B4F51}
@media(max-width:1100px){.og{grid-template-columns:1fr;padding:48px 36px 36px}.og-poem{order:-1}.og-card{width:min(380px,100%)}.og-tie{grid-template-columns:1fr 1fr 1fr}}
@media(max-width:760px){.og-card blockquote{font-size:22px}.og{padding:36px 20px 22px;border-radius:30px}.og-facts{grid-template-columns:1fr}.og-tie{grid-template-columns:1fr}.og-card{width:min(320px,100%)}.og-lead{font-size:15px}.og-cloud{display:none}}
@media(prefers-reduced-motion:reduce){.og-bird,.og-cloud{animation:none}}

/* 顶部：免费注册 / 登录 */
.nav .nav-cta{display:flex;align-items:center;gap:10px;flex:none}
.nav .nav-cta .btn{min-height:44px;padding:0 18px;font-size:14px}
.nav .nav-cta .btn-o{background:transparent;border:1px solid rgba(11,110,110,.35);color:var(--p,#0B6E6E)}
.nav .nav-cta .btn-o:hover{border-color:var(--p,#0B6E6E);background:var(--ps,#DCF0EB)}
@media (max-width:980px){
  .nav .nav-cta{gap:8px}
  .nav .nav-cta .btn{min-height:40px;padding:0 14px;font-size:13px}
}
@media (max-width:720px){
  .nav{flex-wrap:wrap;row-gap:10px}
  .nav nav{order:3;width:100%;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .nav nav::-webkit-scrollbar{display:none}
  .nav .nav-cta{margin-left:auto}
}