:root{
  --blue:#005FDF;--blue-dark:#004CB3;--gold:#ECC51D;--gold-dark:#C9A40E;
  --ink:#14213B;--ink-2:#5C6678;--blue-bg:#E6EFFC;--gold-bg:#FFF6D6;
  --white:#FFFFFF;--line:#E3E8F0;--green:#27A86B;--orange:#F08A24;
  --maxw:1040px;--radius:18px;
  --head:"Zen Maru Gothic","Noto Sans TC",system-ui,-apple-system,"PingFang TC","Microsoft JhengHei",sans-serif;
  --body:"Noto Sans TC","Zen Maru Gothic",system-ui,-apple-system,"PingFang TC","Microsoft JhengHei",sans-serif;
  --shadow:0 8px 30px rgba(20,33,59,.08);
  --shadow-lg:0 20px 50px rgba(0,95,223,.16);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--body);color:var(--ink);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,.brand,.btn{font-family:var(--head)}
em{font-style:normal;color:var(--blue)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
section{padding:72px 0}
.eyebrow{display:inline-block;font-size:.85rem;font-weight:700;letter-spacing:.08em;color:var(--blue);background:var(--blue-bg);padding:6px 14px;border-radius:999px;margin-bottom:14px}
h2{font-size:clamp(1.6rem,4vw,2.3rem);font-weight:900;line-height:1.3;margin-bottom:12px}
.lead{color:var(--ink-2);font-size:1.05rem;max-width:620px}
.center{text-align:center}
.center .lead{margin:0 auto}

/* language toggling */
[data-lang="zh"] .only-en{display:none!important}
[data-lang="en"] .only-zh{display:none!important}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;border-radius:999px;font-weight:700;font-size:1rem;border:2px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;white-space:nowrap}
.btn:hover{transform:translateY(-3px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(0,95,223,.28)}
.btn-primary:hover{background:var(--blue-dark);box-shadow:0 14px 28px rgba(0,95,223,.32)}
.btn-gold{background:var(--gold);color:var(--ink);box-shadow:0 8px 20px rgba(236,197,29,.35)}
.btn-gold:hover{background:#F5D23A}
.btn-outline{background:#fff;color:var(--blue);border-color:var(--blue)}
.btn-outline:hover{background:var(--blue-bg)}
.btn-sm{padding:9px 18px;font-size:.92rem}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.25rem;letter-spacing:.01em}
.brand img{width:38px;height:38px;border-radius:10px;object-fit:contain}
.nav-right{display:flex;align-items:center;gap:10px}
.lang{display:inline-flex;border:1.5px solid var(--line);border-radius:999px;padding:3px;background:#fff}
.lang button{border:0;background:transparent;font:inherit;font-weight:700;font-size:.85rem;color:var(--ink-2);padding:5px 12px;border-radius:999px;cursor:pointer;transition:background .2s,color .2s}
.lang button.on{background:var(--blue);color:#fff}
@media (max-width:480px){.nav .btn-sm{padding:8px 13px;font-size:.85rem}.brand{font-size:1.1rem}}

/* hero */
.hero{background-image:linear-gradient(90deg,rgba(255,255,255,.98) 0%,rgba(255,255,255,.9) 42%,rgba(255,255,255,.35) 72%,rgba(255,255,255,.08) 100%),url('img/hero-bg.webp');background-size:cover;background-position:center;padding:56px 0 64px;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-logo{width:96px;height:96px;object-fit:contain;border-radius:26px;box-shadow:var(--shadow);margin-bottom:22px;animation:pop .7s cubic-bezier(.34,1.56,.64,1) both}
@keyframes pop{0%{transform:scale(.5) rotate(-12deg);opacity:0}100%{transform:scale(1) rotate(0);opacity:1}}
h1{font-size:clamp(2.1rem,6vw,3.4rem);font-weight:900;line-height:1.2;margin-bottom:16px}
h1 .tag{display:block;font-size:.5em;font-weight:700;color:var(--ink-2);margin-top:8px;letter-spacing:.02em}
.hero .lead{font-size:1.15rem;margin-bottom:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.hero-note{font-size:.9rem;color:var(--ink-2);display:flex;flex-wrap:wrap;gap:6px 18px}
.hero-note span::before{content:"✓";color:var(--green);font-weight:700;margin-right:5px}

/* phone mock */
.phone-wrap{display:flex;justify-content:center;position:relative}
.phone-wrap::before{content:"";position:absolute;inset:10% -6% -4% -6%;background:linear-gradient(135deg,var(--blue-bg),var(--gold-bg));border-radius:40px;z-index:0;transform:rotate(-4deg)}
.phone{position:relative;z-index:1;width:290px;background:#111827;border-radius:38px;padding:12px;box-shadow:var(--shadow-lg)}
.phone-screen{background:#F5F8FD;border-radius:28px;overflow:hidden;font-size:.8rem;min-height:520px;position:relative}
.notch{width:110px;height:24px;background:#111827;border-radius:0 0 16px 16px;margin:0 auto}
.app-bar{display:flex;align-items:center;gap:8px;padding:8px 16px 10px;font-family:var(--head);font-weight:900;font-size:.95rem}
.app-bar img{width:22px;height:22px;object-fit:contain;border-radius:6px}
.app-bar .pill{margin-left:auto;font-size:.65rem;background:var(--blue-bg);color:var(--blue);padding:2px 8px;border-radius:999px;font-weight:700}
.ev-card{margin:0 12px 10px;background:#fff;border-radius:16px;padding:14px;box-shadow:0 4px 14px rgba(20,33,59,.06)}
.ev-card .ttl{font-family:var(--head);font-weight:900;font-size:1.05rem;margin-bottom:6px}
.ev-meta{display:grid;gap:4px;color:var(--ink-2);font-size:.75rem;margin-bottom:10px}
.ev-meta span::before{margin-right:6px}
.ev-meta .t::before{content:"🗓"}.ev-meta .p::before{content:"📍"}.ev-meta .n::before{content:"👥"}
.bar{height:8px;background:var(--blue-bg);border-radius:999px;overflow:hidden;margin:6px 0 10px}
.bar i{display:block;height:100%;width:70%;background:linear-gradient(90deg,var(--blue),#4C8DF5);border-radius:999px}
.rsvp{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.rsvp span{text-align:center;padding:7px 4px;border-radius:10px;font-weight:700;font-size:.72rem;border:1.5px solid var(--line);color:var(--ink-2)}
.rsvp .in{background:var(--blue);border-color:var(--blue);color:#fff}
.ev-list{margin:0 12px 10px;background:#fff;border-radius:16px;padding:12px 14px;box-shadow:0 4px 14px rgba(20,33,59,.06)}
.ev-list .h{font-weight:700;font-size:.78rem;margin-bottom:8px;display:flex;justify-content:space-between}
.ev-list .h b{color:var(--blue)}
.ppl{display:flex;flex-direction:column;gap:6px}
.ppl div{display:flex;align-items:center;gap:8px;font-size:.75rem}
.av{width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.65rem;color:#fff;flex-shrink:0}
.ppl .st{margin-left:auto;font-size:.65rem;padding:1px 7px;border-radius:999px;font-weight:700}
.st.y{background:#E4F6EC;color:var(--green)}.st.m{background:var(--gold-bg);color:var(--gold-dark)}
.ev-actions{margin:0 12px 14px;display:flex;gap:8px}
.ev-actions span{flex:1;text-align:center;font-size:.72rem;font-weight:700;padding:8px;border-radius:12px}
.ev-actions .a1{background:#06C755;color:#fff}.ev-actions .a2{background:#fff;border:1.5px solid var(--line);color:var(--ink)}
.home-bar{position:absolute;left:50%;bottom:8px;transform:translateX(-50%);width:100px;height:5px;border-radius:999px;background:#111827;opacity:.25}

/* steps */
.steps{background:var(--blue-bg)}
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.step{background:#fff;border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);position:relative}
.step-visual{display:flex;align-items:center;gap:2px;min-height:112px;margin:-10px 0 10px -8px}
.step-art{width:112px;height:112px;flex:0 0 112px;object-fit:contain;filter:drop-shadow(0 9px 12px rgba(20,33,59,.08))}
.step-number{display:inline-block;font-family:var(--head);font-size:3.45rem;font-weight:900;line-height:1;color:var(--gold);-webkit-text-stroke:1px var(--gold-dark);paint-order:stroke fill;text-shadow:3px 3px 0 rgba(0,95,223,.17);transform:rotate(3deg);transform-origin:center}
.step:nth-child(2) .step-number{transform:rotate(-3deg)}
.step:nth-child(3) .step-number{transform:rotate(2deg)}
.step h3{font-size:1.2rem;font-weight:900;margin-bottom:8px}
.step p{color:var(--ink-2);font-size:.97rem}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.chips span{font-size:.78rem;background:var(--blue-bg);color:var(--blue);padding:3px 10px;border-radius:999px;font-weight:700}
.chips .g{background:var(--gold-bg);color:var(--gold-dark)}
.chips .gr{background:#E4F6EC;color:var(--green)}
.chips .o{background:#FFEBD6;color:var(--orange)}

/* features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.feat{border:1.5px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .2s,box-shadow .2s,border-color .2s;background:#fff}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#C6D8F5}
.spot{display:block;object-fit:contain;filter:drop-shadow(0 9px 12px rgba(20,33,59,.08))}
.feat .spot{width:116px;height:116px;margin:-10px 0 10px -6px;transition:transform .25s ease}
.feat:hover .spot{transform:translateY(-3px) rotate(-1deg)}
.feat h3{font-size:1.1rem;font-weight:900;margin-bottom:6px}
.feat p{color:var(--ink-2);font-size:.95rem}

/* tree */
/* 痛點 */
.pain{background:#fff}
.pain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:36px}
.pain-card{background:var(--blue-bg);border-radius:var(--radius);padding:24px;display:grid;grid-template-columns:104px 1fr;gap:18px;align-items:center;overflow:hidden}
.pain-card .spot{width:104px;height:104px;transform:scale(1.12)}
.pain-card h3{font-size:1.15rem;font-weight:900;margin-bottom:6px}
.pain-card p{color:var(--ink-2);font-size:.96rem;margin-bottom:10px}
.pain-card .fix{display:flex;gap:8px;align-items:flex-start;font-size:.92rem;font-weight:700;color:var(--ink)}
.pain-card .fix i{flex:none;width:22px;height:22px;border-radius:7px;background:var(--gold);color:var(--ink);font-style:normal;font-size:.8rem;display:flex;align-items:center;justify-content:center}
/* 活動類型 */
.types{background:var(--gold-bg)}
.type-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:36px}
.type{position:relative;border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow);aspect-ratio:4/3;display:flex;flex-direction:column;justify-content:flex-end;isolation:isolate;transition:transform .25s ease,box-shadow .25s ease}
.type:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(20,33,59,.14)}
.type img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.type .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue-bg),#fff)}
.type .ph svg{width:56px;height:56px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;opacity:.9}
.type .cap{position:relative;padding:28px 14px 12px;background:linear-gradient(180deg,transparent,rgba(255,255,255,.93) 38%,#fff 100%)}
.type .cap b{display:block;font-family:var(--head);font-size:1.05rem;font-weight:900}
.type .cap span{font-size:.82rem;color:var(--ink-2)}
/* 揪圈：照片保留溫度，透明節點與連線說明朋友如何湊在一起 */
.tree{background:linear-gradient(180deg,#fff 0,var(--gold-bg) 100%)}
.circle-art{position:relative;width:100%;max-width:470px;aspect-ratio:1;margin:0 auto;isolation:isolate}
.circle-art picture,.circle-art img{position:absolute;inset:0;width:100%;height:100%}
.circle-art img{object-fit:contain;opacity:.72;filter:saturate(.88)}
.circle-art .network{position:absolute;inset:5%;width:90%;height:90%;z-index:1;overflow:visible;filter:drop-shadow(0 5px 10px rgba(0,95,223,.12))}
.circle-art .network path{fill:none;stroke:rgba(0,95,223,.38);stroke-width:1.35;stroke-linecap:round;stroke-dasharray:4 5}
.circle-art .network path.friend{stroke:rgba(39,168,107,.38)}
.circle-art .p{position:absolute;z-index:2;width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--head);font-weight:900;font-size:.82rem;box-shadow:0 8px 18px rgba(20,33,59,.13);border:2px solid rgba(255,255,255,.9);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}
.circle-art .p.me{width:76px;height:76px;background:rgba(0,95,223,.78);font-size:1.05rem;left:50%;top:50%;transform:translate(-50%,-50%);border-color:rgba(236,197,29,.95)}
.circle-art .p.f{background:rgba(39,168,107,.72)}.circle-art .p.ff{background:rgba(240,138,36,.7);width:44px;height:44px;font-size:.75rem}
.circle-art .tag{position:absolute;z-index:3;font-size:.66rem;font-weight:700;padding:2px 7px;border-radius:999px;background:rgba(255,255,255,.76);border:1px solid rgba(255,255,255,.92);backdrop-filter:blur(5px);box-shadow:0 5px 14px rgba(20,33,59,.08);color:var(--ink-2);white-space:nowrap}
@media (max-width:860px){.pain-grid{grid-template-columns:1fr}.type-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.type-grid{grid-template-columns:repeat(2,1fr);gap:10px}.pain-card{grid-template-columns:78px 1fr;gap:12px;padding:20px 16px}.pain-card .spot{width:78px;height:78px}.feat .spot{width:104px;height:104px}.circle-art .p{width:44px;height:44px;font-size:.72rem}.circle-art .p.ff{width:38px;height:38px;font-size:.68rem}.circle-art .p.me{width:66px;height:66px}.circle-art .tag{font-size:.58rem}.hero{background-image:linear-gradient(rgba(255,255,255,.82),rgba(255,255,255,.92)),url('img/hero-bg-sm.webp');background-position:center top}}
.tree .wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.tree-svg{width:100%;height:auto;max-width:460px;margin:0 auto;display:block;filter:drop-shadow(0 10px 20px rgba(20,33,59,.08))}
.legend{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:18px;font-size:.92rem;color:var(--ink-2)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:12px;height:12px;border-radius:50%;display:inline-block}
.tree ul{list-style:none;margin-top:16px;display:grid;gap:10px}
.tree li{padding-left:28px;position:relative;color:var(--ink-2)}
.tree li::before{content:"";position:absolute;left:0;top:10px;width:16px;height:16px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px var(--gold-bg)}

/* safe */
.safe .box{background:var(--blue-bg);border-radius:24px;padding:40px;display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:start}
.safe .shield{width:72px;height:72px;border-radius:22px;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow)}
.safe .shield svg{width:38px;height:38px}
.safe h2{font-size:1.6rem}
.safe p{color:var(--ink-2);margin-bottom:10px}
.safe p:last-child{margin-bottom:0;font-size:.9rem}

/* a2hs */
.a2hs .two{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.os{background:#fff;border:1.5px solid var(--line);border-radius:var(--radius);padding:26px 24px}
.os h3{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:900;margin-bottom:14px}
.os h3 .b{width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:900;color:#fff}
.os ol{padding-left:22px;color:var(--ink-2);display:grid;gap:6px}
.os ol li::marker{color:var(--blue);font-weight:700}
.os kbd{font-family:inherit;background:var(--blue-bg);color:var(--blue);padding:1px 8px;border-radius:6px;font-size:.88em;font-weight:700}

/* bottom cta */
/* 追蹤打氣 */
.follow{background:#fff}
.follow .wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
.follow .fcard{border-radius:var(--radius);padding:34px 30px;display:flex;flex-direction:column;gap:0}
.follow .fcard.ig{background:linear-gradient(160deg,#FFF3F8,#FFF8EC)}
.follow .fcard.fb{background:var(--blue-bg)}
.follow .fcard h2{font-size:1.5rem;margin-bottom:14px}
.follow .fcard .soc{align-self:flex-start;margin-top:auto}
.follow .who{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.follow .who img{width:56px;height:56px;border-radius:50%;object-fit:cover;border:3px solid var(--gold)}
.follow .who b{display:block;font-family:var(--head);font-size:1.05rem}
.follow .who span{font-size:.9rem;color:var(--ink-2)}
.follow .lead{margin-bottom:22px}
.follow .socials{display:flex;flex-wrap:wrap;gap:10px}
.follow .soc{display:inline-flex;align-items:center;gap:8px;padding:12px 18px;border-radius:999px;font-weight:700;text-decoration:none;color:#fff;box-shadow:var(--shadow);transition:transform .15s}
.follow .soc:hover{transform:translateY(-2px)}
.follow .soc svg{width:20px;height:20px;fill:currentColor}
.follow .soc.ig{background:linear-gradient(45deg,#F58529,#DD2A7B 55%,#8134AF)}
.follow .soc.th{background:#14213B}.follow .soc.yt{background:#FF0000}.follow .soc.fb{background:#1877F2}
.follow .fbbox{background:#fff;border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:12px;align-items:center;margin-top:auto}
.follow .soc.fbl{background:#fff;color:var(--blue);border:2px solid var(--blue);box-shadow:none}
.follow .fbbox iframe{border:0;overflow:hidden;width:100%;max-width:340px;height:130px;border-radius:12px;background:#fff}
.follow .fbbox .row{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.follow .fbbox .nt{font-size:.82rem;color:var(--ink-2);text-align:center}
@media (max-width:860px){.follow .wrap{grid-template-columns:1fr}}
.cta{background:var(--blue);color:#fff;text-align:center;padding:80px 0;position:relative;overflow:hidden}
.cta::before,.cta::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.08)}
.cta::before{width:320px;height:320px;left:-100px;top:-120px}
.cta::after{width:260px;height:260px;right:-80px;bottom:-120px;background:rgba(236,197,29,.22)}
.cta .wrap{position:relative}
.cta h2{color:#fff}
.cta h2 em{color:var(--gold)}
.cta p{color:rgba(255,255,255,.85);max-width:560px;margin:0 auto 28px;font-size:1.05rem}
.cta .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.cta .btn-outline:hover{background:rgba(255,255,255,.12)}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* footer */
footer{padding:36px 0;font-size:.88rem;color:var(--ink-2);border-top:1px solid var(--line)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px}
footer .brand{font-size:1rem}
footer .brand img{width:26px;height:26px;border-radius:7px}
footer a:hover{color:var(--blue)}

/* responsive */
@media (max-width:860px){
  section{padding:56px 0}
  .hero{padding:40px 0 56px}
  .hero .wrap{grid-template-columns:1fr;gap:40px}
  .hero .txt{text-align:center}
  .hero-logo{margin-left:auto;margin-right:auto}
  .hero .lead{margin-left:auto;margin-right:auto}
  .hero-cta,.hero-note{justify-content:center}
  .step-grid,.feat-grid{grid-template-columns:1fr}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .tree .wrap{grid-template-columns:1fr}
  .safe .box{grid-template-columns:1fr;padding:28px 22px}
  .a2hs .two{grid-template-columns:1fr}
}
@media (max-width:560px){
  .feat-grid{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
  .phone{width:270px}
  footer .wrap{flex-direction:column;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .btn:hover,.feat:hover{transform:none}
}