:root{--paper:#f5f5f5;--white:#fff;--mint:#ecfdf5;--green:#00bb7e;--green-deep:#007956;--forest:#022c22;--lime:#a3e635;--bright:#34d399;--ink:#163c32;--muted:#52645f;--line:#e4e4e7;--shadow:0 22px 60px rgba(2,44,34,.09);--radius:28px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans","Noto Sans SC","Noto Sans JP","Microsoft YaHei","Yu Gothic UI",sans-serif;--mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;--h2:clamp(2.2rem,5vw,4.4rem);--h3:clamp(1.18rem,2vw,1.45rem)}html[lang="ja"]{--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Noto Sans JP",Meiryo,sans-serif}*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth;scroll-padding-top:116px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--forest);outline-offset:2px}body{margin:0;background:var(--paper);color:var(--forest);font-family:var(--font);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.announcement{min-height:38px;background:var(--mint);display:flex;align-items:center;justify-content:center;padding:7px 20px;text-align:center;font-size:14px;color:var(--green-deep)}.announcement strong{color:var(--forest)}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(228,228,231,.8)}.header-inner{max-width:1240px;height:72px;margin:auto;padding:0 24px;display:grid;grid-template-columns:190px 1fr auto;align-items:center;gap:18px}.brand{display:inline-flex;align-items:center;width:max-content}.brand img{height:38px;width:auto}.primary-nav{display:flex;justify-content:center;gap:6px}.primary-nav a,.header-actions a,.lang-switch summary{white-space:nowrap;font-size:14px;font-weight:650}.primary-nav a{padding:9px 13px;border-radius:12px;color:#38594f}.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--mint);color:var(--green-deep)}.header-actions{display:flex;align-items:center;gap:8px}.header-login,.lang-switch summary{min-height:40px;padding:8px 13px;border:1px solid var(--line);border-radius:13px;background:var(--white);display:flex;align-items:center;justify-content:center}.header-login:hover{background:var(--forest);color:var(--white);border-color:var(--forest)}.lang-switch{position:relative}.lang-switch summary{list-style:none;cursor:pointer;gap:8px}.lang-switch summary::-webkit-details-marker{display:none}.lang-switch summary::after{content:"";width:7px;height:7px;border-right:1.5px solid;border-bottom:1.5px solid;transform:rotate(45deg) translateY(-2px)}.lang-menu{position:absolute;right:0;top:calc(100% + 10px);min-width:172px;padding:8px;background:var(--white);border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);display:grid;z-index:35}.lang-menu a{padding:8px 10px;border-radius:9px;font-size:14px}.lang-menu a:hover,.lang-menu a[aria-current="page"]{background:var(--mint);color:var(--green-deep)}.lang-menu a[aria-current="page"]::after{content:"";display:inline-block;width:7px;height:4px;margin-left:9px;border-left:2px solid var(--green-deep);border-bottom:2px solid var(--green-deep);transform:rotate(-45deg) translateY(-2px)}.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;place-items:center;padding:0}.nav-toggle span,.nav-toggle::before,.nav-toggle::after{content:"";display:block;width:18px;height:2px;background:var(--forest);margin:3px}.mobile-nav{position:fixed;inset:111px 16px auto;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);z-index:45}.mobile-nav[hidden]{display:none}.mobile-nav a{display:block;padding:12px;border-radius:10px;font-weight:650}.mobile-nav a:hover{background:var(--mint)}.hero{position:relative;overflow:hidden;padding:96px 24px 72px;text-align:center;background:radial-gradient(circle at 50% 32%,rgba(52,211,153,.18),transparent 33%)}.hero::before{content:"";position:absolute;width:560px;height:560px;border:1px solid rgba(0,187,126,.1);border-radius:50%;left:50%;top:10%;transform:translateX(-50%);pointer-events:none}.hero-inner{position:relative;max-width:1120px;margin:auto}.hero h1{margin:0;background:linear-gradient(180deg,#00bb7e 10%,#007956 65%,#a3e635 145%);-webkit-background-clip:text;background-clip:text;color:transparent;font-size:clamp(4.2rem,9vw,8rem);font-weight:800;letter-spacing:-.032em;line-height:1}.hero-lead{max-width:780px;margin:30px auto 0;font-size:clamp(1.08rem,2vw,1.3rem);color:var(--muted)}.hero-actions{margin-top:34px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:12px 20px;border-radius:15px;border:1px solid transparent;font-weight:750}.button-primary{background:var(--green);color:var(--forest);box-shadow:0 10px 25px rgba(0,187,126,.22)}.button-primary:hover{background:var(--bright);color:var(--forest)}.button-secondary{background:var(--white);border-color:var(--line);color:var(--forest)}.button-secondary:hover{background:var(--mint);color:var(--green-deep)}.arrow-up{width:8px;height:8px;border-top:2px solid currentColor;border-right:2px solid currentColor}.hero-proof{margin:28px auto 0;display:flex;justify-content:center;gap:18px;flex-wrap:wrap;color:#486259;font-size:14px}.hero-proof span{display:flex;align-items:center;gap:8px}.hero-proof i{width:7px;height:7px;border-radius:50%;background:var(--bright)}.mail-section{padding:0 24px 96px}.mail-shell{max-width:1240px;margin:auto;border-radius:32px;background:var(--white);box-shadow:var(--shadow);border:1px solid rgba(228,228,231,.75);overflow:hidden}.mail-toolbar{padding:22px 24px;background:var(--mint);display:flex;align-items:center;gap:16px}.address-block{flex:1;min-width:0}.address-label{display:block;color:var(--green-deep);font-size:13px;font-weight:750;text-transform:uppercase;letter-spacing:.08em}.mail-address{font-family:var(--mono);font-size:clamp(1.05rem,2vw,1.35rem);font-weight:700;overflow-wrap:anywhere}.mail-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.tool-button{min-height:42px;border:1px solid #ccefe0;border-radius:12px;background:#fff;color:var(--forest);padding:8px 13px;font-weight:700}.tool-button:hover{background:var(--forest);border-color:var(--forest);color:#fff}.tool-button.primary{background:var(--green);border-color:var(--green);color:var(--forest)}.tool-button.primary:hover{background:var(--bright);color:var(--forest)}.mail-status{padding:12px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:14px}.live-status{display:flex;align-items:center;gap:9px}.live-status::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(0,187,126,.12)}#mail-timer{font-family:var(--mono);font-weight:750;color:var(--green-deep)}.inbox-grid{display:grid;grid-template-columns:minmax(290px,36%) minmax(0,1fr);height:980px}.mail-list-pane{min-width:0;border-right:1px solid var(--line);overflow:auto;background:#fbfdfc}.pane-title{position:sticky;top:0;z-index:2;margin:0;padding:18px 20px;background:rgba(251,253,252,.95);font-size:15px;border-bottom:1px solid var(--line)}.mail-list{display:grid}.mail-row{width:100%;min-width:0;padding:17px 18px;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:12px;align-items:start;color:var(--forest)}.mail-row:hover,.mail-row.active{background:var(--mint)}.mail-row.active{box-shadow:inset 3px 0 var(--green)}.sender-dot{width:40px;height:40px;padding:0 10px;border-radius:13px;background:var(--forest);color:var(--bright);display:grid;place-items:center;font-weight:800}.mail-row-copy{min-width:0;display:grid;gap:2px}.mail-row-copy strong,.mail-subject,.mail-row-copy small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mail-subject{font-weight:650}.mail-row-copy small{font-size:13px;color:var(--muted)}.mail-row time{font-size:12px;color:var(--muted);white-space:nowrap}.reader{min-width:0;max-height:980px;align-self:start;overflow:auto;background:#fff}.reader-inner{padding:36px 38px}.demo-badge,.eyebrow{display:flex;width:max-content;min-width:0;max-width:calc(100vw - 48px);align-items:center;padding:5px 10px;border-radius:999px;background:var(--mint);color:var(--green-deep);font-size:13px;font-weight:800}.demo-badge+h3,.eyebrow+h2{margin-top:14px}.reader h3{font-size:clamp(1.35rem,3vw,2rem);line-height:1.2;margin-bottom:12px}.mail-meta{display:flex;justify-content:space-between;gap:20px;padding-bottom:24px;border-bottom:1px solid var(--line);color:var(--muted)}.reader p{font-size:17px;max-width:720px;margin-top:30px}.mail-safe-note{margin-top:32px;padding:14px 16px;border-radius:14px;background:var(--paper);color:#4a5e57;font-size:14px}.demo-mail{margin-top:26px;border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden}.demo-mail p{max-width:none;margin:12px 20px 0;font-size:15px;line-height:1.6}.demo-mail-brand{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:14px 20px;background:var(--paper);border-bottom:1px solid var(--line)}.demo-brand-mark{display:grid;place-items:center;flex:none;width:38px;height:38px;border-radius:11px}.demo-brand-mark svg{display:block}.demo-mark-github{background:#171515;color:#fff}.demo-mark-uber{background:#000;color:#fff}.demo-brand-name{font-weight:800}.demo-brand-addr{color:var(--muted);font-size:13px;overflow-wrap:anywhere}.demo-mail .demo-mail-heading{margin-top:20px;font-size:1.12rem;font-weight:750;color:var(--forest)}.demo-mail .demo-mail-intro,.demo-mail .demo-mail-action{color:#3c544c}.demo-mail .demo-code{margin:18px 20px 0;padding:14px 18px;border:1px dashed #a7d8c7;border-radius:12px;background:var(--mint);color:var(--forest);font:800 1.6rem/1.2 var(--mono);letter-spacing:.14em;text-align:center;overflow-wrap:anywhere}.demo-mail .demo-code-cap{margin-top:8px;font-size:12.5px;color:var(--muted);text-align:center}.demo-mail .demo-facts{width:calc(100% - 40px);margin:18px 20px 0;border-collapse:collapse;font-size:14px}.demo-mail .demo-facts th{width:36%;padding:8px 10px 8px 0;background:transparent;color:var(--muted);font-size:13px;font-weight:650;letter-spacing:0;text-transform:none;text-align:left;vertical-align:top}.demo-mail .demo-facts td{padding:8px 0;font-weight:650;color:var(--forest);overflow-wrap:anywhere}.demo-mail .demo-facts tr+tr th,.demo-mail .demo-facts tr+tr td{border-top:1px solid var(--line)}.demo-mail .demo-mail-foot{margin-top:20px;padding:13px 20px;background:var(--paper);border-top:1px solid var(--line);color:var(--muted);font-size:12.5px;line-height:1.55}.section{padding:96px 24px}.section-mint{background:var(--mint)}.section-dark{background:var(--forest);color:#fff}.section-inner{max-width:1160px;margin:auto}.section-head{max-width:800px;margin-bottom:44px}.section h2{font-size:var(--h2);line-height:1.06;letter-spacing:-.03em;margin:0}.section-head p{font-size:18px;color:var(--muted);margin:22px 0 0}.section .eyebrow+h2,.section .eyebrow+h3,.section .eyebrow+h1,.section .eyebrow+p{margin-top:14px}.section-dark .section-head p{color:#c6ddd5}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{min-width:0;padding:28px;border-radius:24px;background:#fff;box-shadow:0 12px 30px rgba(2,44,34,.06)}.card h3{font-size:var(--h3);line-height:1.25;margin:16px 0 10px}.card p{margin:0;color:var(--muted)}.number{font-family:var(--mono);color:var(--green-deep);font-weight:800}.scenario-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.scenario{min-width:0;padding:30px;border-radius:24px;background:rgba(255,255,255,.07);border:1px solid rgba(236,253,245,.13)}.scenario h3{font-size:var(--h3);margin:0 0 10px;color:#fff}.scenario p{color:#c9ded7;margin:0}.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:54px;align-items:center}.code-window{border-radius:26px;background:var(--forest);box-shadow:var(--shadow);overflow:hidden;color:#d6fbed}.code-top{height:46px;padding:0 18px;display:flex;align-items:center;gap:8px;border-bottom:1px solid rgba(255,255,255,.12)}.code-top i{width:9px;height:9px;border-radius:50%;background:var(--bright)}.code-top i:nth-child(2){background:#a3e635}.code-top i:nth-child(3){background:#fbbf24}.code-window pre{margin:0;padding:28px;white-space:pre-wrap;font-family:var(--mono);font-size:14px;line-height:1.8}.code-window em{font-style:normal;color:var(--lime)}.check-list{display:grid;gap:14px;margin-top:26px}.check-item{display:grid;grid-template-columns:28px 1fr;gap:12px;align-items:start}.check-item i{width:24px;height:24px;border-radius:8px;background:var(--mint);position:relative}.check-item i::after{content:"";position:absolute;width:8px;height:4px;border-left:2px solid var(--green-deep);border-bottom:2px solid var(--green-deep);transform:rotate(-45deg);left:7px;top:7px}.compare{overflow-x:auto;border-radius:24px;background:#fff;box-shadow:var(--shadow)}.compare table{width:100%;border-collapse:collapse;min-width:680px}.compare th,.compare td{text-align:left;padding:18px 22px;border-bottom:1px solid var(--line)}.compare th{background:#f8fbfa;font-size:14px}.compare tr:last-child td{border:0}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;align-items:start}.faq-grid details{background:#fff;border-radius:18px;padding:20px 22px;color:var(--forest)}.faq-grid summary{font-weight:750;cursor:pointer}.faq-grid p{color:var(--muted);margin:13px 0 0}.cta-card{padding:52px;border-radius:30px;background:linear-gradient(130deg,#00bb7e,#34d399);display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}.cta-card h2{font-size:clamp(2rem,4vw,3.7rem)}.cta-card p{margin:12px 0 0;color:#123d32}.site-footer{padding:64px 24px 28px;background:#fff}.footer-inner{max-width:1160px;margin:auto}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px}.footer-brand img{height:42px;width:auto}.footer-brand p{max-width:300px;color:var(--muted)}.footer-col{display:grid;align-content:start;gap:8px}.footer-col strong{margin-bottom:8px}.footer-col a{color:var(--muted)}.footer-col a:hover{color:var(--green-deep)}.footer-bottom{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:14px;flex-wrap:wrap}.footer-langs{display:flex;gap:14px;flex-wrap:wrap}.toast{position:fixed;z-index:80;left:50%;bottom:24px;transform:translate(-50%,20px);width:max-content;max-width:min(430px,calc(100% - 32px));padding:12px 18px;border-radius:16px;background:var(--forest);color:#fff;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s}.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}.prose h2{font-size:clamp(1.6rem,3vw,2.2rem)}.prose h3{font-size:clamp(1.15rem,2vw,1.4rem)}.modal h2,.dialog h2{font-size:clamp(1.25rem,2vw,1.5rem)}@media(max-width:980px){.header-inner{grid-template-columns:1fr auto}.primary-nav{display:none}.nav-toggle{display:grid}.header-login{display:none}.card-grid{grid-template-columns:1fr}.split{grid-template-columns:minmax(0,1fr)}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){.announcement{font-size:12px}.header-inner{height:64px;padding:0 16px}.brand img{height:34px}.lang-switch summary{font-size:0;gap:0;width:42px;padding:8px}.lang-switch summary::before{content:"";font-size:15px}.mobile-nav{inset:103px 12px auto}.hero{padding:72px 18px 50px}.hero h1{font-size:clamp(3.25rem,18vw,5.4rem)}.hero-lead{margin-top:20px}.hero-actions .button{flex:1 1 150px}.mail-section{padding:0 12px 64px}.mail-shell{border-radius:22px}.mail-toolbar{padding:18px;align-items:stretch;flex-direction:column}.mail-actions{justify-content:flex-start}.mail-actions .tool-button{flex:1 1 95px}.mail-status{align-items:flex-start;flex-direction:column;padding:12px 18px}.inbox-grid{display:block;height:auto}.mail-list-pane{border-right:0;min-height:680px;max-height:740px}.reader{display:none}.section{padding:70px 18px}.scenario-grid,.faq-grid{grid-template-columns:minmax(0,1fr)}.card,.scenario{padding:24px}.cta-card{padding:32px 24px;grid-template-columns:minmax(0,1fr)}.footer-grid{grid-template-columns:minmax(0,1fr)}.footer-bottom{display:grid}.code-window pre{padding:22px;font-size:12px}}