:root{--paper:#fff;--ink:#191a1c;--forest:#01432b;--mint:#00cfb6;--mist:#f5f4f1;--lime:#dbf153;--muted:#58514f;--line:#d9d7d1;--danger:#a52d25;--radius:24px;--radius-sm:8px;--max:1200px;--h1:clamp(2.45rem,4vw,3rem);--h2:clamp(2rem,3.4vw,2.75rem);--h3:1.25rem;--body:1rem}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;font-size:var(--body);line-height:1.65}html[lang="zh"]{font-family:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei","Heiti SC",system-ui,sans-serif}html[lang="zh"] h1,html[lang="zh"] h2,html[lang="zh"] h3{letter-spacing:0;font-weight:600}button,input{font:inherit}a{color:inherit}img,svg{display:block;max-width:100%}.wrap{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid #e8e6e1}.header-row{height:76px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:750;letter-spacing:-.03em;white-space:nowrap}.brand img{width:34px;height:34px}.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}.main-nav a,.header-action,.lang-trigger{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 11px;border-radius:8px;text-decoration:none;font-size:.875rem;white-space:nowrap;border:0;background:transparent;color:var(--ink)}.main-nav a:hover,.main-nav a[aria-current]{background:var(--mist);font-weight:650}.header-tools{display:flex;align-items:center;gap:8px}.header-action{border:1px solid var(--line);padding-inline:15px}.header-action.primary{background:var(--ink);color:#fff}.header-action.primary:hover{background:var(--forest);color:#fff}.language-dropdown{position:relative}.lang-trigger{gap:7px;border:1px solid var(--line);cursor:pointer}.lang-trigger::after{content:"";width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}.lang-menu{position:absolute;right:0;top:calc(100% + 8px);width:180px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:12px;z-index:45}.lang-menu[hidden]{display:none}.lang-menu a{display:flex;align-items:center;justify-content:space-between;padding:9px 10px;border-radius:7px;text-decoration:none;font-size:.875rem}.lang-menu a:hover,.lang-menu a[aria-current]{background:var(--mist)}.lang-menu a[aria-current]::after{content:"";width:8px;height:4px;border-left:2px solid var(--forest);border-bottom:2px solid var(--forest);transform:rotate(-45deg)}.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:8px;background:#fff;align-items:center;justify-content:center;cursor:pointer}.nav-toggle span,.nav-toggle::before,.nav-toggle::after{content:"";display:block;width:18px;height:1.5px;background:var(--ink);position:absolute}.nav-toggle::before{transform:translateY(-6px)}.nav-toggle::after{transform:translateY(6px)}.mobile-nav-drawer{min-width:0}.mobile-nav-drawer:not([hidden]){display:grid}.mobile-nav-drawer[hidden]{display:none}.hero{padding:72px 0 48px}.hero-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;align-items:center}.eyebrow,.badge{display:flex;width:max-content;min-width:0;max-width:min(100%,calc(100vw - 40px));align-items:center;gap:8px;padding:5px 10px;border-radius:999px;background:#e4f7ef;color:var(--forest);font-size:.78rem;font-weight:700;letter-spacing:.02em}.eyebrow+h1,.eyebrow+h2,.badge+h2{margin-top:16px}.hero h1{font-size:var(--h1);line-height:1.18;letter-spacing:-1px;font-weight:650;margin:0;max-width:11em}.hero-copy{color:var(--muted);max-width:34em;margin:20px 0 0}.hero-actions{display:flex;gap:10px;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);text-decoration:none;font-weight:680;cursor:pointer}.button:hover{background:var(--mist);color:var(--ink)}.button.accent{border-color:var(--mint);background:var(--mint);color:#072b25}.button.accent:hover{background:#00bda7;color:#05271f}.button.dark{background:var(--ink);color:#fff}.button.dark:hover{background:var(--forest);color:#fff}.button:disabled{background:#e8e7e3;color:#777;border-color:#d3d1cc;cursor:not-allowed}.hero-note{margin:12px 0 0;color:#69625f;font-size:.78rem}.hero-visual{min-height:390px;border-radius:28px;background:var(--forest);padding:28px;position:relative;overflow:hidden}.workspace-art{height:334px;border-radius:18px;background:linear-gradient(145deg,#eceae3 0 52%,#d8d6ce 52%);position:relative;overflow:hidden}.workspace-art::before{content:"";position:absolute;width:64%;height:67%;left:18%;top:15%;border:10px solid #202522;border-bottom-width:20px;border-radius:8px;background:linear-gradient(135deg,#fff 0 48%,#dff7ef 48%)}.workspace-art::after{content:"";position:absolute;width:44%;height:18px;left:28%;bottom:10%;background:#b9b5a9;border-radius:50%}.float-card{position:absolute;background:#fff;color:var(--ink);border-radius:12px;padding:14px 16px;font-size:.79rem;line-height:1.35;border:1px solid #e4e2dc;animation:drift 5s ease-in-out infinite}.float-card strong{display:block}.float-card.code{top:40px;right:18px}.float-card.ready{left:16px;bottom:32px;animation-delay:-2s}.float-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--mint);margin-right:8px}@keyframes drift{50%{transform:translateY(-7px)}}section{scroll-margin-top:92px}.section{padding:88px 0}.section.mist{background:var(--mist)}.section.forest{background:var(--forest);color:#fff}.section-head{max-width:720px;margin-bottom:36px}.section-head h2{font-size:var(--h2);line-height:1.18;letter-spacing:-.7px;margin:0;font-weight:650}.section-head p{color:var(--muted);margin:16px 0 0}.forest .section-head p,.forest .muted{color:#d4e4dd}.component-dialog h2,.modal h2{font-size:clamp(1.25rem,3vw,1.5rem)}.prose h2{font-size:1.75rem}.prose h3{font-size:1.25rem}.inbox-shell{background:var(--forest);border-radius:28px;padding:20px}.inbox-toolbar{display:flex;align-items:center;gap:12px;background:#fff;border-radius:16px 16px 0 0;padding:16px}.address-block{flex:1;min-width:0}.address-label{display:block;color:var(--muted);font-size:.75rem}.address-value{display:block;font-weight:720;overflow-wrap:anywhere}.countdown{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;font-variant-numeric:tabular-nums;font-weight:700}.countdown::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--mint)}.tool-actions{display:flex;gap:8px;flex-wrap:wrap}.tool-button{min-height:40px;padding:0 13px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);cursor:pointer;font-weight:650}.tool-button:hover{background:var(--mist);color:var(--ink)}.tool-button.strong{background:var(--ink);border-color:var(--ink);color:#fff}.tool-button.strong:hover{background:var(--forest);color:#fff}.inbox-grid{height:628px;display:grid;grid-template-columns:minmax(250px,36%) minmax(0,64%);background:#fff;border-radius:0 0 16px 16px;overflow:hidden}.mail-list-panel{border-right:1px solid var(--line);min-width:0;display:flex;flex-direction:column}.list-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}.list-head h2,.reader-head h2{font-size:1.1rem;margin:0;letter-spacing:0}.list-head span{font-size:.78rem;color:var(--muted)}.mail-list{overflow:auto;min-height:0}.mail-row{width:100%;display:grid;grid-template-columns:38px minmax(0,1fr);gap:12px;padding:16px 18px;border:0;background:#fff;text-align:left;color:var(--ink);cursor:pointer;border-bottom:1px solid #eceae5}.mail-row:hover,.mail-row[aria-current]{background:var(--mist)}.sender-mark{width:38px;height:38px;border-radius:10px;background:var(--forest);color:#fff;display:grid;place-items:center;font-weight:800}.mail-row:nth-child(2) .sender-mark{background:#f1efeb;color:var(--ink);border:1px solid var(--line)}.mail-meta{min-width:0}.mail-from{display:flex;justify-content:space-between;gap:8px;font-size:.8rem}.mail-time{color:var(--muted);white-space:nowrap}.mail-subject{font-weight:720;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mail-preview{font-size:.78rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.demo-note{margin:14px 16px;padding:12px;border:1px dashed #c8c5bd;border-radius:10px;background:#faf9f7;color:var(--muted);font-size:.76rem}.reader{min-width:0;overflow:auto;background:#fff}.reader-inner{padding:24px 26px}.reader-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line)}.reader-head p{margin:4px 0 0;color:var(--muted);font-size:.83rem}.reader-body{padding-top:24px;color:#393633}.reader-body h3{font-size:1.35rem;margin:0 0 16px}.reader-body p{margin:0 0 16px}.verification-code{display:flex;width:max-content;max-width:100%;padding:14px 20px;background:var(--mist);border-radius:10px;font-size:1.8rem;letter-spacing:.2em;font-weight:800;margin:22px 0}.reader-iframe{width:100%;min-height:440px;border:0}.reader-close{display:none}.empty-state{margin:18px;padding:24px;border:1px dashed var(--line);border-radius:12px;background:var(--mist);color:var(--muted)}.toast{position:fixed;right:20px;bottom:20px;z-index:70;width:max-content;max-width:min(430px,calc(100% - 32px));padding:12px 16px;border-radius:14px;background:var(--ink);color:#fff;opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}.toast.show{opacity:1;transform:none}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.info-card{min-width:0;padding:28px;background:#fff;border-radius:20px}.mist .info-card{border:1px solid #e1dfd9}.info-card h3{font-size:var(--h3);margin:16px 0 8px}.info-card p{color:var(--muted);margin:0}.icon-tile{width:42px;height:42px;border-radius:12px;background:var(--lime);display:grid;place-items:center}.icon-tile svg{width:21px;height:21px}.split-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px}.dark-card{background:#075139;border-radius:24px;padding:38px;color:#fff}.dark-card p{color:#d6e7e0}.dark-card .eyebrow,.forest .eyebrow{background:#dbf153;color:#193322}.metric-list{display:grid;gap:12px;margin-top:28px}.metric{display:grid;grid-template-columns:90px 1fr;align-items:center;gap:14px}.metric-bar{height:8px;border-radius:99px;background:#37735f;overflow:hidden}.metric-bar 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a[aria-current]{background:var(--mist);font-weight:700}.hero-grid{grid-template-columns:minmax(0,1fr);gap:30px}.hero-copy-block{max-width:720px}.hero h1{max-width:14em}.hero-visual{min-height:360px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){.wrap{width:min(100% - 24px,var(--max))}.header-row{height:68px;gap:10px}.brand img{width:31px;height:31px}.language-dropdown{margin-left:auto}.lang-trigger{padding:0 9px}.nav-toggle{margin-left:0}.mobile-nav-drawer{inset:69px 0 auto}.hero{padding:48px 0 36px}.hero-actions{flex-direction:column}.hero-actions .button{width:100%}.hero-visual{padding:16px;min-height:300px}.workspace-art{height:270px}.section{padding:64px 0}.inbox-shell{padding:10px;border-radius:18px}.inbox-toolbar{align-items:flex-start;flex-wrap:wrap;padding:14px;border-radius:12px 12px 0 0}.address-block{flex:1 1 100%}.tool-actions{width:100%}.tool-button{flex:1 1 auto}.inbox-grid{height:auto;min-height:0;display:block;border-radius:0 0 12px 12px}.mail-list-panel{border-right:0;min-height:420px}.reader{position:fixed;inset:0;z-index:60;width:100%;height:100dvh;display:none}.reader.is-open{display:block}.reader-inner{min-height:100%;padding:22px 18px}.reader-close{display:inline-flex}.card-grid,.split-feature,.steps,.diagnosis-band{grid-template-columns:minmax(0,1fr)}.diagnosis-actions{justify-content:flex-start}.comparison-wrap{overflow-x:auto;touch-action:pan-x}.comparison{min-width:620px}.footer-grid{grid-template-columns:minmax(0,1fr)}.footer-bottom{flex-direction:column}.float-card.code{right:6px}.float-card.ready{left:6px}.section-head{margin-bottom:28px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.float-card{animation:none}}