:root {
  --ink: #16332b;
  --muted: #60716a;
  --cream: #f6f3eb;
  --paper: #fbfaf6;
  --mint: #dceee3;
  --green: #145c47;
  --line: #d9ded6;
  --orange: #f06e43;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.site-header, .section-shell, footer { max-width: 1180px; margin: 0 auto; }

.site-header {
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
}
.brand { display: inline-flex; gap: 10px; align-items: center; font-size: 19px; font-weight: 760; letter-spacing: -0.5px; }
.brand-mark { width: 29px; height: 29px; display: grid; place-items: center; border-radius: 9px; color: #fff; background: var(--green); font-size: 16px; font-family: Georgia, serif; }
nav { display: flex; gap: 34px; margin-left: 82px; }
nav a { color: #50645c; font-size: 14px; transition: color .2s ease; }
nav a:hover { color: var(--green); }
.header-action { border: 1px solid var(--ink); padding: 10px 17px; border-radius: 99px; font-size: 14px; font-weight: 650; }

.hero { min-height: 640px; padding: 88px 28px 72px; display: grid; grid-template-columns: minmax(0, .98fr) minmax(430px, .9fr); align-items: center; gap: 42px; }
.eyebrow { margin: 0 0 16px; color: var(--green); letter-spacing: 1.7px; font-size: 11px; font-weight: 760; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 590px; margin-bottom: 25px; font-size: clamp(47px, 5.4vw, 76px); line-height: 1.09; letter-spacing: -4px; font-weight: 760; }
h1 em { color: var(--green); font-family: Georgia, "Songti SC", serif; font-style: italic; font-weight: 500; }
.hero-description { max-width: 488px; color: var(--muted); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; gap: 22px; padding: 14px 20px; border-radius: 99px; font-size: 14px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--green); box-shadow: 0 11px 25px rgba(20, 92, 71, .2); }
.button-primary span, .button-light span { font-size: 20px; line-height: 12px; }
.button-secondary { border: 1px solid #bec9c1; color: #40574d; }
.hero-notes { margin-top: 37px; display: flex; align-items: center; gap: 10px; color: #748178; font-size: 12px; }
.hero-notes i { display: block; width: 3px; height: 3px; border-radius: 50%; background: #aab5ad; }

.hero-visual { min-height: 445px; position: relative; display: grid; place-items: center; border-radius: 30px; overflow: hidden; background: #dceee3; }
.orb { position: absolute; border-radius: 50%; filter: blur(1px); }
.orb-one { width: 330px; height: 330px; right: -65px; top: -82px; background: #c2e3cf; }
.orb-two { width: 230px; height: 230px; left: -80px; bottom: -90px; background: #e9bd85; opacity: .55; }
.transfer-card { position: relative; z-index: 1; width: min(88%, 425px); padding: 22px; border-radius: 18px; background: rgba(255,255,255,.93); box-shadow: 0 21px 50px rgba(26, 78, 57, .17); transform: rotate(-2deg); }
.card-topline, .file-row, .share-row { display: flex; align-items: center; justify-content: space-between; }
.mini-brand { font-size: 12px; font-weight: 760; }.mini-brand b { display: inline-grid; width: 18px; height: 18px; margin-right: 5px; place-items: center; border-radius: 5px; color: #fff; background: var(--green); }
.status-dot { color: #2e916e; font-size: 11px; }.status-dot::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 4px; border-radius: 50%; background: currentColor; }
.upload-area { display: flex; align-items: center; flex-direction: column; justify-content: center; min-height: 175px; margin: 21px 0 15px; border: 1px dashed #a6c5b2; border-radius: 12px; background: #f5faf7; color: #567064; }
.upload-area strong { margin: 9px 0 5px; color: #2d493e; font-size: 15px; }.upload-area span { font-size: 11px; }.file-icon { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 11px; color: var(--green); background: #d4ebdc; font-size: 26px; }
.file-row { padding: 11px 0; border-top: 1px solid #ebefec; }.file-type { padding: 8px 6px; border-radius: 7px; color: #d7502a; background: #fae3dc; font-size: 9px; font-weight: 800; }.file-info { flex: 1; margin-left: 10px; }.file-info strong, .file-info span { display: block; }.file-info strong { color: #385047; font-size: 12px; }.file-info span { margin-top: 3px; color: #849188; font-size: 10px; }.check { color: #2e916e; font-weight: 800; }.share-row { margin-top: 5px; padding: 11px; border-radius: 9px; color: #547166; background: #edf6ef; font-size: 11px; }.share-row b { color: var(--green); }
.floating-card { position: absolute; z-index: 2; display: flex; gap: 6px; align-items: center; padding: 9px 11px; border-radius: 8px; background: #fff; box-shadow: 0 10px 20px rgba(31, 75, 57, .13); color: #456255; font-size: 11px; font-weight: 690; }.floating-card span { color: var(--green); font-size: 17px; }.floating-lock { top: 52px; right: 18px; }.floating-time { bottom: 52px; left: 20px; }

.trust-band { display: flex; justify-content: center; gap: clamp(35px, 9vw, 125px); padding: 27px 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }.trust-band div { display: flex; align-items: baseline; gap: 9px; }.trust-band b { font-size: 17px; }.trust-band span { color: #7a8780; font-size: 13px; }
.capabilities { padding: 132px 28px; }.section-heading { max-width: 550px; }.section-heading h2, .security h2, .cta h2 { margin-bottom: 22px; font-size: clamp(35px, 4.2vw, 58px); line-height: 1.16; letter-spacing: -2.8px; }.section-heading > p:last-child { color: var(--muted); font-size: 16px; line-height: 1.8; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-top: 58px; }.feature-card { position: relative; min-height: 276px; padding: 25px; overflow: hidden; border: 1px solid #e1e5df; border-radius: 17px; background: #fff; }.feature-large { grid-column: span 2; background: #e9f1e9; }.feature-dark { color: #fff; background: var(--ink); border-color: var(--ink); }.feature-card h3 { margin: 18px 0 9px; font-size: 18px; }.feature-card p { position: relative; z-index: 1; max-width: 300px; margin: 0; color: #6a7a72; font-size: 13px; line-height: 1.75; }.feature-dark p { color: #c0d0c7; }.feature-symbol { display: grid; width: 39px; height: 39px; place-items: center; border-radius: 12px; color: var(--green); background: #d7ebdc; font-size: 23px; }.symbol-lock { background: #e8ebff; color: #5d66af; }.symbol-link { color: #e9a983; background: #485f56; }.symbol-team { color: #b4623a; background: #f7e2d6; }.file-stack { position: absolute; right: 31px; bottom: 29px; width: 115px; height: 95px; }.file-stack span { position: absolute; width: 77px; height: 85px; border-radius: 6px; border: 1px solid #c8d9cb; background: #fbfffb; }.file-stack span:nth-child(1) { right: 0; top: 0; }.file-stack span:nth-child(2) { right: 16px; top: 7px; background: #f3f8f3; }.file-stack span:nth-child(3) { right: 31px; top: 14px; background: #e6f2e7; }
.steps-section { padding: 105px 0; background: var(--green); color: #fff; }.steps-layout { display: grid; grid-template-columns: .88fr 1.12fr; gap: 80px; padding: 0 28px; }.steps-section .eyebrow { color: #acd7bc; }.steps-list { margin: 0; padding: 0; list-style: none; }.steps-list li { display: grid; grid-template-columns: 60px 1fr; gap: 20px; padding: 19px 0 24px; border-bottom: 1px solid rgba(255,255,255,.18); }.steps-list span { color: #acd7bc; font-size: 13px; font-weight: 700; }.steps-list h3 { margin-bottom: 6px; font-size: 19px; }.steps-list p { margin: 0; color: #d2e4d7; font-size: 14px; }
.security { padding: 126px 28px; }.security-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding: 57px; border-radius: 24px; background: #e7efe7; }.security h2 { margin-bottom: 0; }.security-copy { align-self: end; }.security-copy > p { color: #567064; font-size: 16px; line-height: 1.8; }.security-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }.security-points span { padding: 9px 11px; border: 1px solid #c5d7c8; border-radius: 99px; color: #426153; font-size: 12px; }
.cta { margin-bottom: 72px; padding: 87px 28px; text-align: center; border-radius: 24px; color: #fff; background: #153b31; }.cta .eyebrow { color: #b8dabe; }.cta h2 { margin-bottom: 34px; }.button-light { color: var(--ink); background: #f8f6ee; }
footer { display: flex; align-items: center; justify-content: space-between; padding: 28px; border-top: 1px solid var(--line); color: #738078; font-size: 12px; } footer .brand { color: var(--ink); font-size: 16px; } footer .brand-mark { width: 24px; height: 24px; border-radius: 7px; font-size: 13px; }

.knowledge { padding: 30px 28px 126px; }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 46px; }
.knowledge-card { min-height: 220px; padding: 27px; border: 1px solid var(--line); border-radius: 17px; background: #fff; transition: transform .2s ease, border-color .2s ease; }
.knowledge-card:hover { transform: translateY(-3px); border-color: #9cb6a5; }
.knowledge-card > span { color: var(--green); font-size: 12px; font-weight: 800; }
.knowledge-card h3 { margin: 34px 0 11px; font-size: 20px; }
.knowledge-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.inline-link { margin: 22px 0 0; color: var(--green) !important; font-weight: 700; }
.footer-links { display: flex; gap: 18px; }
.footer-links a:hover { color: var(--green); }

.content-hero { padding: 86px 28px 70px; border-top: 1px solid var(--line); }
.content-hero-inner { max-width: 820px; }
.content-hero h1 { margin-bottom: 26px; font-size: clamp(42px, 5vw, 68px); }
.content-hero .lead { max-width: 720px; color: var(--muted); font-size: 18px; line-height: 1.9; }
.breadcrumbs { margin-bottom: 28px; color: #718079; font-size: 13px; }
.breadcrumbs a { color: var(--green); }
.article-shell { max-width: 1180px; margin: 0 auto; padding: 0 28px 112px; }
.article-layout { display: grid; grid-template-columns: 220px minmax(0, 740px); gap: 70px; align-items: start; }
.toc { position: sticky; top: 28px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.toc strong { display: block; margin-bottom: 13px; font-size: 13px; }
.toc a { display: block; padding: 7px 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.toc a:hover { color: var(--green); }
.prose { min-width: 0; }
.prose section { margin-bottom: 58px; scroll-margin-top: 28px; }
.prose h2 { margin-bottom: 20px; font-size: 31px; line-height: 1.3; letter-spacing: -1.1px; }
.prose h3 { margin: 30px 0 12px; font-size: 20px; line-height: 1.45; }
.prose p, .prose li { color: #4f655c; font-size: 16px; line-height: 1.95; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li + li { margin-top: 8px; }
.callout { margin: 26px 0; padding: 21px 23px; border-left: 4px solid var(--green); border-radius: 0 12px 12px 0; background: #eaf3ec; }
.callout strong { display: block; margin-bottom: 6px; color: var(--ink); }
.callout p { margin: 0; font-size: 14px; }
.notice { border-left-color: var(--orange); background: #fbede7; }
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 25px 0; }
.info-card { padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.info-card h3 { margin: 0 0 10px; font-size: 17px; }
.info-card p { margin: 0; font-size: 14px; line-height: 1.75; }
.steps-compact { counter-reset: compact-step; list-style: none; padding: 0 !important; }
.steps-compact li { position: relative; margin: 0 0 14px; padding: 22px 22px 22px 66px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.steps-compact li::before { counter-increment: compact-step; content: counter(compact-step, decimal-leading-zero); position: absolute; left: 21px; top: 24px; color: var(--green); font-size: 12px; font-weight: 800; }
.question { padding: 25px 0; border-bottom: 1px solid var(--line); }
.question h2 { margin-bottom: 11px; font-size: 22px; letter-spacing: -.4px; }
.question p { margin-bottom: 0; }
.meta-note { margin-top: 22px; color: #7b8982; font-size: 13px; }
.contact-panel { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; margin-top: 28px; padding: 28px; border-radius: 16px; color: #fff; background: var(--ink); }
.contact-panel p { margin: 6px 0 0; color: #c9d8d1; font-size: 14px; }
.contact-panel a { padding: 12px 16px; border-radius: 99px; color: var(--ink); background: #fff; font-size: 14px; font-weight: 750; }
.simple-page { max-width: 820px; margin: 0 auto; padding: 76px 28px 110px; }
.simple-page h1 { font-size: clamp(40px, 5vw, 62px); }
.simple-page .prose section { margin-bottom: 46px; }
.error-page { min-height: calc(100vh - 160px); display: grid; place-items: center; padding: 50px 24px; text-align: center; }
.error-page h1 { margin-bottom: 16px; }
.error-page p { max-width: 530px; margin: 0 auto 28px; color: var(--muted); font-size: 16px; line-height: 1.8; }

@media (max-width: 760px) {
  .site-header { height: 70px; padding: 0 20px; } nav { display: none; }.header-action { padding: 8px 12px; font-size: 12px; }
  .hero { min-height: auto; padding: 58px 20px 50px; grid-template-columns: 1fr; }.hero-copy { order: 0; } h1 { font-size: 51px; letter-spacing: -3px; }.hero-description { font-size: 15px; }.hero-visual { min-height: 400px; margin-top: 10px; }.transfer-card { width: 86%; }.floating-lock { right: 5px; }.floating-time { left: 8px; }
  .trust-band { display: grid; grid-template-columns: 1fr; gap: 15px; padding: 24px 26px; }.trust-band div { justify-content: space-between; }.capabilities, .security { padding: 82px 20px; }.feature-grid { grid-template-columns: 1fr; margin-top: 36px; }.feature-large { grid-column: auto; }.feature-card { min-height: 235px; }.steps-section { padding: 74px 0; }.steps-layout, .security-panel { grid-template-columns: 1fr; gap: 36px; }.steps-layout { padding: 0 20px; }.security-panel { padding: 32px 25px; }.knowledge { padding: 15px 20px 80px; }.knowledge-grid { grid-template-columns: 1fr; }.knowledge-card { min-height: 180px; }.cta { margin: 0 20px 45px; padding: 64px 22px; }.cta h2 { font-size: 37px; letter-spacing: -2px; } footer { flex-wrap: wrap; gap: 17px; padding: 24px 20px; }.footer-links { order: 3; width: 100%; flex-wrap: wrap; }.content-hero { padding: 58px 20px 48px; }.content-hero h1 { font-size: 44px; letter-spacing: -2.4px; }.content-hero .lead { font-size: 16px; }.article-shell { padding: 0 20px 80px; }.article-layout { grid-template-columns: 1fr; gap: 36px; }.toc { position: static; }.prose h2 { font-size: 27px; }.prose p, .prose li { font-size: 15px; }.info-grid { grid-template-columns: 1fr; }.contact-panel { grid-template-columns: 1fr; }.contact-panel a { justify-self: start; }.simple-page { padding: 58px 20px 80px; }
}