:root {
    --ink: #10233d;
    --ink-soft: #53647a;
    --navy: #071b31;
    --navy-2: #0b2a49;
    --cyan: #0ca7c8;
    --teal: #0b8c7f;
    --lime: #a9dd5f;
    --surface: #ffffff;
    --surface-soft: #f3f7fa;
    --line: #dce6ed;
    --shadow: 0 18px 50px rgba(7, 27, 49, .1);
    --radius: 20px;
    --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--surface);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.22; letter-spacing: -.025em; }
h1 { font-size: clamp(2.5rem, 5.5vw, 4.75rem); }
h2 { font-size: clamp(2rem, 3.2vw, 3.1rem); }
h3 { font-size: 1.25rem; }
p { color: var(--ink-soft); }

.site-container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; background: #fff; padding: 10px 16px; border-radius: 8px; }
.skip-link:focus { top: 16px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.eyebrow { display: block; margin-bottom: 14px; color: var(--teal); font-size: .78rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading p { font-size: 1.08rem; }
.section { padding: 100px 0; }
.section-soft { background: var(--surface-soft); }
.section-dark { color: #fff; background: var(--navy); }
.section-dark p { color: #b7c8d8; }
.kicker-line { width: 54px; height: 4px; margin-bottom: 20px; border-radius: 99px; background: linear-gradient(90deg, var(--cyan), var(--lime)); }

.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(220, 230, 237, .85); background: rgba(255,255,255,.94); backdrop-filter: blur(16px); }
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand img { width: 120px; height: 32px; object-fit: contain; }
.brand-divider { width: 1px; height: 26px; background: var(--line); }
.brand-tagline { color: #607286; font-size: .74rem; font-weight: 700; letter-spacing: .08em; }
.primary-nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.primary-nav a { position: relative; padding: 25px 10px 22px; color: #344b63; font-size: .88rem; font-weight: 700; white-space: nowrap; }
.primary-nav a::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: 15px; height: 2px; transform: scaleX(0); background: var(--teal); transition: transform .2s ease; }
.primary-nav a:hover::after, .primary-nav a.is-active::after { transform: scaleX(1); }
.primary-nav a.is-active { color: var(--teal); }
.header-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.header-login { color: #486078; font-size: .88rem; font-weight: 700; }
.nav-toggle { display: none; width: 42px; height: 42px; margin-left: auto; border: 0; border-radius: 10px; background: var(--surface-soft); }
.nav-toggle > span:not(.sr-only) { display: block; width: 20px; height: 2px; margin: 4px auto; background: var(--ink); }

.button-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 8px; padding: 0 22px; border: 1px solid var(--teal); border-radius: 10px; color: #fff; background: var(--teal); font-weight: 800; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(11, 140, 127, .22); }
.button-small { min-height: 40px; padding: 0 16px; font-size: .88rem; }
.button-secondary { border-color: var(--ink); color: var(--ink); background: transparent; }
.button-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.button-light { border-color: #fff; color: var(--navy); background: #fff; }
.button-outline-light { border-color: rgba(255,255,255,.55); color: #fff; background: transparent; }
.text-link { color: var(--teal); font-weight: 800; }
.text-link::after { content: " →"; }

.hero { position: relative; overflow: hidden; padding: 92px 0 84px; color: #fff; background: var(--navy); }
.hero::before { content: ""; position: absolute; width: 520px; height: 520px; right: -160px; top: -230px; border: 1px solid rgba(12,167,200,.3); border-radius: 50%; box-shadow: 0 0 0 75px rgba(12,167,200,.04), 0 0 0 150px rgba(12,167,200,.025); }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan), transparent); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); gap: 68px; align-items: center; }
.hero .eyebrow { color: #7fe2d4; }
.hero h1 { max-width: 770px; margin-bottom: 24px; }
.hero h1 span { color: #88dfd1; }
.hero-copy { max-width: 720px; margin-bottom: 34px; color: #c5d4e1; font-size: 1.16rem; }
.hero-note { margin-top: 22px; color: #8fa9bf; font-size: .88rem; }
.platform-map { position: relative; padding: 28px; border: 1px solid rgba(255,255,255,.12); border-radius: 26px; background: rgba(255,255,255,.055); box-shadow: 0 30px 80px rgba(0,0,0,.24); backdrop-filter: blur(12px); }
.platform-map::before { content: ""; position: absolute; inset: 14px; border: 1px dashed rgba(127,226,212,.16); border-radius: 18px; pointer-events: none; }
.map-title { position: relative; display: flex; justify-content: space-between; margin-bottom: 20px; color: #9fb4c7; font-size: .76rem; font-weight: 800; letter-spacing: .1em; }
.map-stack { position: relative; display: grid; gap: 10px; }
.map-layer { display: grid; grid-template-columns: 120px 1fr; gap: 16px; align-items: center; padding: 15px 18px; border: 1px solid rgba(255,255,255,.1); border-radius: 13px; background: rgba(6,30,52,.82); }
.map-layer strong { color: #fff; }
.map-layer span { color: #9cb2c4; font-size: .88rem; }
.map-layer-accent { border-color: rgba(127,226,212,.32); background: linear-gradient(90deg, rgba(11,140,127,.32), rgba(6,30,52,.82)); }
.map-flow { display: flex; justify-content: space-between; margin-top: 16px; color: #7fe2d4; font-size: .76rem; font-weight: 800; }

.proof-strip { border-bottom: 1px solid var(--line); background: #fff; }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-item { padding: 24px 26px; border-right: 1px solid var(--line); }
.proof-item:first-child { border-left: 1px solid var(--line); }
.proof-item strong { display: block; margin-bottom: 4px; }
.proof-item span { color: var(--ink-soft); font-size: .86rem; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.card-grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 1px 0 rgba(7,27,49,.02); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-5px); border-color: #b9d8dd; box-shadow: var(--shadow); }
.card-number { display: inline-flex; width: 38px; height: 38px; align-items: center; justify-content: center; margin-bottom: 24px; border-radius: 11px; color: var(--teal); background: #e5f5f2; font-size: .82rem; font-weight: 900; }
.card p:last-child { margin-bottom: 0; }
.card ul, .check-list { padding: 0; margin: 20px 0 0; list-style: none; }
.card li, .check-list li { position: relative; padding: 7px 0 7px 23px; color: var(--ink-soft); }
.card li::before, .check-list li::before { content: ""; position: absolute; left: 0; top: 17px; width: 8px; height: 8px; border-radius: 50%; background: var(--teal); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 78px; align-items: center; }
.panel { padding: 36px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: var(--shadow); }
.data-path { display: grid; gap: 12px; }
.path-item { display: grid; grid-template-columns: 46px 1fr auto; gap: 16px; align-items: center; padding: 16px; border: 1px solid var(--line); border-radius: 14px; }
.path-icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: var(--navy-2); font-weight: 900; }
.path-item small { color: var(--ink-soft); }
.path-arrow { color: var(--teal); font-size: 1.4rem; }

.feature-band { overflow: hidden; border-radius: 28px; color: #fff; background: linear-gradient(120deg, #0b8c7f, #086b78 60%, #123e58); }
.feature-band-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; align-items: center; padding: 58px; }
.feature-band p { color: #d5f0ec; }
.feature-stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.feature-stat { padding: 20px; border: 1px solid rgba(255,255,255,.18); border-radius: 14px; background: rgba(255,255,255,.08); }
.feature-stat strong { display: block; font-size: 1.08rem; }
.feature-stat span { color: #d5f0ec; font-size: .85rem; }

.page-hero { padding: 84px 0 72px; color: #fff; background: linear-gradient(125deg, var(--navy), #0c3955); }
.page-hero .eyebrow { color: #7fe2d4; }
.page-hero h1 { max-width: 900px; margin-bottom: 22px; font-size: clamp(2.5rem, 5vw, 4.25rem); }
.page-hero p { max-width: 760px; margin-bottom: 0; color: #c5d4e1; font-size: 1.12rem; }
.page-hero .button-row { margin-top: 30px; }
.breadcrumbs { margin-bottom: 30px; color: #91a9bd; font-size: .84rem; }
.breadcrumbs a:hover { color: #fff; }

.timeline { display: grid; gap: 18px; }
.timeline-item { display: grid; grid-template-columns: 150px 1fr; gap: 28px; padding: 26px 0; border-top: 1px solid var(--line); }
.timeline-item:last-child { border-bottom: 1px solid var(--line); }
.timeline-label { color: var(--teal); font-weight: 900; }
.status-pill { display: inline-flex; padding: 4px 10px; border-radius: 999px; color: #17695f; background: #e1f3ef; font-size: .75rem; font-weight: 900; }
.status-pill-next { color: #845c0a; background: #fff1c9; }

.link-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.link-card { display: flex; min-height: 180px; flex-direction: column; justify-content: space-between; padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.link-card:hover { border-color: var(--teal); box-shadow: var(--shadow); }
.link-card span { color: var(--teal); font-weight: 800; }
.link-card small { color: var(--ink-soft); }

.form-shell { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.form-panel { padding: 38px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { display: grid; gap: 8px; }
.form-field-full { grid-column: 1 / -1; }
.form-field label { font-weight: 800; }
.form-field input, .form-field select, .form-field textarea { width: 100%; min-height: 48px; padding: 11px 13px; border: 1px solid #cbd8e1; border-radius: 10px; outline: none; background: #fff; }
.form-field textarea { min-height: 130px; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(11,140,127,.13); }
.form-help { color: var(--ink-soft); font-size: .84rem; }
.form-error, .field-validation-error { color: #b42318; }
.form-error ul { margin: 0 0 16px; padding: 12px 28px; border-radius: 10px; background: #fff1f0; }
.header-actions form { margin: 0; }
.auth-choice { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.auth-choice .card { display: flex; flex-direction: column; align-items: flex-start; }
.auth-choice .button { margin-top: auto; }

.contact-ribbon { padding: 42px 0; color: #fff; background: linear-gradient(110deg, #0b8c7f, #0b6074); }
.contact-ribbon-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.contact-ribbon .eyebrow { margin-bottom: 5px; color: #b8eee6; }
.contact-ribbon strong { font-size: clamp(1.3rem, 2.5vw, 2rem); }
.site-footer { padding: 66px 0 26px; color: #d7e1e9; background: #071724; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 54px; }
.footer-brand img { width: 120px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 330px; margin-top: 22px; color: #8fa4b5; }
.site-footer h2 { margin-bottom: 18px; color: #fff; font-size: .95rem; letter-spacing: .04em; }
.site-footer a { display: block; margin: 10px 0; color: #9fb1bf; font-size: .9rem; }
.site-footer a:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 18px 34px; margin-top: 52px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); color: #7f94a5; font-size: .82rem; }
.footer-bottom a { display: inline; margin: 0; }

.legacy-page-banner { padding: 60px 24px; color: #fff; text-align: center; background: var(--navy); }
.legacy-inline-cta { margin: 20px 0; text-align: center; }
.legacy-inline-cta a { display: inline-flex; padding: 12px 20px; border-radius: 10px; color: #fff; background: var(--teal); }

:focus-visible { outline: 3px solid #f0ba4d; outline-offset: 3px; }

@media (max-width: 1080px) {
    .brand-tagline, .brand-divider { display: none; }
    .primary-nav a { padding-inline: 7px; font-size: .8rem; }
    .hero-grid { grid-template-columns: 1fr; }
    .platform-map { max-width: 760px; }
    .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
    .header-inner { flex-wrap: wrap; min-height: 68px; }
    .nav-toggle { display: block; }
    .primary-nav { display: none; order: 4; width: 100%; flex-direction: column; align-items: stretch; padding: 0 0 16px; }
    .primary-nav.is-open { display: flex; }
    .primary-nav a { padding: 11px 4px; }
    .primary-nav a::after { left: 4px; right: auto; bottom: 6px; width: 34px; }
    .header-actions { margin-left: 0; }
    .split, .form-shell, .feature-band-inner { grid-template-columns: 1fr; }
    .proof-grid { grid-template-columns: 1fr 1fr; }
    .proof-item:nth-child(3) { border-left: 1px solid var(--line); }
    .card-grid, .link-cards { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
    .footer-grid > div:last-child { grid-column: 2; }
}

@media (max-width: 620px) {
    .site-container { width: min(calc(100% - 28px), var(--container)); }
    .header-actions .header-login { display: none; }
    .hero, .page-hero { padding: 64px 0 58px; }
    .hero-grid { gap: 42px; }
    .platform-map { padding: 20px; }
    .map-layer { grid-template-columns: 1fr; gap: 2px; }
    .section { padding: 72px 0; }
    .proof-grid, .card-grid, .card-grid-4, .link-cards, .feature-stat-grid, .form-grid, .auth-choice { grid-template-columns: 1fr; }
    .proof-item, .proof-item:nth-child(3) { border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .feature-band-inner { padding: 34px 24px; }
    .timeline-item { grid-template-columns: 1fr; gap: 8px; }
    .contact-ribbon-inner { align-items: flex-start; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-grid > div:last-child { grid-column: auto; }
    .footer-bottom { flex-direction: column; gap: 8px; }
    .form-panel { padding: 26px 20px; }
}