:root {
    --primary: #00a990;
    --primary-dark: #007d6d;
    --ink: #15211f;
    --muted: #66736f;
    --line: #dfe7e4;
    --surface: #f4f7f6;
    --white: #fff;
    --accent: #ff6b57;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif; letter-spacing: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header { position: fixed; z-index: 50; top: 0; right: 0; left: 0; height: 72px; border-bottom: 1px solid rgba(255,255,255,.2); background: rgba(9, 37, 34, .8); color: var(--white); backdrop-filter: blur(14px); }
.header-inner { display: flex; width: min(1180px, calc(100% - 48px)); height: 100%; margin: 0 auto; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; min-width: 0; align-items: center; gap: 12px; font-size: 17px; font-weight: 700; }
.brand img { width: 38px; height: 38px; border-radius: 8px; object-fit: cover; }
nav { display: flex; align-items: center; gap: 32px; font-size: 14px; }
nav a { color: rgba(255,255,255,.86); }
nav a:hover { color: #fff; }
.nav-download { padding: 10px 18px; border: 1px solid rgba(255,255,255,.6); border-radius: 4px; }
.menu-button { display: none; border: 0; color: #fff; background: transparent; font-size: 26px; }

.hero { position: relative; display: flex; min-height: min(820px, 90vh); overflow: hidden; align-items: center; background: #074f46; color: #fff; }
.hero-media { position: absolute; inset: 0 0 0 45%; overflow: hidden; background: #e9f3f1; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,69,61,.98) 0%, rgba(5,69,61,.94) 42%, rgba(5,69,61,.48) 68%, rgba(5,69,61,.12) 100%); }
.hero-content { position: relative; z-index: 2; width: min(1180px, calc(100% - 48px)); margin: 72px auto 0; padding: 88px 0 82px; }
.hero-kicker { margin: 0 0 18px; color: #a7e9df; font-size: 16px; font-weight: 600; }
.hero h1 { max-width: 660px; margin: 0; font-size: 64px; line-height: 1.12; }
.hero-subtitle { max-width: 660px; margin: 26px 0 0; font-size: 24px; font-weight: 600; line-height: 1.55; }
.hero-description { max-width: 610px; margin: 18px 0 0; color: rgba(255,255,255,.78); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; margin-top: 34px; gap: 12px; }
.download-note { margin: 12px 0 0; color: rgba(255,255,255,.66); font-size: 12px; }
.primary-action, .secondary-action { display: inline-flex; min-width: 142px; height: 48px; padding: 0 22px; border-radius: 4px; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; }
.primary-action { background: #fff; color: #006e61; }
.secondary-action { border: 1px solid rgba(255,255,255,.62); color: #fff; }
.hero-facts { display: flex; margin-top: 52px; gap: 28px; color: rgba(255,255,255,.72); font-size: 13px; }
.hero-facts span::before { content: ""; display: inline-block; width: 6px; height: 6px; margin: 0 9px 2px 0; border-radius: 50%; background: #79e0d1; }

.section-inner { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.role-band, .feature-band, .workflow-band, .about-band { padding: 94px 0; }
.section-heading { margin: 0 auto 46px; text-align: center; }
.section-heading.align-left { margin-left: 0; text-align: left; }
.section-heading p { margin: 0 0 12px; color: var(--primary-dark); font-size: 14px; font-weight: 700; }
.section-heading h2 { margin: 0; font-size: 36px; line-height: 1.35; }
.role-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.role-item { min-height: 260px; padding: 38px 34px; border-right: 1px solid var(--line); }
.role-item:last-child { border-right: 0; }
.role-index { color: var(--primary); font-size: 13px; font-weight: 700; }
.role-item:nth-child(2) .role-index { color: var(--accent); }
.role-item h3 { margin: 40px 0 16px; font-size: 22px; }
.role-item p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; }

.feature-band { background: var(--surface); }
.feature-layout { display: grid; grid-template-columns: minmax(320px, .85fr) minmax(440px, 1.15fr); align-items: center; gap: 100px; }
.product-shot { position: relative; height: 650px; overflow: hidden; border: 1px solid #cedbd7; border-radius: 8px; background: #0a9d89; box-shadow: 0 22px 60px rgba(17,52,48,.16); }
.product-shot img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.feature-list { border-top: 1px solid #cbd7d4; }
.feature-list article { display: grid; grid-template-columns: 120px 1fr; padding: 24px 0; border-bottom: 1px solid #cbd7d4; gap: 26px; }
.feature-list strong { font-size: 17px; }
.feature-list span { color: var(--muted); font-size: 14px; line-height: 1.8; }

.workflow-list { display: grid; margin: 0; padding: 0; grid-template-columns: repeat(4, minmax(0, 1fr)); list-style: none; }
.workflow-list li { position: relative; display: flex; min-height: 190px; padding: 28px 22px; border-top: 3px solid var(--primary); flex-direction: column; }
.workflow-list li:nth-child(even) { background: var(--surface); }
.workflow-list li:nth-child(3) { border-top-color: var(--accent); }
.workflow-list span { width: 34px; height: 34px; border: 1px solid var(--primary); border-radius: 50%; color: var(--primary-dark); text-align: center; line-height: 32px; }
.workflow-list strong { margin-top: 28px; font-size: 18px; }
.workflow-list small { margin-top: 12px; color: var(--muted); font-size: 13px; line-height: 1.7; }

.about-band { background: #122d29; color: #fff; }
.about-band .section-heading p { color: #7ee0d1; }
.about-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 100px; }
.about-description { max-width: 650px; margin: 0; color: rgba(255,255,255,.72); font-size: 16px; line-height: 2; }
.contact-list { margin: 12px 0 0; }
.contact-list div { display: grid; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.16); grid-template-columns: 100px 1fr; gap: 18px; }
.contact-list dt { color: rgba(255,255,255,.56); font-size: 13px; }
.contact-list dd { margin: 0; font-size: 14px; line-height: 1.6; }

footer { padding: 38px 0; border-top: 1px solid #dfe7e4; background: #fff; }
.footer-inner { display: grid; width: min(1180px, calc(100% - 48px)); margin: 0 auto; grid-template-columns: 1fr auto; gap: 18px 40px; }
.footer-inner strong { font-size: 17px; }
.footer-inner p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 18px; color: #44514e; font-size: 13px; }
.copyright { grid-column: 1 / -1; }

.maintenance { position: fixed; z-index: 1000; inset: 0; display: flex; padding: 24px; align-items: center; justify-content: center; flex-direction: column; background: #f4f7f6; text-align: center; }
.maintenance[hidden] { display: none; }
.maintenance img { width: 80px; height: 80px; border-radius: 16px; }
.maintenance h1 { margin: 24px 0 8px; font-size: 28px; }
.maintenance p { color: var(--muted); }
.is-maintenance { overflow: hidden; }

.legal-page { background: var(--surface); }
.legal-page .site-header { background: rgba(9,37,34,.96); }
.legal-main { min-height: calc(100vh - 170px); padding: 120px 24px 72px; }
.legal-main article { width: min(900px, 100%); margin: 0 auto; padding: 50px 64px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.legal-kicker { margin: 0 0 12px; color: var(--primary-dark); font-size: 13px; font-weight: 700; }
.legal-main h1 { margin: 0; font-size: 34px; }
.legal-date { margin: 12px 0 36px; padding-bottom: 22px; border-bottom: 1px solid var(--line); color: #8a9693; font-size: 13px; }
.legal-content { color: #35413e; font-size: 15px; line-height: 2; white-space: pre-wrap; }
.legal-content p { margin: 0 0 22px; }

@media (max-width: 900px) {
    .site-header { height: 64px; }
    .header-inner { width: calc(100% - 32px); }
    .menu-button { display: block; }
    nav { position: absolute; top: 64px; right: 0; left: 0; display: none; padding: 20px 24px 24px; align-items: stretch; flex-direction: column; gap: 18px; background: #092c27; }
    nav.is-open { display: flex; }
    .nav-download { text-align: center; }
    .hero { min-height: 780px; align-items: flex-end; }
    .hero-media { inset: 0; }
    .hero-media img { object-position: 68% 18%; }
    .hero-shade { background: linear-gradient(0deg, rgba(5,60,54,.99) 0%, rgba(5,60,54,.94) 58%, rgba(5,60,54,.46) 100%); }
    .hero-content { width: calc(100% - 36px); margin-top: 64px; padding: 120px 0 48px; }
    .hero h1 { font-size: 44px; }
    .hero-subtitle { font-size: 20px; }
    .hero-facts { flex-wrap: wrap; margin-top: 34px; gap: 12px 20px; }
    .section-inner { width: calc(100% - 36px); }
    .role-band, .feature-band, .workflow-band, .about-band { padding: 68px 0; }
    .section-heading h2 { font-size: 29px; }
    .role-grid { grid-template-columns: 1fr; }
    .role-item { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
    .role-item:last-child { border-bottom: 0; }
    .feature-layout, .about-layout { grid-template-columns: 1fr; gap: 54px; }
    .product-shot { width: min(460px, 100%); height: 570px; margin: 0 auto; }
    .workflow-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-inner { width: calc(100% - 36px); grid-template-columns: 1fr; }
    .footer-links { justify-content: flex-start; }
    .legal-main article { padding: 38px 28px; }
}

@media (max-width: 560px) {
    .brand span { overflow: hidden; max-width: 190px; text-overflow: ellipsis; white-space: nowrap; }
    .hero { min-height: 720px; }
    .hero h1 { font-size: 38px; }
    .hero-kicker { font-size: 14px; }
    .hero-description { font-size: 14px; }
    .hero-actions { align-items: stretch; flex-direction: column; }
    .primary-action, .secondary-action { width: 100%; }
    .section-heading { margin-bottom: 34px; }
    .section-heading h2 { font-size: 26px; }
    .role-item { padding: 30px 22px; }
    .role-item h3 { margin-top: 26px; }
    .product-shot { height: 520px; }
    .feature-list article { grid-template-columns: 1fr; gap: 8px; }
    .workflow-list { grid-template-columns: 1fr; }
    .contact-list div { grid-template-columns: 78px 1fr; }
    .legal-main { padding: 96px 16px 48px; }
    .legal-main article { padding: 32px 20px; }
    .legal-main h1 { font-size: 28px; }
}