:root {
  color-scheme: light;
  --primary: #16a36a;
  --primary-strong: #08764b;
  --accent: #f2b84b;
  --ink: #13221c;
  --muted: #617069;
  --line: #dbe5df;
  --surface: #ffffff;
  --surface-soft: #f2f7f4;
  --surface-strong: #e4f1e9;
  --danger: #a9492f;
  --shadow: 0 22px 60px rgba(18, 58, 39, .12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --shell: min(1160px, calc(100% - 40px));
  --font: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --ink: #eef8f2;
  --muted: #a7b9b0;
  --line: #2e4339;
  --surface: #12231b;
  --surface-soft: #0d1b15;
  --surface-strong: #1b3327;
  --primary: #42ce90;
  --primary-strong: #72e5ad;
  --danger: #ffad92;
  --shadow: 0 22px 60px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; background: var(--surface); color: var(--ink); font-family: var(--font); line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
img { display: block; max-width: 100%; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: 12px; z-index: 100; padding: 10px 14px; border-radius: 10px; background: var(--ink); color: var(--surface); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid transparent; background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(16px); }
.site-header[data-elevated="true"] { border-color: var(--line); }
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand img { width: 43px; height: 43px; }
.brand span { display: grid; line-height: 1.18; }
.brand strong { font-size: 16px; letter-spacing: .02em; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .16em; }
.desktop-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.desktop-nav a { color: var(--muted); font-size: 14px; font-weight: 650; text-decoration: none; }
.desktop-nav a:hover { color: var(--primary-strong); }
.theme-toggle { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; background: var(--surface-soft); color: var(--ink); cursor: pointer; }

.hero { overflow: hidden; padding: 92px 0 88px; background: radial-gradient(circle at 78% 20%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 22%), linear-gradient(150deg, var(--surface) 20%, var(--surface-soft) 100%); }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 76px; }
.eyebrow, .kicker { margin: 0 0 14px; color: var(--primary-strong); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 7px 11px; border: 1px solid color-mix(in srgb, var(--primary) 26%, var(--line)); border-radius: 999px; background: color-mix(in srgb, var(--primary) 8%, var(--surface)); letter-spacing: .05em; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 5px color-mix(in srgb, var(--primary) 16%, transparent); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { max-width: 680px; margin: 0; font-size: clamp(44px, 6vw, 76px); line-height: 1.08; letter-spacing: -.055em; }
.hero-lead { max-width: 650px; margin: 26px 0 0; color: var(--muted); font-size: clamp(17px, 2.1vw, 20px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 0 20px; border: 1px solid transparent; border-radius: 13px; font-weight: 750; text-decoration: none; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover:not([aria-disabled="true"]):not(:disabled) { transform: translateY(-2px); }
.button-primary { background: var(--primary); color: #052b1b; box-shadow: 0 10px 26px color-mix(in srgb, var(--primary) 30%, transparent); }
html:not([data-theme="dark"]) .button-primary { color: #fff; }
.button-secondary { border-color: var(--line); background: var(--surface); color: var(--ink); }
.button[aria-disabled="true"], .button:disabled { opacity: .56; cursor: not-allowed; box-shadow: none; }
.template-status { margin: 16px 0 0; color: var(--danger); font-size: 13px; font-weight: 700; }
.trust-list { display: flex; flex-wrap: wrap; gap: 18px; margin: 28px 0 0; padding: 0; color: var(--muted); font-size: 13px; list-style: none; }
.trust-list li { display: flex; align-items: center; gap: 7px; }
.trust-list li::before { content: "✓"; display: grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: var(--surface-strong); color: var(--primary-strong); font-weight: 900; }

.hero-panel { position: relative; padding: 28px; border: 1px solid color-mix(in srgb, var(--line) 74%, transparent); border-radius: var(--radius-lg); background: color-mix(in srgb, var(--surface) 88%, transparent); box-shadow: var(--shadow); }
.hero-panel::before { content: ""; position: absolute; inset: 18px -18px -18px 18px; z-index: -1; border-radius: var(--radius-lg); background: var(--surface-strong); }
.panel-topline { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--line); font-size: 14px; font-weight: 800; }
.live-chip { padding: 4px 9px; border-radius: 999px; background: var(--surface-strong); color: var(--primary-strong); font-size: 12px; }
.mini-steps { display: grid; gap: 4px; margin: 17px 0; padding: 0; list-style: none; }
.mini-steps li { display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: 12px; padding: 12px 8px; border-radius: 14px; }
.mini-steps li:hover { background: var(--surface-soft); }
.mini-steps > li > span { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 12px; color: var(--primary-strong); font-size: 12px; font-weight: 900; }
.mini-steps p { display: grid; margin: 0; line-height: 1.45; }
.mini-steps small { color: var(--muted); }
.panel-note { display: flex; align-items: center; gap: 9px; padding: 12px; border-radius: 12px; background: color-mix(in srgb, var(--accent) 15%, var(--surface)); color: var(--muted); font-size: 13px; }
.panel-note span { display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); color: #4e3600; font-weight: 900; }

.section { padding: 104px 0; }
.section-tint { background: var(--surface-soft); }
.section-heading { max-width: 680px; margin-bottom: 44px; }
.section-heading h2, .learn-intro h2, .safety-content h2, .contact-card h2 { margin: 0; font-size: clamp(32px, 4.4vw, 50px); line-height: 1.14; letter-spacing: -.04em; }
.section-heading > p:not(.kicker), .learn-intro > p:not(.kicker), .contact-card p { margin: 16px 0 0; color: var(--muted); }
.split-heading { max-width: none; display: flex; justify-content: space-between; align-items: end; gap: 28px; }
.updated { flex: none; padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; }
.card-grid { display: grid; gap: 18px; }
.pricing-grid { grid-template-columns: repeat(3, 1fr); }
.price-card { position: relative; display: flex; min-width: 0; flex-direction: column; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.price-card:first-child { border-color: color-mix(in srgb, var(--primary) 52%, var(--line)); box-shadow: 0 16px 40px color-mix(in srgb, var(--primary) 10%, transparent); }
.price-card .card-index { color: var(--primary-strong); font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.price-card h3 { margin: 12px 0 5px; font-size: 22px; }
.energy-value { margin: 0; color: var(--muted); }
.price-line { display: flex; align-items: baseline; gap: 8px; margin: 25px 0 5px; }
.price-value { color: var(--ink); font-size: clamp(28px, 4vw, 42px); font-weight: 850; letter-spacing: -.04em; }
.price-unit { color: var(--muted); font-size: 13px; }
.validity { margin: 0; color: var(--primary-strong); font-size: 13px; font-weight: 750; }
.card-note { margin: 22px 0 0; padding-top: 17px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.section-footnote { margin: 22px 0 0; color: var(--muted); font-size: 13px; }

.step-grid { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin: 0; padding: 0; list-style: none; }
.step-card { counter-increment: step; position: relative; padding: 26px 24px; border-top: 3px solid var(--primary); border-radius: 0 0 var(--radius-md) var(--radius-md); background: var(--surface); }
.step-card::before { content: "0" counter(step); display: block; margin-bottom: 36px; color: var(--primary-strong); font-size: 13px; font-weight: 900; letter-spacing: .12em; }
.step-card h3 { margin: 0; font-size: 20px; }
.step-card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.feature-grid { grid-template-columns: repeat(4, 1fr); }
.feature-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.feature-icon { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 28px; border-radius: 13px; background: var(--surface-strong); color: var(--primary-strong); font-weight: 900; }
.feature-card h3 { margin: 0; font-size: 18px; }
.feature-card p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }

.learn-section { background: var(--ink); color: var(--surface); }
html[data-theme="dark"] .learn-section { background: #07130e; color: var(--ink); }
.learn-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.learn-intro { position: sticky; top: 110px; align-self: start; }
.learn-section .kicker { color: var(--accent); }
.learn-section .learn-intro > p:not(.kicker) { color: color-mix(in srgb, var(--surface) 68%, transparent); }
html[data-theme="dark"] .learn-section .learn-intro > p:not(.kicker) { color: var(--muted); }
.learn-list { display: grid; gap: 14px; }
.learn-item { padding: 26px; border: 1px solid color-mix(in srgb, var(--surface) 18%, transparent); border-radius: var(--radius-md); background: color-mix(in srgb, var(--surface) 7%, transparent); }
.learn-item h3 { margin: 0; font-size: 20px; }
.learn-item p { margin: 9px 0 0; color: color-mix(in srgb, var(--surface) 66%, transparent); }
html[data-theme="dark"] .learn-item p { color: var(--muted); }

.safety-section { padding-top: 80px; }
.safety-card { display: grid; grid-template-columns: 74px 1fr; gap: 26px; padding: 42px; border: 1px solid color-mix(in srgb, var(--accent) 46%, var(--line)); border-radius: var(--radius-lg); background: color-mix(in srgb, var(--accent) 10%, var(--surface)); }
.safety-badge { display: grid; place-items: center; width: 64px; height: 64px; border-radius: 20px; background: var(--accent); color: #4e3600; font-size: 30px; font-weight: 900; }
.safety-content ul { display: grid; gap: 10px; margin: 24px 0 0; padding-left: 21px; color: var(--muted); }
.faq-shell { max-width: 860px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: 15px; background: var(--surface); }
.faq-item summary { position: relative; padding: 20px 56px 20px 22px; cursor: pointer; font-weight: 750; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 22px; top: 50%; color: var(--primary-strong); font-size: 24px; transform: translateY(-50%); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 22px 21px; color: var(--muted); }
.faq-answer p { margin: 0; }

.contact-section { padding-top: 56px; }
.contact-card { display: grid; grid-template-columns: 1.25fr .75fr; gap: 50px; align-items: center; padding: 48px; border-radius: var(--radius-lg); background: var(--surface-soft); }
.contact-actions { display: grid; gap: 10px; }
.copy-status { min-height: 1.5em; margin: 0; font-size: 12px; text-align: center; }
.site-footer { padding: 38px 0 110px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 50px; }
.footer-brand { display: grid; align-content: start; }
.footer-brand span, .site-footer p { margin: 0; color: var(--muted); font-size: 12px; }
.mobile-cta { display: none; }
.noscript { position: fixed; inset: auto 16px 16px; z-index: 100; padding: 14px; border-radius: 12px; background: #8e2f1d; color: white; text-align: center; }
.not-found-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: var(--surface-soft); }
.not-found-card { max-width: 520px; padding: 52px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); text-align: center; box-shadow: var(--shadow); }
.error-code { margin: 0; color: var(--primary-strong); font-size: 72px; font-weight: 900; line-height: 1; }
.not-found-card h1 { margin: 18px 0 0; font-size: 34px; }
.not-found-card p:not(.error-code) { color: var(--muted); }
.not-found-card .button { margin-top: 12px; }

@media (max-width: 920px) {
  .desktop-nav { display: none; }
  .hero { padding: 70px 0 74px; }
  .hero-grid, .learn-grid, .contact-card { grid-template-columns: 1fr; }
  .hero-grid { gap: 55px; }
  .learn-grid { gap: 44px; }
  .learn-intro { position: static; }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .price-card:last-child { grid-column: 1 / -1; }
  .step-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 18px; }
}

@media (max-width: 600px) {
  :root { --shell: min(100% - 28px, 1160px); }
  html { scroll-padding-top: 72px; }
  .nav-wrap { min-height: 66px; }
  .brand img { width: 38px; height: 38px; }
  .brand small { display: none; }
  .hero { padding: 48px 0 54px; }
  .hero-grid { gap: 42px; }
  h1 { font-size: clamp(40px, 13vw, 58px); }
  .hero-lead { margin-top: 20px; font-size: 16px; }
  .hero-actions { display: grid; margin-top: 27px; }
  .trust-list { gap: 10px 15px; }
  .hero-panel { padding: 20px; }
  .hero-panel::before { inset: 11px -8px -8px 11px; }
  .section { padding: 76px 0; }
  .section-heading { margin-bottom: 30px; }
  .section-heading h2, .learn-intro h2, .safety-content h2, .contact-card h2 { font-size: 34px; }
  .split-heading { display: block; }
  .updated { display: inline-block; margin-top: 18px !important; }
  .pricing-grid, .step-grid, .feature-grid { grid-template-columns: 1fr; }
  .price-card:last-child { grid-column: auto; }
  .step-card::before { margin-bottom: 24px; }
  .learn-grid { gap: 32px; }
  .safety-card { grid-template-columns: 1fr; gap: 18px; padding: 28px 22px; }
  .safety-badge { width: 52px; height: 52px; border-radius: 16px; }
  .contact-card { gap: 32px; padding: 32px 22px; }
  .site-footer { padding-bottom: 118px; }
  .mobile-cta { position: fixed; inset: auto 0 0; z-index: 29; display: block; padding: 10px 14px max(10px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(15px); }
  .mobile-cta .button { width: 100%; min-height: 48px; }
  .not-found-card { padding: 38px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}