:root {
  --navy-950: #04111f;
  --navy-900: #071a2b;
  --navy-800: #0c2941;
  --ink: #102334;
  --muted: #607080;
  --line: #dce6ec;
  --paper: #f5f8fa;
  --white: #ffffff;
  --green: #059669;
  --green-light: #a7f3d0;
  --shadow: 0 18px 50px rgba(7, 26, 43, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 999; padding: 10px 16px; color: #fff; background: var(--green); border-radius: 8px; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(4, 17, 31, .96); border-bottom: 1px solid rgba(255,255,255,.08); }
.header-inner { width: min(1180px, calc(100% - 40px)); min-height: 74px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { width: 238px; flex: 0 0 auto; text-decoration: none; }
.brand img { width: 100%; height: auto; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a { position: relative; padding: 24px 0; color: #dce8ef; font-size: 15px; text-decoration: none; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 17px; height: 2px; background: var(--green-light); transition: right .2s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; border-radius: 10px; background: rgba(255,255,255,.08); }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: #fff; }

.hero { position: relative; min-height: 600px; display: grid; align-items: center; overflow: hidden; color: #fff; background: var(--navy-950); }
.hero-media, .hero-media img, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media img { object-fit: cover; }
.hero-shade { background: linear-gradient(90deg, rgba(2, 12, 24, .96) 0%, rgba(3, 17, 30, .80) 42%, rgba(3, 17, 30, .18) 75%); }
.hero-content { position: relative; z-index: 1; padding-block: 88px; }
.eyebrow, .kicker { margin: 0 0 12px; color: #18c990; font-size: 13px; font-weight: 800; letter-spacing: .18em; }
.hero h1 { max-width: 670px; margin: 0; font-size: clamp(42px, 6vw, 76px); line-height: 1.12; letter-spacing: -.035em; }
.hero-lead { max-width: 610px; margin: 24px 0 0; color: #d9e5ec; font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 23px; border: 1px solid transparent; border-radius: 10px; font-weight: 700; text-decoration: none; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #032016; background: var(--green-light); }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.38); background: rgba(4,17,31,.28); }
.hero-points { display: flex; gap: 28px; margin: 34px 0 0; padding: 0; list-style: none; color: #c5d5dd; font-size: 14px; }
.hero-points li::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: #1bd09a; }

.signal-bar { position: relative; z-index: 2; color: #e4edf2; background: var(--navy-900); border-top: 1px solid rgba(255,255,255,.08); }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal-grid div { display: flex; align-items: center; gap: 14px; min-height: 84px; padding: 18px 24px; border-right: 1px solid rgba(255,255,255,.09); }
.signal-grid div:first-child { border-left: 1px solid rgba(255,255,255,.09); }
.signal-grid strong { color: #38ddb0; font-size: 14px; }
.signal-grid span { font-size: 14px; }

.update-strip { color: #b8c9d3; background: #092238; border-top: 1px solid rgba(255,255,255,.06); }
.update-strip .shell { min-height: 46px; display: flex; align-items: center; gap: 8px; font-size: 13px; }
.update-strip time { color: #fff; font-weight: 700; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: #20d49e; box-shadow: 0 0 0 5px rgba(32,212,158,.13); }

.section { padding-block: 100px; }
.section-heading { max-width: 780px; margin-bottom: 42px; }
.section-heading.narrow { max-width: 630px; }
.section-heading h2, .method-copy h2, .faq-intro h2, .about-section h2 { margin: 0; color: var(--navy-900); font-size: clamp(30px, 4vw, 46px); line-height: 1.25; letter-spacing: -.025em; }
.section-heading > p:last-child, .faq-intro > p:last-child { margin: 16px 0 0; color: var(--muted); font-size: 17px; }

.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scenario-card { --accent: var(--green); position: relative; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 12px 32px rgba(7,26,43,.05); }
.scenario-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--accent); }
.accent-blue { --accent: #2563eb; }.accent-amber { --accent: #d97706; }.accent-violet { --accent: #7c3aed; }.accent-red { --accent: #dc2626; }.accent-cyan { --accent: #0891b2; }
.card-top { display: flex; align-items: center; justify-content: space-between; color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.card-top b { font-size: 24px; opacity: .18; }
.scenario-card h3 { margin: 13px 0 9px; color: var(--navy-900); font-size: 21px; line-height: 1.35; }
.prediction-line { display: grid; grid-template-columns: auto 1fr auto 1fr; gap: 8px; align-items: center; margin: 0 0 16px; padding: 11px 12px; border-radius: 10px; background: var(--paper); }
.prediction-line span { color: #7a8a96; font-size: 12px; }
.prediction-line strong { color: var(--accent); font-size: 15px; }
.scenario-card > p { min-height: 112px; margin: 0; color: var(--muted); font-size: 15px; }
.scenario-card dl { margin: 22px 0 0; padding-top: 18px; border-top: 1px solid var(--line); }
.scenario-card dl div { display: grid; grid-template-columns: 74px 1fr; gap: 12px; margin-top: 8px; font-size: 13px; }
.scenario-card dt { color: #82909b; }.scenario-card dd { margin: 0; color: var(--ink); font-weight: 650; }

.method-section { padding-block: 92px; color: #e6eef2; background: var(--navy-950); }
.method-grid { display: grid; grid-template-columns: 1.03fr .97fr; gap: 60px; align-items: center; }
.method-media { overflow: hidden; border-radius: 20px; box-shadow: 0 28px 60px rgba(0,0,0,.30); }
.method-media img { width: 100%; height: auto; }
.method-copy h2 { color: #fff; }
.method-list { margin: 30px 0 0; padding: 0; list-style: none; counter-reset: steps; }
.method-list li { display: grid; grid-template-columns: 130px 1fr; gap: 18px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.10); }
.method-list strong { color: var(--green-light); }.method-list span { color: #bdcbd4; font-size: 15px; }

.evidence { padding-bottom: 110px; }
.evidence-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.evidence-grid article { padding: 26px; border-radius: 16px; background: var(--paper); }
.evidence-grid span { display: block; color: var(--green); font-size: 13px; font-weight: 800; }
.evidence-grid h3 { margin: 10px 0 8px; font-size: 19px; }.evidence-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.faq-section { padding-block: 100px; background: var(--paper); }
.faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 70px; }
.faq-intro { position: sticky; top: 120px; align-self: start; }
.faq-list details { border-bottom: 1px solid #cfdae1; }
.faq-list summary { position: relative; padding: 22px 42px 22px 0; color: var(--navy-900); font-size: 17px; font-weight: 750; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 20px; color: var(--green); font-size: 25px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -5px 0 22px; padding-right: 36px; color: var(--muted); font-size: 15px; }

.about-section { padding-block: 90px; }
.about-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 70px; }
.about-copy p { margin: 0 0 18px; color: var(--muted); font-size: 16px; }

.editorial-section { padding-block: 90px; background: var(--paper); }
.editorial-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; }
.editorial-card, .contact-card { padding: 36px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 12px 32px rgba(7,26,43,.05); }
.editorial-card h2, .contact-card h2, .privacy-heading h2 { margin: 0 0 22px; color: var(--navy-900); font-size: clamp(28px, 3vw, 39px); line-height: 1.25; }
.editorial-card p { margin: 0 0 13px; color: var(--muted); font-size: 14px; }
.editorial-card strong { color: var(--ink); }
.contact-card address { font-style: normal; }
.contact-card address p { display: grid; grid-template-columns: 82px 1fr; gap: 12px; margin: 0; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 14px; }
.contact-card address span { color: #7b8b96; }
.contact-card a { color: #047857; font-weight: 700; text-decoration: none; }
.contact-note { margin: 18px 0 0; color: var(--muted); font-size: 13px; }

.privacy-section { padding-block: 100px; color: #d7e2e8; background: var(--navy-900); }
.privacy-wrap { display: grid; grid-template-columns: .62fr 1.38fr; gap: 70px; }
.privacy-heading { position: sticky; top: 110px; align-self: start; }
.privacy-heading h2 { color: #fff; }
.privacy-heading > p:last-child { color: #9fb1bc; font-size: 14px; }
.privacy-content { display: grid; gap: 28px; }
.privacy-content section { padding-bottom: 26px; border-bottom: 1px solid rgba(255,255,255,.10); }
.privacy-content section:last-child { border-bottom: 0; }
.privacy-content h3 { margin: 0 0 9px; color: var(--green-light); font-size: 17px; }
.privacy-content p { margin: 0; color: #b9c8d1; font-size: 14px; }
.privacy-content a { color: var(--green-light); }

.site-footer { padding-top: 70px; color: #aebdc6; background: var(--navy-950); }
.footer-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr .8fr; gap: 38px; }
.footer-brand img { width: 220px; height: auto; }.footer-brand p { max-width: 410px; line-height: 1.8; }
.footer-grid h2 { margin: 4px 0 15px; color: #fff; font-size: 16px; }.footer-grid p { margin: 0 0 9px; font-size: 13px; }.footer-grid a { color: var(--green-light); }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; margin-top: 50px; padding-block: 22px; border-top: 1px solid rgba(255,255,255,.09); }
.footer-bottom p { margin: 0; font-size: 12px; }

@media (max-width: 980px) {
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .method-grid, .faq-layout, .about-grid, .privacy-wrap { grid-template-columns: 1fr; gap: 42px; }
  .faq-intro { position: static; }
  .privacy-heading { position: static; }
  .evidence-grid { grid-template-columns: repeat(2, 1fr); }
  .editorial-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .shell, .header-inner { width: min(100% - 28px, 1180px); }
  .header-inner { min-height: 66px; }
  .brand { width: 184px; }
  .menu-toggle { display: block; }
  .site-nav { position: absolute; top: 66px; left: 0; right: 0; display: none; padding: 8px 14px 18px; background: var(--navy-900); border-top: 1px solid rgba(255,255,255,.08); box-shadow: 0 15px 30px rgba(0,0,0,.25); }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 12px 8px; border-bottom: 1px solid rgba(255,255,255,.07); }
  .site-nav a::after { display: none; }
  .hero { min-height: 620px; align-items: end; }
  .hero-shade { background: linear-gradient(180deg, rgba(3,15,28,.76) 0%, rgba(3,15,28,.55) 38%, rgba(3,15,28,.95) 100%); }
  .hero-content { padding-block: 64px 45px; }
  .hero h1 { max-width: 360px; font-size: 42px; }
  .hero-lead { max-width: 470px; margin-top: 16px; font-size: 15px; line-height: 1.75; }
  .hero-actions { margin-top: 24px; }
  .button { min-height: 44px; padding-inline: 18px; font-size: 14px; }
  .hero-points { gap: 15px; margin-top: 22px; font-size: 12px; }
  .signal-grid { grid-template-columns: repeat(2, 1fr); }
  .signal-grid div, .signal-grid div:first-child { min-height: 66px; padding: 12px 14px; border: 1px solid rgba(255,255,255,.07); border-width: 0 1px 1px 0; }
  .signal-grid span { font-size: 12px; }
  .update-strip .shell { min-height: 42px; font-size: 12px; }
  .section, .faq-section { padding-block: 68px; }
  .section-heading { margin-bottom: 28px; }
  .section-heading h2, .method-copy h2, .faq-intro h2, .about-section h2 { font-size: 30px; }
  .section-heading > p:last-child, .faq-intro > p:last-child { font-size: 15px; }
  .scenario-grid { grid-template-columns: 1fr; gap: 14px; }
  .scenario-card { padding: 22px; border-radius: 14px; }
  .scenario-card > p { min-height: 0; font-size: 14px; }
  .prediction-line { grid-template-columns: auto 1fr auto 1fr; gap: 6px; }
  .scenario-card dl { margin-top: 16px; }
  .method-section { padding-block: 68px; }
  .method-grid { gap: 30px; }
  .method-media { border-radius: 14px; }
  .method-list { margin-top: 22px; }
  .method-list li { grid-template-columns: 1fr; gap: 5px; padding: 16px 0; }
  .method-list span { font-size: 14px; }
  .evidence { padding-bottom: 72px; }
  .evidence-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .evidence-grid article { padding: 18px; }
  .evidence-grid p { font-size: 13px; }
  .faq-layout { gap: 24px; }
  .faq-list summary { padding-block: 18px; font-size: 15px; }
  .faq-list summary::after { top: 16px; }
  .faq-list details p { padding-right: 14px; font-size: 14px; }
  .about-section { padding-block: 68px; }
  .about-grid { gap: 22px; }
  .about-copy p { font-size: 14px; }
  .editorial-section, .privacy-section { padding-block: 68px; }
  .editorial-card, .contact-card { padding: 24px; border-radius: 14px; }
  .editorial-card h2, .contact-card h2, .privacy-heading h2 { font-size: 28px; }
  .privacy-wrap { gap: 30px; }
  .privacy-content { gap: 22px; }
  .site-footer { padding-top: 55px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { display: grid; gap: 10px; margin-top: 38px; }
}

@media (max-width: 390px) {
  .hero h1 { font-size: 36px; }
  .hero-points { gap: 10px; }
  .evidence-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}