:root {
  --ink: #071321;
  --ink-soft: #102238;
  --paper: #f2f5f4;
  --muted: #738293;
  --line: rgba(7, 19, 33, .14);
  --cyan: #60ccff;
  --mint: #77efc3;
  --amber: #ffbe5d;
  --white: #f8fbff;
  --max: 1240px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.6; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
.site-header { position: fixed; z-index: 10; inset: 0 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 24px clamp(20px, 5vw, 72px); color: var(--white); background: linear-gradient(180deg, rgba(7,19,33,.84), rgba(7,19,33,0)); }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--white); font-weight: 650; letter-spacing: .08em; }
.brand-mark { display: inline-block; width: 20px; height: 20px; border: 2px solid var(--cyan); border-radius: 50%; position: relative; }
.brand-mark::after { content: ""; position: absolute; width: 6px; height: 6px; background: var(--mint); border-radius: 50%; top: 5px; left: 5px; }
.nav { display: flex; gap: 30px; font-size: 14px; color: rgba(248,251,255,.78); }
.nav a:hover { color: var(--white); }
.nav-toggle { display: none; color: var(--white); background: transparent; border: 1px solid rgba(255,255,255,.35); padding: 7px 10px; }
.hero { min-height: 780px; display: grid; grid-template-columns: .85fr 1.15fr; align-items: stretch; background: var(--ink); color: var(--white); }
.hero__copy { display: flex; flex-direction: column; justify-content: center; padding: 150px clamp(28px, 7vw, 110px) 100px; position: relative; z-index: 1; }
.eyebrow { color: var(--cyan); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; margin: 0 0 22px; font-weight: 650; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(48px, 5.5vw, 86px); line-height: 1.04; letter-spacing: -.055em; font-weight: 600; margin-bottom: 28px; }
h1 em { color: var(--cyan); font-style: normal; }
.hero__lead { max-width: 440px; color: rgba(248,251,255,.72); font-size: 18px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 18px; }
.button { display: inline-flex; align-items: center; gap: 12px; padding: 13px 19px; font-size: 14px; border: 1px solid transparent; transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button--primary { color: var(--ink); background: var(--cyan); }
.button--quiet { color: var(--white); border-color: rgba(255,255,255,.28); }
.hero__note { color: rgba(248,251,255,.45); font-size: 12px; }
.hero__visual { min-height: 780px; position: relative; overflow: hidden; }
.hero__visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--ink) 0%, rgba(7,19,33,.22) 28%, rgba(7,19,33,0) 70%), linear-gradient(0deg, rgba(7,19,33,.34), transparent 45%); }
.hero__visual img { height: 100%; object-fit: cover; }
.hero__stamp { position: absolute; z-index: 1; right: 7%; bottom: 10%; color: rgba(248,251,255,.76); font-size: 12px; letter-spacing: .14em; line-height: 1.4; }
.hero__stamp strong { color: var(--cyan); font-weight: 500; letter-spacing: .2em; }
.section { max-width: var(--max); margin: 0 auto; padding: 130px 32px; }
.section-heading { max-width: 720px; }
.section-heading h2 { font-size: clamp(36px, 4vw, 58px); line-height: 1.1; letter-spacing: -.05em; font-weight: 600; margin-bottom: 22px; }
.section--intro { padding-bottom: 90px; }
.intro-copy { max-width: 660px; color: var(--muted); font-size: 18px; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 75px; }
.principle { border-top: 1px solid var(--line); padding-top: 22px; }
.principle__index { color: var(--cyan); font-size: 12px; letter-spacing: .14em; }
.principle h3 { font-size: 24px; margin: 22px 0 12px; }
.principle p { color: var(--muted); font-size: 14px; max-width: 300px; }
.section--showcase { max-width: none; background: var(--ink); color: var(--white); padding-left: max(32px, calc((100vw - var(--max)) / 2 + 32px)); padding-right: max(32px, calc((100vw - var(--max)) / 2 + 32px)); }
.section-heading--row { display: flex; align-items: end; justify-content: space-between; gap: 40px; max-width: var(--max); margin: 0 auto 50px; }
.section-heading__aside { color: rgba(248,251,255,.55); max-width: 330px; font-size: 13px; }
.poster-grid { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 14px; }
.poster { min-height: 260px; position: relative; overflow: hidden; background: var(--ink-soft); }
.poster--wide { grid-row: span 2; min-height: 540px; }
.poster img { height: 100%; object-fit: cover; transition: transform .5s; }
.poster:hover img { transform: scale(1.04); }
.poster::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,19,33,.64), transparent 45%); pointer-events: none; }
.poster__meta { position: absolute; z-index: 1; left: 18px; bottom: 15px; font-size: 12px; color: rgba(248,251,255,.8); }
.section--split { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(35px, 8vw, 120px); align-items: center; }
.split-media { overflow: hidden; }
.split-media img { aspect-ratio: 4 / 3; object-fit: cover; }
.split-copy h2 { font-size: clamp(34px, 4vw, 54px); line-height: 1.1; letter-spacing: -.05em; margin-bottom: 24px; }
.split-copy > p { max-width: 470px; color: var(--muted); }
.stats { display: flex; gap: clamp(28px, 5vw, 64px); margin-top: 45px; padding-top: 25px; border-top: 1px solid var(--line); }
.stats dt { font-size: 44px; line-height: 1; color: var(--ink); }
.stats dd { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.section--progress { padding-top: 90px; padding-bottom: 150px; }
.progress-layout { border-top: 1px solid var(--line); margin-top: 40px; }
.progress-card { display: grid; grid-template-columns: 18px 1fr auto; gap: 16px; align-items: start; padding: 25px 0; border-bottom: 1px solid var(--line); }
.status-dot { width: 10px; height: 10px; margin-top: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px rgba(119,239,195,.15); }
.status-dot--muted { background: var(--muted); box-shadow: none; }
.progress-card strong { font-size: 18px; font-weight: 600; }
.progress-card p { color: var(--muted); font-size: 14px; margin: 5px 0 0; }
.progress-card__state { color: var(--muted); font-size: 12px; padding-top: 4px; }
.disclaimer { margin-top: 25px; color: var(--muted); font-size: 12px; }
.site-footer { display: flex; justify-content: space-between; gap: 30px; padding: 46px max(32px, calc((100vw - var(--max)) / 2 + 32px)); background: var(--ink); color: rgba(248,251,255,.62); font-size: 13px; }
.brand--footer { color: var(--white); }
.site-footer p { margin: 15px 0 0; }
.footer-links { display: flex; align-items: end; flex-direction: column; gap: 8px; }
.footer-links a { color: var(--cyan); }
@media (max-width: 840px) {
  .site-header { padding: 20px; }
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 70px; right: 20px; padding: 15px; flex-direction: column; gap: 15px; background: rgba(7,19,33,.94); }
  .nav.is-open { display: flex; }
  .hero { display: block; }
  .hero__copy { min-height: 590px; padding: 150px 24px 50px; }
  .hero__visual { min-height: 420px; }
  .hero__visual::after { background: linear-gradient(0deg, var(--ink), rgba(7,19,33,0) 55%); }
  .section { padding: 85px 22px; }
  .principles, .section--split { grid-template-columns: 1fr; }
  .principles { gap: 38px; margin-top: 48px; }
  .section-heading--row { display: block; }
  .section-heading__aside { margin-top: 20px; }
  .poster-grid { grid-template-columns: 1fr 1fr; }
  .poster--wide { grid-row: auto; min-height: 320px; grid-column: span 2; }
  .poster { min-height: 220px; }
  .site-footer { padding: 38px 22px; display: block; }
  .footer-links { align-items: start; margin-top: 25px; }
}
@media (max-width: 480px) {
  h1 { font-size: 46px; }
  .poster-grid { display: block; }
  .poster { min-height: 240px; margin-bottom: 12px; }
  .poster--wide { min-height: 280px; }
}