:root {
  --o1-bg: #000;
  --o1-elev: #0a0a0a;
  --o1-card: rgba(255, 255, 255, 0.035);
  --o1-line: rgba(255, 255, 255, 0.09);
  --o1-line-2: rgba(255, 255, 255, 0.18);
  --o1-text: #ffffff;
  --o1-muted: #8b8b93;
  --o1-muted-2: #b9b9c0;
  --o1-up: #0ecb81;
  --o1-down: #f6465d;
  --o1-max: 1120px;
  --o1-radius: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--o1-bg);
  color: var(--o1-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(900px 520px at 50% -8%, rgba(255, 255, 255, 0.1), transparent 60%);
  background-attachment: fixed;
}
a { color: #fff; text-decoration: none; }
a:hover { opacity: 0.88; }
img { max-width: 100%; height: auto; display: block; }
.o1-skip {
  position: absolute; left: -9999px; top: auto;
}
.o1-skip:focus {
  left: 16px; top: 16px; z-index: 9999;
  padding: 8px 16px; background: #fff; color: #000; border-radius: 8px;
}
.o1-wrap { width: 100%; max-width: var(--o1-max); margin: 0 auto; padding: 0 24px; }
.o1-wrap--narrow { max-width: 760px; }

.o1-header {
  position: sticky; top: 0; z-index: 300;
  background: rgba(0, 0, 0, 0.76);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--o1-line);
}
.o1-header__inner {
  display: flex; align-items: center; gap: 18px; min-height: 68px;
}
.o1-brand { display: flex; align-items: center; gap: 10px; color: #fff; flex-shrink: 0; }
.o1-brand__logo { width: 32px; height: 32px; border-radius: 8px; object-fit: contain; }
.o1-brand__mark {
  width: 28px; height: 28px; border-radius: 7px; background: #fff;
  box-shadow: inset 0 0 0 7px #000;
}
.o1-brand__text { display: flex; align-items: baseline; gap: 6px; }
.o1-brand__text strong { font-size: 18px; font-weight: 800; letter-spacing: -0.02em; }
.o1-brand__text em { font-style: normal; font-size: 12px; color: var(--o1-muted); font-weight: 700; }
.o1-nav { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; flex-wrap: wrap; }
.o1-nav a {
  padding: 8px 12px; color: var(--o1-muted); font-size: 14px; font-weight: 500; border-radius: 999px;
}
.o1-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }
.o1-header__cta { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.o1-nav-toggle {
  display: none; flex-direction: column; gap: 5px; padding: 8px; margin-left: auto;
  background: none; border: 1px solid var(--o1-line); border-radius: 8px; cursor: pointer;
}
.o1-nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; }

.o1-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 22px; border-radius: 999px;
  font-size: 14.5px; font-weight: 600; border: 1px solid transparent; cursor: pointer;
  transition: background .2s, border-color .2s, transform .15s;
  text-decoration: none; white-space: nowrap;
}
.o1-btn:hover { transform: translateY(-1px); text-decoration: none; opacity: 1; }
.o1-btn--solid { background: #fff; color: #000; }
.o1-btn--solid:hover { background: #f2f2f2; color: #000; }
.o1-btn--ghost { background: rgba(255, 255, 255, 0.06); color: #fff; border-color: var(--o1-line-2); }
.o1-btn--ghost:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }
.o1-btn--sm { height: 36px; padding: 0 16px; font-size: 13px; }
.o1-btn--lg { height: 56px; padding: 0 34px; font-size: 16px; }

.o1-hero { padding: 88px 0 56px; text-align: center; }
.o1-hero--page { padding: 72px 0 32px; }
.o1-hero__inner { max-width: 820px; }
.o1-badge {
  display: inline-flex; margin: 0 0 18px; padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--o1-line-2); color: var(--o1-muted-2); font-size: 13px; font-weight: 600;
}
.o1-hero h1 {
  margin: 0 0 12px; font-size: clamp(40px, 6vw, 64px); line-height: 1.08;
  font-weight: 800; letter-spacing: -1.5px;
}
.o1-lead {
  margin: 0 0 16px; font-size: clamp(22px, 3vw, 32px); font-weight: 700;
  background: linear-gradient(180deg, #fff 30%, rgba(255, 255, 255, 0.42) 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.o1-desc { margin: 0 auto 28px; max-width: 640px; color: var(--o1-muted-2); font-size: 17px; }
.o1-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-bottom: 16px; }
.o1-actions--center { justify-content: center; }
.o1-tip { margin: 0 0 36px; font-size: 13px; color: var(--o1-muted); }
.o1-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 0; text-align: center;
}
.o1-stats dt { font-size: 28px; font-weight: 800; letter-spacing: -0.03em; }
.o1-stats dd { margin: 6px 0 0; color: var(--o1-muted); font-size: 13px; }

.o1-sec { padding: 72px 0; }
.o1-sec--soft { background: linear-gradient(180deg, rgba(255, 255, 255, 0.028), transparent 70%); }
.o1-kicker {
  margin: 0 0 10px; font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--o1-muted);
}
.o1-h2 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.03em; }
.o1-sub { margin: 0 0 32px; max-width: 640px; color: var(--o1-muted-2); }
.o1-sec__row { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.o1-sec__row .o1-h2 { margin: 0; }
.o1-more { color: var(--o1-muted-2); font-size: 14px; font-weight: 600; }

.o1-grid { display: grid; gap: 16px; }
.o1-grid--3 { grid-template-columns: repeat(3, 1fr); }
.o1-grid--2 { grid-template-columns: repeat(2, 1fr); }
.o1-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--o1-line); border-radius: var(--o1-radius); padding: 24px;
}
.o1-card h3, .o1-card h2 { margin: 0 0 10px; font-size: 18px; font-weight: 800; }
.o1-card p { margin: 0; color: var(--o1-muted-2); font-size: 14.5px; }

.o1-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.o1-steps li {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 22px; border-radius: var(--o1-radius); border: 1px solid var(--o1-line);
  background: rgba(255, 255, 255, 0.028);
}
.o1-steps__num {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.07); font-weight: 800; font-size: 13px;
}
.o1-steps h3 { margin: 0 0 6px; font-size: 17px; }
.o1-steps p { margin: 0; color: var(--o1-muted-2); font-size: 14.5px; }

.o1-table-wrap { overflow-x: auto; border: 1px solid var(--o1-line); border-radius: var(--o1-radius); }
.o1-table { width: 100%; border-collapse: collapse; }
.o1-table th, .o1-table td {
  text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--o1-line); font-size: 14px;
}
.o1-table th { color: var(--o1-muted); font-weight: 600; background: rgba(255, 255, 255, 0.03); }
.o1-table tr:last-child td { border-bottom: 0; }
.o1-table a { color: #fff; text-decoration: underline; }

.o1-cta { padding: 24px 0 72px; }
.o1-cta__box {
  border-radius: 28px; padding: 64px 40px; text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.02));
}
.o1-cta__box h2 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 36px); font-weight: 800; }
.o1-cta__box > p { margin: 0 auto 28px; max-width: 560px; color: var(--o1-muted-2); }

.o1-faq details {
  border: 1px solid var(--o1-line); border-radius: 14px; padding: 0 18px;
  background: rgba(255, 255, 255, 0.028); margin-bottom: 10px;
}
.o1-faq summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style: none; }
.o1-faq summary::-webkit-details-marker { display: none; }
.o1-faq details p { margin: 0 0 16px; color: var(--o1-muted-2); font-size: 14.5px; }

.o1-news { display: grid; gap: 10px; }
.o1-news__link {
  display: grid; grid-template-columns: 100px 1fr; gap: 16px; align-items: start;
  padding: 16px 18px; border: 1px solid var(--o1-line); border-radius: 14px;
  background: rgba(255, 255, 255, 0.028);
}
.o1-news__link:hover { background: rgba(255, 255, 255, 0.05); opacity: 1; }
.o1-news time { color: var(--o1-muted); font-size: 13px; font-weight: 600; }
.o1-news h3 { margin: 0 0 6px; font-size: 16px; font-weight: 700; color: #fff; }
.o1-news p { margin: 0; color: var(--o1-muted); font-size: 13.5px; }

.o1-split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.o1-meta, .o1-points, .o1-install { list-style: none; margin: 0; padding: 0; }
.o1-meta li, .o1-points li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 0; border-bottom: 1px solid var(--o1-line); color: var(--o1-muted-2); font-size: 14px;
}
.o1-meta strong, .o1-points li { color: #fff; }
.o1-points { margin-top: 8px; }
.o1-points li { display: block; }
.o1-install li { padding: 12px 0; border-bottom: 1px solid var(--o1-line); }
.o1-install strong { display: block; margin-bottom: 6px; }
.o1-install span { color: var(--o1-muted-2); font-size: 14px; }

.o1-footer { border-top: 1px solid var(--o1-line); padding: 48px 0 28px; }
.o1-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 28px; }
.o1-footer__brand p { margin: 14px 0 0; color: var(--o1-muted); font-size: 13.5px; max-width: 320px; }
.o1-footer__col h3 { margin: 0 0 12px; font-size: 13px; color: var(--o1-muted); font-weight: 700; }
.o1-footer__col a { display: block; margin: 0 0 8px; color: var(--o1-muted-2); font-size: 14px; }
.o1-footer__col a:hover { color: #fff; }
.o1-footer__risk { margin: 0 0 20px; color: var(--o1-muted); font-size: 12px; line-height: 1.7; }
.o1-footer__bottom { border-top: 1px solid var(--o1-line); padding-top: 18px; text-align: center; }
.o1-footer__copy, .o1-footer__meta { margin: 0 0 8px; font-size: 12px; color: var(--o1-muted); }
.o1-footer__copy a { color: var(--o1-muted-2); }

.o1-page { padding: 40px 0 72px; }
.o1-breadcrumb { margin: 0 0 20px; font-size: 13px; color: var(--o1-muted); }
.o1-breadcrumb a { color: var(--o1-muted-2); }
.o1-article {
  border: 1px solid var(--o1-line); border-radius: 20px; padding: 28px 24px 32px;
  background: rgba(255, 255, 255, 0.028);
}
.o1-article h1 { margin: 0 0 12px; font-size: clamp(26px, 4vw, 36px); font-weight: 800; }
.o1-article__meta { color: var(--o1-muted); font-size: 13px; margin-bottom: 18px; }
.o1-prose { color: var(--o1-muted-2); font-size: 15.5px; line-height: 1.8; }
.o1-prose h2, .o1-prose h3 { color: #fff; }
.o1-prose img { border-radius: 12px; margin: 16px 0; }
.o1-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.o1-list__card {
  border: 1px solid var(--o1-line); border-radius: 16px; overflow: hidden;
  background: rgba(255, 255, 255, 0.028);
}
.o1-list__card img { width: 100%; height: 160px; object-fit: cover; }
.o1-list__card .body { padding: 14px 16px 18px; }
.o1-list__card h2 { margin: 0 0 8px; font-size: 16px; }
.o1-list__card p { margin: 0; color: var(--o1-muted); font-size: 13px; }
.o1-empty { text-align: center; padding: 80px 20px; }
.o1-empty h1 { font-size: 56px; margin: 0 0 12px; }

@media (max-width: 960px) {
  .o1-grid--3, .o1-stats, .o1-footer__grid, .o1-list { grid-template-columns: 1fr 1fr; }
  .o1-header__cta .o1-btn--ghost { display: none; }
}
@media (max-width: 720px) {
  .o1-nav-toggle { display: flex; }
  .o1-nav {
    display: none; position: absolute; left: 0; right: 0; top: 68px;
    flex-direction: column; align-items: stretch;
    background: #000; border-bottom: 1px solid var(--o1-line); padding: 12px 16px 20px;
  }
  .o1-nav.is-open { display: flex; }
  .o1-header__inner { position: relative; }
  .o1-header__cta { display: none; }
  .o1-grid--3, .o1-grid--2, .o1-stats, .o1-split, .o1-footer__grid, .o1-list, .o1-news__link {
    grid-template-columns: 1fr;
  }
  .o1-hero { padding: 56px 0 40px; }
  .o1-cta__box { padding: 40px 20px; }
  .o1-btn--lg { width: 100%; }
}