:root {
  --paper: #f4f0e6;
  --paper-deep: #ebe5d7;
  --ink: #152b2c;
  --ink-soft: #365052;
  --jade: #315f57;
  --jade-dark: #183d3b;
  --jade-light: #dce6df;
  --gold: #a68b52;
  --line: rgba(21, 43, 44, 0.16);
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--gold); outline-offset: 4px; }
.skip-link { position: fixed; top: -60px; left: 16px; z-index: 100; padding: 10px 16px; background: white; }
.skip-link:focus { top: 12px; }

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 50%;
  width: min(1180px, calc(100% - 64px));
  height: 94px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 48px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--serif); font-size: 23px; font-weight: 700; letter-spacing: .12em; }
.brand-seal { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; color: var(--paper); background: var(--ink); font-family: var(--serif); font-size: 19px; letter-spacing: 0; }
.site-header nav { display: flex; gap: 38px; margin-left: auto; color: var(--ink-soft); font-size: 14px; }
.site-header nav a { position: relative; padding: 12px 0; }
.site-header nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 5px; height: 1px; background: var(--gold); transition: right .25s ease; }
.site-header nav a:hover::after { right: 0; }
.nav-cta { padding: 11px 20px; border: 1px solid var(--ink); font-size: 13px; letter-spacing: .08em; transition: .2s ease; }
.nav-cta:hover { color: var(--paper); background: var(--ink); }

.hero {
  position: relative;
  min-height: 830px;
  overflow: hidden;
  padding: 200px max(32px, calc((100vw - 1180px) / 2)) 100px;
  display: grid;
  grid-template-columns: 1fr 0.88fr;
  align-items: center;
  gap: 72px;
}
.hero::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
  background:
    radial-gradient(circle at 70% 38%, rgba(255,255,255,.76), transparent 28%),
    linear-gradient(90deg, rgba(244,240,230,.9) 0 28%, rgba(244,240,230,.7) 52%, rgba(244,240,230,.28) 100%);
}
.hero-wash {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 56%;
  opacity: .36;
  mix-blend-mode: multiply;
  filter: saturate(.8) contrast(.92);
}
.hero-copy, .product-preview { position: relative; z-index: 2; }
.eyebrow { margin: 0 0 24px; display: flex; align-items: center; gap: 12px; color: var(--gold); font-size: 12px; font-weight: 600; letter-spacing: .24em; }
.eyebrow span { width: 34px; height: 1px; background: currentColor; }
h1, h2 { margin: 0; font-family: var(--serif); font-weight: 600; letter-spacing: .05em; }
h1 { font-size: clamp(52px, 5.7vw, 82px); line-height: 1.16; }
.lede { max-width: 560px; margin: 30px 0 0; color: var(--ink-soft); font-family: var(--serif); font-size: 20px; line-height: 1.9; }
.hero-actions { display: flex; gap: 14px; margin-top: 42px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 25px; border: 1px solid var(--ink); font-size: 14px; letter-spacing: .08em; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--paper); background: var(--ink); box-shadow: 0 12px 30px rgba(21,43,44,.17); }
.button-primary:hover { background: var(--jade); }
.button-secondary { background: rgba(244,240,230,.44); }
.microcopy { margin: 13px 0 0 6px; color: #78786f; font-size: 12px; }

.product-preview { min-height: 520px; display: grid; place-items: center; }
.preview-orbit { position: absolute; border: 1px solid rgba(49,95,87,.2); border-radius: 50%; }
.orbit-one { width: 480px; height: 480px; transform: rotate(12deg); }
.orbit-two { width: 390px; height: 560px; transform: rotate(42deg); border-color: rgba(166,139,82,.22); }
.phone { position: relative; width: 290px; min-height: 575px; padding: 20px 20px 15px; overflow: hidden; border: 7px solid #183132; border-radius: 42px; color: var(--ink); background: rgba(249,247,240,.93); box-shadow: 0 35px 70px rgba(25,48,45,.24), inset 0 0 0 1px rgba(255,255,255,.9); transform: rotate(2.2deg); }
.phone::before { content: ""; position: absolute; inset: 160px -100px auto; height: 300px; background: radial-gradient(circle, rgba(103,146,124,.2), transparent 65%); }
.phone-top { display: flex; justify-content: space-between; align-items: center; padding: 0 4px; font-size: 9px; }
.phone-top i { position: absolute; left: 50%; top: 13px; width: 73px; height: 18px; border-radius: 10px; background: var(--ink); transform: translateX(-50%); }
.phone-top b { width: 25px; height: 7px; border-top: 2px solid var(--ink); border-right: 5px solid var(--ink); }
.phone-head { margin-top: 28px; text-align: center; font-family: var(--serif); }
.phone-head span { display: block; font-size: 13px; letter-spacing: .12em; }
.phone-head small { display: block; margin-top: 6px; color: #7a7b72; font-size: 9px; }
.solar-term { display: flex; align-items: center; gap: 12px; margin: 23px 2px 0; padding: 12px 13px; border: 1px solid rgba(49,95,87,.18); background: rgba(220,230,223,.4); }
.solar-term > span { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: var(--paper); background: var(--jade); font-family: var(--serif); font-size: 12px; }
.solar-term b, .solar-term small { display: block; }
.solar-term b { font-family: var(--serif); font-size: 12px; }
.solar-term small { margin-top: 4px; color: #6c756f; font-size: 8px; }
.date-ring { position: relative; width: 205px; height: 205px; margin: 20px auto 0; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid rgba(49,95,87,.28); border-radius: 50%; box-shadow: inset 0 0 0 15px rgba(220,230,223,.34), inset 0 0 0 16px rgba(49,95,87,.12); }
.date-ring::before, .date-ring::after { content: ""; position: absolute; border-radius: 50%; border: 1px dashed rgba(166,139,82,.32); }
.date-ring::before { inset: 27px; }
.date-ring::after { inset: 44px; }
.date-ring strong { position: relative; z-index: 1; font-family: var(--serif); font-size: 53px; font-weight: 500; }
.date-ring small { position: relative; z-index: 1; color: var(--jade); font-size: 10px; letter-spacing: .12em; }
.ring-label { position: absolute; color: var(--gold); font-family: var(--serif); font-size: 10px; }
.ring-label.top { top: 7px; }.ring-label.right { right: 8px; }.ring-label.bottom { bottom: 7px; }.ring-label.left { left: 8px; }
.daily-note { position: relative; margin-top: 18px; padding: 12px 13px; border-left: 2px solid var(--gold); background: rgba(235,229,215,.7); }
.daily-note span { font-family: var(--serif); font-size: 11px; }
.daily-note p { margin: 4px 0 0; color: #6c716b; font-size: 8px; }
.phone-tabs { display: flex; justify-content: space-around; margin-top: 19px; padding-top: 12px; border-top: 1px solid var(--line); color: #929289; font-family: var(--serif); font-size: 11px; }
.phone-tabs .active { color: var(--jade); }
.preview-caption { position: absolute; bottom: -28px; color: #757a74; font-size: 11px; letter-spacing: .08em; }

.section { padding: 120px max(32px, calc((100vw - 1180px) / 2)); }
.section h2 { font-size: clamp(38px, 4.2vw, 58px); line-height: 1.26; }
.section-intro { display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px 100px; align-items: end; }
.section-intro .eyebrow { grid-column: 1 / -1; margin-bottom: 0; }
.section-intro > p:last-child { margin: 0 0 8px; color: var(--ink-soft); font-family: var(--serif); font-size: 18px; line-height: 1.8; }
.feature-list { margin-top: 80px; display: grid; grid-template-columns: 1fr 1fr; column-gap: 90px; }
.feature-list article { display: grid; grid-template-columns: 68px 1fr; gap: 24px; padding: 32px 0; border-top: 1px solid var(--line); }
.feature-list article:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
.feature-mark { display: grid; place-items: center; width: 60px; height: 60px; border-radius: 50%; background: var(--jade-light); }
.feature-mark svg { width: 31px; height: 31px; fill: none; stroke: var(--jade); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.feature-list h3 { margin: 4px 0 9px; font-family: var(--serif); font-size: 22px; font-weight: 600; letter-spacing: .08em; }
.feature-list p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }

.trust { min-height: 560px; display: grid; grid-template-columns: 1fr .85fr; align-items: center; gap: 80px; color: #e9eee7; background: var(--jade-dark); overflow: hidden; }
.trust-copy { max-width: 610px; }
.trust-copy .light { color: #c2ad74; }
.trust-copy p:not(.eyebrow) { margin: 28px 0 30px; color: rgba(233,238,231,.77); font-family: var(--serif); font-size: 18px; line-height: 2; }
.trust-copy a { display: inline-flex; gap: 14px; align-items: center; color: #d9c696; font-size: 14px; }
.trust-copy a span { transition: transform .2s ease; }.trust-copy a:hover span { transform: translateX(5px); }
.trust-symbol { position: relative; min-height: 330px; }
.moon { position: absolute; top: 3%; right: 20%; width: 190px; height: 190px; border-radius: 50%; background: radial-gradient(circle at 45% 42%, #ece5cf 0 28%, #d2c59f 62%, rgba(210,197,159,.4)); box-shadow: 0 0 70px rgba(231,216,169,.2); }
.mountains { position: absolute; left: 0; right: -25%; bottom: 0; height: 200px; clip-path: polygon(0 91%, 15% 58%, 25% 72%, 42% 27%, 58% 68%, 73% 41%, 100% 88%, 100% 100%, 0 100%); }
.mountain-back { background: rgba(106,141,124,.4); transform: translateY(-28px); }
.mountain-front { background: #102f2f; filter: drop-shadow(0 -10px 24px rgba(9,30,30,.32)); }
.trust-symbol > span { position: absolute; right: 15%; bottom: 6%; z-index: 2; padding: 8px 7px 7px 9px; border: 1px solid rgba(213,193,141,.55); color: #d5c18d; font-family: var(--serif); font-size: 14px; letter-spacing: .2em; }

.about { display: grid; grid-template-columns: 1fr 1.1fr auto; align-items: end; gap: 70px; }
.about .eyebrow { margin-bottom: 18px; }
.about > p { margin: 0 0 4px; color: var(--ink-soft); font-family: var(--serif); font-size: 18px; line-height: 1.9; }
footer { min-height: 160px; padding: 45px max(32px, calc((100vw - 1180px) / 2)); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; border-top: 1px solid var(--line); color: #64706a; font-size: 12px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-family: var(--serif); font-size: 18px; }
.footer-brand .brand-seal { width: 31px; height: 31px; font-size: 15px; }
.footer-links { display: flex; gap: 25px; }
footer p { grid-column: 1 / -1; margin: 0; }
footer a:hover { color: var(--jade); }

.legal-shell { min-height: calc(100vh - 160px); padding: 150px max(24px, calc((100vw - 820px) / 2)) 90px; }
.legal-shell .eyebrow { margin-bottom: 18px; }
.legal-shell h1 { font-size: clamp(40px, 6vw, 62px); }
.legal-meta { margin: 16px 0 44px; color: #70776f; font-size: 13px; }
.legal-body { padding-top: 10px; border-top: 1px solid var(--line); }
.legal-body h2 { margin: 42px 0 14px; font-size: 24px; }
.legal-body h3 { margin: 28px 0 10px; font-size: 18px; }
.legal-body p, .legal-body li { color: var(--ink-soft); font-size: 15px; line-height: 1.95; }
.legal-body ul { padding-left: 1.35em; }
.legal-body a { color: var(--jade); border-bottom: 1px solid rgba(49,95,87,.3); }
.legal-note { margin-top: 34px; padding: 20px 24px; border-left: 3px solid var(--gold); background: var(--paper-deep); }
.legal-summary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 0 0 40px; }
.legal-summary article { padding: 18px 20px; border: 1px solid var(--line); background: rgba(255, 255, 255, .32); }
.legal-summary h2 { margin: 0 0 6px; font-size: 17px; }
.legal-summary p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }
@media (max-width: 520px) { .legal-summary { grid-template-columns: 1fr; } }

@media (max-width: 900px) {
  .site-header { width: calc(100% - 40px); height: 78px; gap: 16px; }
  .site-header nav { display: none; }
  .nav-cta { margin-left: auto; }
  .hero { min-height: auto; padding: 145px 24px 100px; grid-template-columns: 1fr; gap: 78px; }
  .hero::before { background: linear-gradient(var(--paper) 0 52%, rgba(244,240,230,.76) 72%, rgba(244,240,230,.38)); }
  .hero-wash { inset: 0; width: 100%; height: 100%; object-position: 64% center; opacity: .3; }
  .hero-copy { text-align: center; }
  .eyebrow { justify-content: center; }
  .lede { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .microcopy { text-align: center; }
  .section { padding: 88px 24px; }
  .section-intro { grid-template-columns: 1fr; text-align: center; }
  .feature-list { margin-top: 56px; grid-template-columns: 1fr; }
  .feature-list article:nth-last-child(-n+2) { border-bottom: 0; }
  .feature-list article:last-child { border-bottom: 1px solid var(--line); }
  .trust { grid-template-columns: 1fr; text-align: center; }
  .trust-copy { margin: auto; }
  .trust-symbol { min-height: 280px; }
  .about { grid-template-columns: 1fr; gap: 30px; text-align: center; }
  .about .button { justify-self: center; }
  footer { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  footer p { grid-column: 1; }
}

@media (max-width: 520px) {
  .brand { font-size: 19px; }
  .brand-seal { width: 34px; height: 34px; }
  .nav-cta { padding: 9px 12px; font-size: 12px; }
  h1 { font-size: 44px; }
  .lede { font-size: 17px; line-height: 1.8; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 300px; margin-left: auto; margin-right: auto; }
  .product-preview { min-height: 500px; transform: scale(.88); margin: -35px -20px -40px; }
  .phone { width: 280px; }
  .feature-list article { grid-template-columns: 56px 1fr; gap: 18px; text-align: left; }
  .feature-mark { width: 52px; height: 52px; }
  .feature-mark svg { width: 27px; height: 27px; }
  .trust-symbol { min-height: 230px; }
  .moon { width: 150px; height: 150px; }
  .footer-links { gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}

/* ── 知识库 /wiki ─────────────────────────────────────────────────── */
.wiki-crumb { margin-bottom: 14px; font-size: 13px; color: #70776f; letter-spacing: .04em; }
.wiki-crumb a { color: var(--jade); }
.wiki-crumb span[aria-hidden] { margin: 0 6px; opacity: .5; }
.wiki-page h1, .wiki-hub h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.25; }
.wiki-lede { margin: 18px 0 0; max-width: 46em; color: var(--ink-soft); font-size: 17px; line-height: 1.9; }
.wiki-hub .wiki-lede { font-size: 18px; }

.wiki-siblings { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0 38px; }
.wiki-siblings a {
  padding: 7px 15px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 13px; color: var(--ink-soft); background: rgba(255,255,255,.4);
}
.wiki-siblings a:hover { border-color: var(--jade); color: var(--jade); }
.wiki-siblings a.current { background: var(--jade); border-color: var(--jade); color: #fff; }

/* 口径表: 术语在左, 说明在右; 窄屏堆叠 */
.spec { margin: 20px 0; border-top: 1px solid var(--line); }
.spec-row { display: grid; grid-template-columns: 8.5em 1fr; gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.spec dt { color: var(--ink); font-size: 14px; font-weight: 600; }
.spec dd { margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.9; }

.table-wrap { overflow-x: auto; margin: 20px 0; }
.legal-body table { width: 100%; border-collapse: collapse; font-size: 14px; }
.legal-body th, .legal-body td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); }
.legal-body th { color: var(--ink); font-weight: 600; background: var(--paper-deep); }
.legal-body td { color: var(--ink-soft); }
.legal-body code {
  padding: 1px 6px; border-radius: 4px; background: var(--paper-deep);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em;
}

.wiki-disclaimer { margin-top: 46px; padding-top: 18px; border-top: 1px solid var(--line); }
.wiki-disclaimer p { color: #70776f; font-size: 13px; line-height: 1.85; }

.wiki-pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 40px; }
.wiki-pager a { color: var(--jade); font-size: 14px; }
.wiki-pager .pager-next { margin-left: auto; }

/* 索引页 */
.wiki-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 22px; margin-top: 46px; }
.wiki-group { padding: 26px 26px 12px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.45); }
.wiki-group h2 { margin: 0 0 8px; font-size: 20px; }
.wiki-group > p { margin: 0 0 16px; color: #70776f; font-size: 13.5px; line-height: 1.8; }
.wiki-group ul { list-style: none; margin: 0; padding: 0; }
.wiki-group li { border-top: 1px solid var(--line); }
.wiki-group li a { display: block; padding: 13px 0; }
.wiki-group li a strong { display: block; color: var(--ink); font-size: 15px; font-weight: 600; }
.wiki-group li a span { display: block; margin-top: 3px; color: #70776f; font-size: 12.5px; }
.wiki-group li a:hover strong { color: var(--jade); }

@media (max-width: 720px) {
  .spec-row { grid-template-columns: 1fr; gap: 4px; }
  .wiki-pager { flex-direction: column; }
  .wiki-pager .pager-next { margin-left: 0; }
}

/* 知识库: 插图与参考文献 */
.wiki-fig { margin: 30px 0; padding: 0; text-align: center; }
.wiki-fig img { max-width: 100%; height: auto; }
.wiki-fig figcaption { margin-top: 12px; color: #70776f; font-size: 13px; line-height: 1.8; }
.wiki-refs { margin: 20px 0 0; padding-left: 1.6em; }
.wiki-refs li { margin-bottom: 14px; color: var(--ink-soft); font-size: 14.5px; line-height: 1.85; }
.wiki-refs cite { font-style: normal; font-weight: 600; color: var(--ink); }
.ref-meta { display: block; color: #70776f; font-size: 13px; }
.ref-note { display: block; margin-top: 3px; color: #70776f; font-size: 13px; }
.wiki-fanli-link { margin-top: 26px; }
.wiki-fanli-link a { color: var(--jade); font-size: 14.5px; border-bottom: 1px solid rgba(49,95,87,.3); }

/* 知识库: 术语表 */
.term-tools { display: flex; align-items: center; gap: 16px; margin: 30px 0 8px; flex-wrap: wrap; }
#term-filter {
  flex: 1 1 320px; min-width: 0; padding: 11px 16px;
  border: 1px solid var(--line); border-radius: 999px;
  background: rgba(255,255,255,.6); color: var(--ink);
  font-size: 14.5px; font-family: inherit; -webkit-appearance: none;
}
#term-filter:focus { outline: none; border-color: var(--jade); background: #fff; }
.term-count { margin: 0; color: #70776f; font-size: 13px; white-space: nowrap; }

.term-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 34px; }
.term-nav a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 13px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 12.5px; color: var(--ink-soft); background: rgba(255,255,255,.4);
}
.term-nav a:hover { border-color: var(--jade); color: var(--jade); }
.term-nav a span { color: #98a09a; font-size: 11px; }

.term-group { margin-bottom: 8px; }
.term-body .term-group h2 { margin: 40px 0 6px; font-size: 21px; }
.terms { margin: 0; }
.terms dt {
  margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line);
  color: var(--ink); font-size: 16.5px; font-weight: 600;
  font-family: var(--serif); scroll-margin-top: 110px;
}
.terms dd { margin: 6px 0 0; }
.terms dd p { margin: 5px 0; }
.term-how, .term-note { font-size: 14px; }
.term-how span, .term-note span {
  display: inline-block; margin-right: 8px; padding: 1px 7px;
  border-radius: 4px; font-size: 11.5px; vertical-align: 1px;
}
.term-how span { background: var(--jade-light); color: var(--jade); }
.term-note span { background: var(--paper-deep); color: var(--gold); }
.term-empty { margin: 40px 0; color: #70776f; }