/* ============ 着陆页 · 摊在海图桌上的航向报告 ============ */
html { scroll-behavior: smooth; scroll-padding-top: 72px; }

html:has(.landing) { height: auto; }
.landing {
  overflow-x: clip;
  height: auto;
  min-height: 100%;
  font-size: 15px;
}
.landing main { position: relative; z-index: 1; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* ---- 顶栏：墨青条，像海图图廓 ---- */
.lnav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(13, 43, 51, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(216, 188, 116, 0.28);
}
.lnav__inner {
  max-width: 1180px; margin: 0 auto; padding: 12px 32px;
  display: flex; align-items: center; gap: 22px;
}
.lnav__brand { display: flex; align-items: center; gap: 10px; color: var(--dial-text-hi); }
.lnav__brand img { width: 30px; height: 30px; border-radius: 7px; flex: none; }
.lnav__brand .en { font-family: var(--font-serif); font-size: 16px; font-weight: 700; letter-spacing: 0.04em; }
.lnav__brand .cn { font-family: var(--font-serif); font-size: 12px; letter-spacing: 0.22em; color: var(--brass-300); }
.lnav__links { margin-left: auto; display: flex; gap: 2px; }
.lnav__links a {
  padding: 6px 12px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--dial-text-mid);
}
.lnav__links a:hover { color: var(--dial-text-hi); background: rgba(233, 226, 207, 0.08); }
.lnav__links a.is-on { color: var(--teal-950); background: var(--brass-300); }

.lbtn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.lbtn--primary {
  background: var(--brass-500); color: var(--teal-950);
  border: 1px solid var(--brass-700);
}
.lbtn--primary:hover { background: var(--brass-400); }
.lbtn--ghost {
  border: 1px solid rgba(216, 188, 116, 0.38); color: var(--dial-text-hi);
}
.lbtn--ghost:hover { border-color: var(--brass-300); color: var(--brass-200); }
.lbtn--sm { padding: 7px 14px; font-size: 12.5px; }
.lbtn--lg { padding: 12px 22px; font-size: 14px; letter-spacing: 0.06em; }

/* ---- Hero：海图底 + 黄铜罗盘 ---- */
.hero {
  position: relative;
  background: var(--teal-900);
  color: var(--dial-text-hi);
  padding: 36px 0 0;
  overflow: hidden;
}
.hero__grid-bg {
  pointer-events: none;
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 78% 42%, rgba(26, 70, 82, 0.95), transparent 52%),
    radial-gradient(ellipse at 8% 0%, rgba(26, 70, 82, 0.7), transparent 42%),
    repeating-linear-gradient(0deg, rgba(216, 188, 116, 0.045) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(90deg, rgba(216, 188, 116, 0.045) 0 1px, transparent 1px 56px);
}
.hero__grid-bg::before,
.hero__grid-bg::after {
  content: "";
  position: absolute;
  width: 42%; height: 70%;
  border: 1px solid rgba(216, 188, 116, 0.08);
  pointer-events: none;
}
.hero__grid-bg::before { left: -8%; top: -18%; transform: rotate(28deg); }
.hero__grid-bg::after { right: -6%; bottom: -22%; transform: rotate(-18deg); }

.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 28px 48px;
  align-items: center;
  min-height: calc(100vh - 220px);
  padding: 28px 32px 20px;
}
.hero__meta {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.16em;
  color: var(--brass-300); text-transform: uppercase;
}
.hero__meta-rule {
  width: 36px; height: 1px; background: rgba(216, 188, 116, 0.45);
}
.hero__quote {
  margin-top: 22px;
  font-family: var(--font-serif);
  font-size: 15px; letter-spacing: 0.08em;
  color: var(--brass-300); line-height: 1.7;
}
.hero__title {
  margin-top: 14px;
  font-family: var(--font-serif);
  font-size: clamp(36px, 5.2vw, 64px);
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.18;
}
.hero__sub {
  margin-top: 20px; max-width: 38em;
  font-size: 15px; line-height: 1.85; color: var(--dial-text-mid);
}
.hero__cta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }

.hero__dial {
  display: flex; justify-content: center; align-items: center;
  padding: 8px 0 16px;
}
.ldial {
  position: relative;
  width: min(100%, 460px);
  aspect-ratio: 1;
}
.ldial__svg { width: 100%; height: 100%; overflow: visible; }
.ldial__n {
  font-family: var(--font-serif);
  font-size: 18px; font-weight: 700;
  fill: var(--brass-300); letter-spacing: 0.12em;
}
.ldial__needle { transform-origin: 0 0; }
.ldial__needle.is-dim { opacity: 0.28; }
.ldial__needle.is-on { opacity: 1; }
.ldial__badges {
  position: absolute; inset: -2%;
  pointer-events: none;
}
.ldial__badge {
  position: absolute;
  width: 24px; height: 24px;
  margin: -12px 0 0 -12px;
  border-radius: 50%;
  border: 1px solid var(--brass-300);
  background: var(--teal-950);
  color: var(--brass-200);
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  cursor: default;
  pointer-events: auto;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.ldial__badge.is-on,
.ldial__badge:hover {
  background: var(--brass-300);
  color: var(--teal-950);
  border-color: var(--brass-200);
}

.hero__strip {
  position: relative;
  margin-top: 8px;
  border-top: 1px solid rgba(216, 188, 116, 0.28);
  background: rgba(10, 36, 43, 0.45);
}
.hero__stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
}
.hero-stat {
  padding: 22px 8px 24px;
  text-align: center;
}
.hero-stat + .hero-stat { border-left: 1px solid rgba(216, 188, 116, 0.18); }
.hero-stat__n {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: 32px; font-weight: 700; color: var(--brass-300);
  letter-spacing: -0.03em;
}
.hero-stat__n small {
  font-size: 14px; font-weight: 400; margin-left: 3px; color: var(--dial-text-mid);
}
.hero-stat__lbl {
  margin-top: 6px; font-size: 12px; color: var(--dial-text-mid); letter-spacing: 0.04em;
}

/* ---- 通用章节 ---- */
.sect { padding: 88px 0 8px; }
.sect__kicker {
  font-size: 11px; letter-spacing: 0.28em; color: var(--brass-700); font-weight: 700;
}
.sect__title {
  margin-top: 10px;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 40px);
  letter-spacing: 0.16em;
  font-weight: 700;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink-700);
}
.sect__sub {
  margin-top: 14px; font-size: 15px; color: var(--ink-600); max-width: 42em; line-height: 1.8;
}
.sect__kicker--on-teal { color: var(--brass-300); }
.sect__title--on-teal {
  color: var(--dial-text-hi);
  border-bottom-color: rgba(216, 188, 116, 0.28);
}
.sect__sub--on-teal { color: var(--dial-text-mid); }

/* ---- 一利五率 指针带 ---- */
.needles {
  padding: 40px 0 0;
  background: var(--paper-100);
}
.needles__head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 18px;
}
.needles__head .sect__title { border-bottom: 0; padding-bottom: 0; }
.needles__note {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-400); letter-spacing: 0.06em; padding-bottom: 4px;
}
.meridian {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  margin: 24px 0 0;
  border-top: 1px solid var(--ink-700);
  border-bottom: 1px solid var(--ink-700);
  background: var(--paper-50);
}
.meridian__item {
  display: flex; flex-direction: column; gap: 5px;
  padding: 18px 16px 16px;
  outline: none;
  cursor: default;
  transition: background 0.15s;
}
.meridian__item + .meridian__item { border-left: 1px solid var(--paper-line); }
.meridian__item.is-on,
.meridian__item:hover,
.meridian__item:focus-visible { background: #fffdf6; }
.meridian__no {
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-400);
}
.meridian__kind {
  font-size: 10px; letter-spacing: 0.22em; color: var(--brass-700); font-weight: 700;
}
.meridian__name { font-size: 14px; font-weight: 700; letter-spacing: 0.04em; }
.meridian__rate {
  margin-top: 8px; font-size: 20px; color: var(--teal-800); letter-spacing: -0.03em;
}
.meridian__item--gap .meridian__rate { color: var(--ochre-500); }

/* ---- 痛点：航海日志 ---- */
.log { margin: 36px 0 8px; }
.log__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 8px 28px;
  padding: 26px 4px;
  border-top: 1px solid var(--paper-line);
}
.log__row:last-child { border-bottom: 1px solid var(--ink-700); }
.log__no {
  font-family: var(--font-serif);
  font-size: 36px; font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brass-500);
  line-height: 1;
  padding-top: 2px;
}
.log__name {
  font-family: var(--font-serif);
  font-size: 22px; letter-spacing: 0.12em; font-weight: 700;
}
.log__txt {
  margin-top: 8px; font-size: 14.5px; line-height: 1.8; color: var(--ink-600); max-width: 46em;
}

/* ---- 模块：两张主卡 + 四张舱段 ---- */
.mods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 32px 0 12px;
}
.mod {
  position: relative;
  display: flex; flex-direction: column;
  min-height: 200px;
  padding: 24px 26px 22px;
  background: var(--paper-50);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-panel);
  color: inherit;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}
.mod:hover { border-color: var(--brass-700); transform: translateY(-2px); }
.mod--lg {
  min-height: 248px;
  background:
    radial-gradient(ellipse at 108% -20%, rgba(18, 56, 66, 0.1), transparent 46%),
    var(--paper-50);
  padding: 28px 28px 24px;
}
.mod__idx {
  position: absolute; right: 16px; top: 10px;
  font-family: var(--font-serif);
  font-size: 56px; font-weight: 700;
  color: rgba(176, 141, 62, 0.16);
  line-height: 1; letter-spacing: 0;
}
.mod__role {
  font-size: 11px; letter-spacing: 0.28em; color: var(--brass-700); font-weight: 700;
}
.mod__name {
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 24px; letter-spacing: 0.12em; font-weight: 700;
}
.mod--lg .mod__name { font-size: 30px; }
.mod__txt {
  margin-top: 10px; font-size: 13.5px; line-height: 1.75; color: var(--ink-600);
  max-width: 36em; flex: 1;
}
.mod__go {
  margin-top: 16px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--brass-700);
}
.mod__go::after { content: " →"; }
.mod:hover .mod__go { color: var(--brass-800); }

/* ---- AI：墨青仪器带 ---- */
.sect--ai {
  margin-top: 80px;
  padding: 80px 0 72px;
  background:
    radial-gradient(ellipse at 12% 0%, var(--teal-800), transparent 46%),
    var(--teal-900);
  color: var(--dial-text-hi);
  border-top: 1px solid var(--brass-700);
  border-bottom: 1px solid var(--brass-700);
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 56px;
  margin-top: 28px;
}
.ai-cell {
  padding: 28px 8px 24px 0;
  border-bottom: 1px solid rgba(216, 188, 116, 0.12);
}
.ai-cell__no {
  font-family: var(--font-serif);
  font-size: 13px; letter-spacing: 0.32em; color: var(--brass-300);
}
.ai-cell__name {
  margin-top: 12px;
  font-family: var(--font-serif);
  font-size: 24px; letter-spacing: 0.1em;
}
.ai-cell__txt {
  margin-top: 10px; font-size: 14.5px; line-height: 1.8; color: var(--dial-text-mid); max-width: 36em;
}

/* ---- 合规：海事通告 ---- */
.notice {
  margin: 12px 0 8px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.notice__item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 8px;
  border-bottom: 1px solid var(--paper-line);
}
.notice__mark {
  font-family: var(--font-serif);
  font-size: 18px; letter-spacing: 0.08em;
  color: var(--ochre-500); padding-top: 1px;
}
.notice__item p { font-size: 15px; line-height: 1.75; color: var(--ink-700); }

/* ---- 收束：静物图版 ---- */
.close { padding: 80px 0 8px; }
.close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  align-items: center;
}
.close__plate { margin: 0; }
.close__plate img {
  width: 100%; height: auto; display: block;
  border: 1px solid var(--brass-700);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-panel);
}
.close__plate figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; color: var(--ink-400);
}
.close__title {
  margin-top: 10px;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.2vw, 40px);
  letter-spacing: 0.16em;
  font-weight: 700;
}
.close__txt {
  margin: 16px 0 28px;
  font-size: 15px; line-height: 1.85; color: var(--ink-600); max-width: 32em;
}

/* ---- 页脚 ---- */
.lfoot {
  margin-top: 72px; padding: 28px 0 32px;
  border-top: 3px double var(--ink-700);
}
.lfoot__row {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  font-size: 12px; color: var(--ink-600);
}
.lfoot__brand { display: flex; flex-direction: column; gap: 2px; color: var(--ink-900); }
.lfoot__brand .en { font-family: var(--font-serif); font-size: 15px; font-weight: 700; }
.lfoot__brand .cn { font-family: var(--font-serif); font-size: 11px; letter-spacing: 0.2em; color: var(--ink-600); }
.lfoot__demo { margin-left: auto; }

@media (max-width: 980px) {
  .hero__grid,
  .close__grid { grid-template-columns: 1fr; }
  .hero__grid { min-height: 0; padding-top: 18px; }
  .ldial { width: min(100%, 360px); }
  .meridian { grid-template-columns: repeat(3, 1fr); }
  .meridian__item:nth-child(n+4) { border-top: 1px solid var(--paper-line); }
  .meridian__item:nth-child(4) { border-left: 0; }
  .mods { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 640px) {
  .wrap, .lnav__inner, .hero__grid { padding-left: 20px; padding-right: 20px; }
  .lnav__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 12px;
    align-items: center;
  }
  .lnav__brand { grid-row: 1; grid-column: 1; min-width: 0; }
  .lnav__brand .cn { display: none; }
  .lnav__inner > .lbtn { grid-row: 1; grid-column: 2; }
  .lnav__links { grid-row: 2; grid-column: 1 / -1; margin-left: 0; }
  html { scroll-padding-top: 104px; }
  .hero__title { letter-spacing: 0.1em; }
  .hero__stats { grid-template-columns: 1fr; }
  .hero-stat + .hero-stat { border-left: 0; border-top: 1px solid rgba(216, 188, 116, 0.18); }
  .meridian { grid-template-columns: 1fr 1fr; }
  .meridian__item:nth-child(n+3) { border-top: 1px solid var(--paper-line); }
  .meridian__item:nth-child(3),
  .meridian__item:nth-child(5) { border-left: 0; }
  .needles__head { flex-direction: column; align-items: flex-start; }
  .log__row { grid-template-columns: 1fr; gap: 10px; }
  .mods { grid-template-columns: 1fr; }
  .lfoot__demo { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mod { transition: none; }
}