/* =========================================================
   Site Kit · 万博MAX官方品牌站
   基底：深墨蓝夜间指挥舱 ｜ 强调：琥珀金 + 电光青
   前缀：ms-（midnight signal）
   ========================================================= */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 140px;
}

body,
h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }

ul, ol { list-style: none; padding: 0; }

img, svg, video { display: block; max-width: 100%; }

button { font: inherit; color: inherit; background: none; border: 0; }

a { color: inherit; text-decoration: none; }

/* ---------- tokens ---------- */
:root {
  --ms-ink: #08131F;
  --ms-panel: #0E2233;
  --ms-panel-2: #163249;
  --ms-amber: #F2A93B;
  --ms-amber-deep: #B97820;
  --ms-cyan: #2DD4C8;
  --ms-cyan-soft: #8FE8E0;
  --ms-white: #E8EDF2;
  --ms-silver: #9FB0C0;
  --ms-alert: #E86A5A;

  --ms-line: rgba(143, 232, 224, .16);
  --ms-line-soft: rgba(143, 232, 224, .10);
  --ms-line-amber: rgba(242, 169, 59, .42);

  --ms-shadow: 0 22px 48px -30px rgba(0, 0, 0, .9);
  --ms-radius: 3px;
  --ms-shell: 1240px;
  --ms-gutter: 20px;
  --ms-ease: cubic-bezier(.22, .61, .36, 1);

  --ms-display: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --ms-serif: Georgia, "Songti SC", "Noto Serif SC", "SimSun", serif;
  --ms-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

/* ---------- base ---------- */
body {
  background-color: var(--ms-ink);
  color: var(--ms-white);
  font-family: var(--ms-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .012em;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 10% -10%, rgba(45, 212, 200, .10), transparent 70%),
    radial-gradient(760px 460px at 94% 2%, rgba(242, 169, 59, .08), transparent 72%),
    linear-gradient(180deg, rgba(22, 50, 73, .5), rgba(8, 19, 31, 0) 40%);
}

h1, h2, h3, h4 {
  font-family: var(--ms-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.005em;
}

h1 { font-size: clamp(32px, 4.4vw, 52px); }
h2 { font-size: clamp(24px, 2.8vw, 34px); }
h3 { font-size: clamp(19px, 1.8vw, 23px); }

p { max-width: 78ch; }

a {
  color: var(--ms-cyan);
  transition: color .2s var(--ms-ease);
}

a:hover { color: var(--ms-cyan-soft); }

:focus-visible {
  outline: 2px solid var(--ms-amber);
  outline-offset: 3px;
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -72px;
  z-index: 140;
  padding: 10px 16px;
  background: var(--ms-amber);
  color: #0A1520;
  font-family: var(--ms-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: 2px;
  transition: top .18s var(--ms-ease);
}

.skip-link:focus { top: 12px; color: #0A1520; }

/* ---------- header ---------- */
.ms-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(8, 19, 31, .94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ms-line);
}

.ms-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  z-index: 6;
  background: linear-gradient(90deg, var(--ms-cyan), var(--ms-amber));
  pointer-events: none;
}

.ms-rail {
  background: linear-gradient(90deg, rgba(22, 50, 73, .92), rgba(14, 34, 51, .7) 48%, rgba(45, 212, 200, .10));
  border-bottom: 1px solid var(--ms-line-soft);
  font-size: 13px;
  color: var(--ms-silver);
}

.ms-rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 24px;
  padding-block: 9px;
}

.ms-rail__brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: none;
  letter-spacing: .04em;
}

.ms-rail__mark {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 1px;
  background: var(--ms-amber);
  box-shadow: 0 0 0 3px rgba(242, 169, 59, .16);
}

.ms-rail__sep { color: rgba(159, 176, 192, .45); }

.ms-rail__tag {
  font-family: var(--ms-serif);
  color: rgba(232, 237, 242, .82);
  letter-spacing: .04em;
}

.ms-rail__quick {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: none;
}

.ms-rail__quicklabel {
  font-family: var(--ms-display);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: rgba(159, 176, 192, .85);
}

.ms-rail__link {
  color: var(--ms-cyan);
  border-bottom: 1px solid rgba(45, 212, 200, .38);
  padding-bottom: 1px;
  transition: color .2s var(--ms-ease), border-color .2s var(--ms-ease);
}

.ms-rail__link:hover {
  color: var(--ms-cyan-soft);
  border-color: var(--ms-amber);
}

.ms-deck__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-block: 13px;
}

.ms-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--ms-white);
}

.ms-brand:hover { color: var(--ms-white); }

.ms-brand__glyph {
  font-family: var(--ms-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
  color: #08131F;
  background: linear-gradient(140deg, var(--ms-amber), #FFD07A);
  padding: 9px 10px;
  border-radius: 2px;
}

.ms-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.28;
}

.ms-brand__name {
  font-family: var(--ms-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
}

.ms-brand__sub {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ms-silver);
}

.ms-burger {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 14px;
  cursor: pointer;
  border: 1px solid var(--ms-line);
  border-radius: 2px;
  background: rgba(22, 50, 73, .72);
  color: var(--ms-white);
  font-family: var(--ms-display);
  font-size: 14px;
  letter-spacing: .08em;
  transition: border-color .2s var(--ms-ease), background-color .2s var(--ms-ease);
}

.ms-burger:hover { border-color: rgba(45, 212, 200, .45); }

.ms-burger__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.ms-burger__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--ms-cyan);
  transition: transform .2s var(--ms-ease), opacity .2s var(--ms-ease);
}

.ms-header[data-open="true"] .ms-burger { border-color: var(--ms-line-amber); }

.ms-header[data-open="true"] .ms-burger__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.ms-header[data-open="true"] .ms-burger__bars i:nth-child(2) { opacity: 0; }
.ms-header[data-open="true"] .ms-burger__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.ms-nav { margin-left: auto; }

.ms-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.ms-nav__link {
  display: block;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 15px;
  color: rgba(232, 237, 242, .78);
  transition: color .2s var(--ms-ease), border-color .2s var(--ms-ease), background-color .2s var(--ms-ease);
}

.ms-nav__link:hover {
  color: var(--ms-white);
  border-color: rgba(45, 212, 200, .36);
  background: rgba(45, 212, 200, .07);
}

.ms-nav__link[aria-current="page"] {
  color: var(--ms-amber);
  border-color: var(--ms-line-amber);
  background: rgba(242, 169, 59, .09);
}

/* ---------- footer ---------- */
.ms-footer {
  position: relative;
  z-index: 1;
  margin-top: 72px;
  background: linear-gradient(180deg, rgba(14, 34, 51, .4), #050C15);
  border-top: 1px solid var(--ms-line);
}

.ms-footer__top {
  display: grid;
  grid-template-columns: 1.15fr .8fr 1.05fr;
  gap: 32px;
  padding-block: 52px 40px;
}

.ms-footer__brand {
  font-family: var(--ms-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .02em;
}

.ms-footer__note {
  margin-top: 12px;
  color: var(--ms-silver);
  font-size: 14.5px;
  max-width: 34ch;
}

.ms-footer__brandblock .ms-btn { margin-top: 20px; }

.ms-footer__label {
  font-family: var(--ms-display);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ms-amber);
  margin-bottom: 14px;
}

.ms-footer__links {
  display: grid;
  gap: 9px;
}

.ms-footer__links a {
  display: inline-block;
  font-size: 15px;
  color: rgba(232, 237, 242, .82);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .2s var(--ms-ease), border-color .2s var(--ms-ease);
}

.ms-footer__links a:hover {
  color: var(--ms-cyan);
  border-color: rgba(45, 212, 200, .5);
}

.ms-footer__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding-block: 7px;
  font-size: 14px;
  color: var(--ms-silver);
  border-bottom: 1px dashed var(--ms-line-soft);
  max-width: 46ch;
}

.ms-footer__key {
  font-family: var(--ms-display);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ms-cyan-soft);
}

.ms-copy {
  margin-left: auto;
  padding: 4px 10px;
  cursor: pointer;
  border: 1px solid rgba(45, 212, 200, .4);
  border-radius: 2px;
  background: transparent;
  color: var(--ms-cyan);
  font-size: 12px;
  letter-spacing: .06em;
  transition: background-color .2s var(--ms-ease), color .2s var(--ms-ease), border-color .2s var(--ms-ease);
}

.ms-copy:hover {
  background: rgba(45, 212, 200, .12);
  color: var(--ms-cyan-soft);
}

.ms-copy[data-state="done"] {
  border-color: var(--ms-amber);
  color: var(--ms-amber);
  background: rgba(242, 169, 59, .1);
}

.ms-copy[data-state="error"] {
  border-color: var(--ms-alert);
  color: var(--ms-alert);
  background: rgba(232, 106, 90, .1);
}

.ms-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 20px 26px;
  border-top: 1px solid var(--ms-line-soft);
}

.ms-footer__legal {
  font-size: 13.5px;
  letter-spacing: .06em;
  color: var(--ms-silver);
}

.ms-footer__meta {
  font-size: 13px;
  color: rgba(159, 176, 192, .8);
}

.ms-top {
  padding: 9px 16px;
  cursor: pointer;
  border: 1px solid var(--ms-line);
  border-radius: 2px;
  background: rgba(22, 50, 73, .6);
  color: var(--ms-white);
  font-family: var(--ms-display);
  font-size: 13.5px;
  letter-spacing: .08em;
  transition: border-color .2s var(--ms-ease), color .2s var(--ms-ease), background-color .2s var(--ms-ease);
}

.ms-top:hover {
  border-color: var(--ms-line-amber);
  color: var(--ms-amber);
  background: rgba(242, 169, 59, .08);
}

/* ---------- layout ---------- */
.ms-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--ms-shell);
  margin-inline: auto;
  padding-inline: var(--ms-gutter);
}

.ms-main {
  position: relative;
  z-index: 1;
}

.ms-section { padding-block: 56px; }
.ms-section--tight { padding-block: 32px; }

.ms-stack { display: grid; gap: 24px; }

.ms-grid { display: grid; gap: 24px; }
.ms-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ms-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ms-grid--split { grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr); }
.ms-grid--mirror { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.ms-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(45, 212, 200, .55), rgba(242, 169, 59, .28), transparent);
}

/* ---------- typography blocks ---------- */
.ms-heading { display: grid; gap: 10px; }

.ms-heading__index {
  font-family: var(--ms-display);
  font-size: 12.5px;
  letter-spacing: .3em;
  color: var(--ms-amber);
}

.ms-heading__title { font-size: clamp(26px, 3vw, 36px); }

.ms-heading__lead {
  color: var(--ms-silver);
  font-size: 16.5px;
  max-width: 62ch;
}

.ms-lede {
  font-size: clamp(17px, 1.5vw, 19px);
  color: rgba(232, 237, 242, .9);
  max-width: 64ch;
}

.ms-note {
  font-size: 13.5px;
  color: var(--ms-silver);
}

.ms-em { color: var(--ms-amber); font-weight: 600; }
.ms-em--cyan { color: var(--ms-cyan); font-weight: 600; }

.ms-list {
  display: grid;
  gap: 11px;
  color: var(--ms-silver);
  font-size: 15.5px;
}

.ms-list li {
  position: relative;
  padding-left: 18px;
}

.ms-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--ms-cyan);
}

.ms-list--amber li::before { background: var(--ms-amber); }

/* ---------- breadcrumb ---------- */
.ms-crumb {
  padding-block: 16px;
  border-bottom: 1px solid var(--ms-line-soft);
}

.ms-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ms-silver);
}

.ms-crumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ms-crumb__item + .ms-crumb__item::before {
  content: "/";
  color: rgba(159, 176, 192, .45);
}

.ms-crumb__link { color: var(--ms-silver); }
.ms-crumb__link:hover { color: var(--ms-cyan); }
.ms-crumb__current { color: var(--ms-white); }

/* ---------- panels & cards ---------- */
.ms-panel {
  position: relative;
  padding: 28px;
  border: 1px solid var(--ms-line);
  border-radius: var(--ms-radius);
  background: linear-gradient(160deg, rgba(14, 34, 51, .92), rgba(8, 19, 31, .88));
  box-shadow: var(--ms-shadow);
}

.ms-panel--accent { border-color: var(--ms-line-amber); }
.ms-panel--accent::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--ms-amber), transparent);
}

.ms-panel--glow::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  background:
    radial-gradient(420px 220px at 8% 0%, rgba(45, 212, 200, .14), transparent 70%),
    radial-gradient(360px 200px at 92% 100%, rgba(242, 169, 59, .12), transparent 72%);
}

.ms-card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--ms-line);
  border-radius: var(--ms-radius);
  background: rgba(14, 34, 51, .72);
  transition: border-color .24s var(--ms-ease), background-color .24s var(--ms-ease), transform .24s var(--ms-ease);
}

.ms-card:hover {
  border-color: rgba(45, 212, 200, .42);
  background: rgba(22, 50, 73, .62);
  transform: translateY(-2px);
}

.ms-card__label {
  font-family: var(--ms-display);
  font-size: 11.5px;
  letter-spacing: .22em;
  color: var(--ms-amber);
}

.ms-card__title { margin-top: 8px; font-size: 20px; }

.ms-card__text {
  margin-top: 10px;
  font-size: 15.5px;
  color: var(--ms-silver);
}

.ms-card__meta {
  margin-top: 16px;
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(159, 176, 192, .85);
}

.ms-placard {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 20px 22px;
  border-left: 2px solid var(--ms-amber);
  background: linear-gradient(90deg, rgba(242, 169, 59, .09), rgba(242, 169, 59, 0) 62%);
}

.ms-placard__index {
  font-family: var(--ms-display);
  font-size: 34px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--ms-amber);
}

.ms-placard__body { display: grid; gap: 6px; }

/* ---------- tags & figures ---------- */
.ms-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid rgba(45, 212, 200, .4);
  border-radius: 999px;
  background: rgba(45, 212, 200, .08);
  color: var(--ms-cyan);
  font-size: 12.5px;
  letter-spacing: .08em;
}

.ms-tag--amber {
  border-color: rgba(242, 169, 59, .45);
  background: rgba(242, 169, 59, .1);
  color: var(--ms-amber);
}

.ms-tag--alert {
  border-color: rgba(232, 106, 90, .5);
  background: rgba(232, 106, 90, .1);
  color: var(--ms-alert);
}

.ms-figure {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--ms-line);
  border-radius: var(--ms-radius);
  background: linear-gradient(150deg, var(--ms-panel-2), var(--ms-ink) 72%);
}

.ms-figure__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: linear-gradient(140deg, rgba(45, 212, 200, .10), rgba(242, 169, 59, .08));
}

.ms-figure__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 16px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ms-white);
  background: linear-gradient(180deg, transparent, rgba(8, 19, 31, .94));
}

.ms-figure--wide { aspect-ratio: 21 / 9; }
.ms-figure--tall { aspect-ratio: 4 / 5; }

/* ---------- buttons ---------- */
.ms-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  font-family: var(--ms-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  color: #0A1520;
  background: linear-gradient(135deg, var(--ms-amber), #FFC978);
  transition: transform .2s var(--ms-ease), box-shadow .2s var(--ms-ease), background-color .2s var(--ms-ease), color .2s var(--ms-ease), border-color .2s var(--ms-ease);
}

.ms-btn:hover {
  color: #0A1520;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -16px rgba(242, 169, 59, .75);
}

.ms-btn--ghost {
  background: transparent;
  border-color: rgba(45, 212, 200, .44);
  color: var(--ms-cyan);
  font-weight: 600;
}

.ms-btn--ghost:hover {
  color: var(--ms-cyan-soft);
  background: rgba(45, 212, 200, .1);
  box-shadow: none;
  transform: none;
}

.ms-btn--quiet {
  background: rgba(22, 50, 73, .7);
  border-color: var(--ms-line);
  color: var(--ms-white);
  font-weight: 600;
}

.ms-btn--quiet:hover {
  color: var(--ms-amber);
  border-color: var(--ms-line-amber);
  box-shadow: none;
}

/* ---------- reveal ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s var(--ms-ease), transform .6s var(--ms-ease);
}

html.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .ms-footer__top { grid-template-columns: 1fr 1fr; }
  .ms-footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 120px; }

  .ms-burger { display: inline-flex; }

  .ms-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin: 0;
    max-height: min(72vh, 520px);
    overflow-y: auto;
    background: linear-gradient(180deg, var(--ms-panel), var(--ms-ink));
    border-bottom: 1px solid rgba(45, 212, 200, .22);
    box-shadow: var(--ms-shadow);
  }

  .ms-header[data-open="true"] .ms-nav { display: block; }

  .ms-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--ms-gutter) 18px;
  }

  .ms-nav__link {
    padding: 14px 12px;
    border: 0;
    border-bottom: 1px solid var(--ms-line-soft);
    border-radius: 0;
    font-size: 16px;
  }

  .ms-nav__link[aria-current="page"] {
    border-bottom-color: var(--ms-line-amber);
    background: linear-gradient(90deg, rgba(242, 169, 59, .14), transparent);
    padding-left: 16px;
  }

  .ms-grid--3,
  .ms-grid--split,
  .ms-grid--mirror { grid-template-columns: minmax(0, 1fr); }

  .ms-section { padding-block: 44px; }
}

@media (max-width: 640px) {
  :root { --ms-gutter: 16px; }

  body { font-size: 16px; }

  .ms-rail { font-size: 12.5px; }
  .ms-rail__inner { gap: 4px 14px; padding-block: 8px; }
  .ms-rail__tag { display: none; }
  .ms-rail__sep { display: none; }

  .ms-brand__sub { display: none; }

  .ms-grid--2 { grid-template-columns: minmax(0, 1fr); }

  .ms-panel { padding: 20px; }

  .ms-placard {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .ms-footer { margin-top: 54px; }
  .ms-footer__top {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding-block: 38px 26px;
  }
  .ms-footer__note { max-width: none; }
  .ms-footer__bottom { justify-content: flex-start; }
  .ms-figure--wide { aspect-ratio: 16 / 10; }
}

/* ---------- motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}