/* ===== 万博体育全站 · 共享站点样式 /assets/site.css ===== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body { margin: 0; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Design tokens ---------- */
:root {
  --ink: #0B1622;
  --ink-2: #132433;
  --ink-3: #1C3040;
  --paper: #F6F2E9;
  --paper-2: #EDE7D8;
  --grass: #1F7A4D;
  --grass-deep: #145236;
  --lime: #C8F04B;
  --pulse: #FF6B35;
  --cyan: #4FD1C5;
  --muted: #6B7280;
  --body-ink: #243546;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-line: rgba(255, 255, 255, 0.16);
  --hair: rgba(11, 22, 34, 0.12);

  --font-display: 'Inter Tight', 'Archivo', 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --rail: 76px;
  --bar: 64px;
  --radius: 16px;
  --radius-sm: 9px;
  --maxw: 1200px;
}

/* ---------- 3. Base typography ---------- */
html { scroll-padding-top: calc(var(--bar) + 16px); }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body-ink);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.06;
  color: var(--ink);
}

h1 { font-size: clamp(40px, 7vw, 84px); }
h2 { font-size: clamp(28px, 3.6vw, 46px); }
h3 { font-size: clamp(20px, 2vw, 26px); }

p { margin-bottom: 1.05em; }

strong { font-weight: 600; color: var(--ink); }

::selection { background: var(--lime); color: var(--ink); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 16px;
  z-index: 999;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--lime);
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  transform: translateY(-200%);
  transition: transform 0.18s ease-out;
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. Layout containers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.container--narrow { max-width: 860px; }

.section { padding: 56px 0; }

.section--paper2 { background: var(--paper-2); }

.section--ink {
  background: var(--ink);
  color: rgba(246, 242, 233, 0.78);
}

.section--ink h1,
.section--ink h2,
.section--ink h3 { color: var(--paper); }

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 760px) {
  .bento { grid-template-columns: repeat(6, 1fr); gap: 18px; }
}

@media (min-width: 1180px) {
  .bento { grid-template-columns: repeat(12, 1fr); gap: 20px; }
}

/* ---------- 6. Eyebrow / tags / buttons ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--grass);
  flex: 0 0 auto;
}

.section--ink .eyebrow { color: rgba(246, 242, 233, 0.6); }
.section--ink .eyebrow::before { background: var(--lime); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  background: rgba(31, 122, 77, 0.12);
  color: var(--grass-deep);
}

.tag--lime { background: rgba(200, 240, 75, 0.35); color: #3a5307; }
.tag--pulse { background: rgba(255, 107, 53, 0.16); color: #9c3a12; }
.tag--dark { background: var(--glass); color: var(--lime); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-align: center;
  transition: transform 0.16s ease-out, background-color 0.16s ease-out,
    border-color 0.16s ease-out, color 0.16s ease-out;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--solid { background: var(--grass); color: #fff; }
.btn--solid:hover { background: var(--grass-deep); }

.btn--pulse { background: var(--pulse); color: #fff; }

.btn--ink { background: var(--ink); color: var(--paper); }

.btn--ghost {
  border-color: rgba(11, 22, 34, 0.22);
  color: var(--ink);
}

.btn--ghost:hover { border-color: var(--ink); background: rgba(11, 22, 34, 0.05); }

.btn--ghost-light {
  border-color: rgba(255, 255, 255, 0.26);
  color: var(--paper);
}

.btn--ghost-light:hover { border-color: var(--lime); color: var(--lime); }

/* ---------- 7. Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(107, 114, 128, 0.45);
}

.breadcrumb__link { transition: color 0.16s ease-out; }
.breadcrumb__link:hover { color: var(--grass); }

.breadcrumb__current { color: var(--ink); }

/* ---------- 8. Prose ---------- */
.prose {
  max-width: 72ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--body-ink);
}

.prose h2 {
  font-size: clamp(26px, 3vw, 36px);
  margin: 1.9em 0 0.55em;
}

.prose h3 {
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 1.7em 0 0.45em;
}

.prose ul, .prose ol { padding-left: 1.25em; margin: 0 0 1.2em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4em; }

.prose a {
  color: var(--grass-deep);
  border-bottom: 1px solid rgba(31, 122, 77, 0.45);
}

.prose a:hover { border-bottom-color: var(--grass); }

.prose blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--lime);
  color: var(--ink);
  font-size: 19px;
}

.section--ink .prose { color: rgba(246, 242, 233, 0.8); }
.section--ink .prose h2,
.section--ink .prose h3 { color: var(--paper); }
.section--ink .prose a { color: var(--cyan); border-bottom-color: rgba(79, 209, 197, 0.5); }

/* ---------- 9. Media containers ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--ink-2), var(--ink) 70%);
  isolation: isolate;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }

.media--slant {
  -webkit-clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 10. Header & rail navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  min-height: var(--bar);
  padding: 0 16px;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--glass-line);
}

.rail__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--paper);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  border-radius: 9px;
  background: var(--grass);
  color: #fff;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
}

.brand__name {
  font-size: 16px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* 菜单按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  background: var(--glass);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
  flex: 0 0 auto;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: var(--lime);
  transition: transform 0.2s ease-out, opacity 0.2s ease-out;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* 移动端抽屉 */
.rail {
  position: fixed;
  top: var(--bar);
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 110;
  display: flex;
  flex-direction: column;
  padding: 22px 22px 34px;
  background: var(--ink);
  border-top: 1px solid var(--glass-line);
  overflow-y: auto;
  transform: translateX(-101%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.26s ease-out, opacity 0.26s ease-out;
}

.rail[data-open] {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.rail__list { width: 100%; }

.rail__item { display: block; }

.rail__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  color: rgba(246, 242, 233, 0.8);
  transition: color 0.16s ease-out, background-color 0.16s ease-out;
}

.rail__link:hover { color: var(--paper); }

.rail__icon {
  flex: 0 0 auto;
  min-width: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(200, 240, 75, 0.7);
}

.rail__label {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 300;
  letter-spacing: 0.02em;
}

.rail__full { display: none; }

.rail__link[aria-current="page"] {
  color: var(--paper);
  background: linear-gradient(90deg, rgba(200, 240, 75, 0.14), transparent 70%);
}

.rail__link[aria-current="page"] .rail__label,
.rail__link[aria-current="page"] .rail__icon { color: var(--lime); }

/* 轨道底部行动入口 */
.rail__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  margin-top: auto;
  padding: 13px 18px;
  border-radius: 999px;
  background: var(--pulse);
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.08em;
  transition: transform 0.16s ease-out, background-color 0.16s ease-out;
}

.rail__cta:hover { transform: translateY(-2px); background: #e85c28; }

@media (max-width: 1023px) {
  body.nav-open { overflow: hidden; }
}

/* 桌面端：垂直轨道 */
@media (min-width: 1024px) {
  body { padding-left: var(--rail); }

  .site-header {
    position: fixed;
    top: 0;
    right: auto;
    bottom: 0;
    left: 0;
    width: var(--rail);
    min-height: 0;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 18px 0 14px;
    border-bottom: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
  }

  .rail__top {
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 100%;
  }

  .brand {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .brand__name {
    writing-mode: vertical-rl;
    font-size: 11px;
    letter-spacing: 0.14em;
    color: rgba(246, 242, 233, 0.78);
    white-space: nowrap;
  }

  .nav-toggle { display: none; }

  .rail {
    position: static;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    flex: 1 1 auto;
    padding: 0;
    background: transparent;
    border-top: 0;
    overflow: visible;
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .rail__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    width: 100%;
    margin: auto 0;
  }

  .rail__link {
    position: relative;
    flex-direction: column;
    justify-content: center;
    gap: 7px;
    width: 100%;
    padding: 10px 0;
    border-bottom: 0;
    background: none;
  }

  .rail__link[aria-current="page"] { background: none; }

  .rail__icon {
    min-width: 0;
    font-size: 10px;
    letter-spacing: 0.08em;
  }

  .rail__label {
    writing-mode: vertical-rl;
    font-family: var(--font-body);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: rgba(246, 242, 233, 0.72);
    transition: color 0.16s ease-out;
  }

  .rail__link:hover .rail__label,
  .rail__link:focus-visible .rail__label { color: var(--paper); }

  .rail__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 3px;
    height: 26px;
    border-radius: 0 3px 3px 0;
    background: var(--lime);
    transform: translateY(-50%);
  }

  .rail__full {
    display: block;
    position: absolute;
    top: 50%;
    left: calc(100% + 10px);
    z-index: 5;
    padding: 7px 13px;
    border: 1px solid var(--glass-line);
    border-radius: 9px;
    background: var(--ink-2);
    color: var(--paper);
    font-size: 12px;
    letter-spacing: 0.06em;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-50%) translateX(-5px);
    transition: opacity 0.16s ease-out, transform 0.16s ease-out;
  }

  .rail__link:hover .rail__full,
  .rail__link:focus-visible .rail__full {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }

  .rail__cta {
    align-self: center;
    margin: 12px 0 6px;
    padding: 10px 12px;
    font-size: 12px;
    letter-spacing: 0.06em;
    writing-mode: vertical-rl;
    text-align: center;
  }

  .section { padding: 84px 0; }
}

@media (min-width: 1024px) and (max-height: 720px) {
  .rail__link { padding: 7px 0; }
  .rail__icon { display: none; }
}

/* ---------- 11. Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(246, 242, 233, 0.72);
  padding: 56px 20px 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

@media (min-width: 720px) {
  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 32px; }
}

@media (min-width: 1080px) {
  .footer__inner { grid-template-columns: 1.7fr 1fr 1.5fr 1fr; gap: 44px; }
}

.brand--footer { margin-bottom: 16px; }

.footer__note {
  font-size: 14px;
  line-height: 1.75;
  max-width: 34ch;
  color: rgba(246, 242, 233, 0.66);
  margin-bottom: 14px;
}

.footer__title {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 14px;
}

.footer__list { display: block; }

.footer__list li { margin-bottom: 2px; }

.footer__link {
  display: inline-block;
  padding: 4px 0;
  font-size: 14px;
  color: rgba(246, 242, 233, 0.72);
  transition: color 0.16s ease-out, transform 0.16s ease-out;
}

.footer__link:hover {
  color: var(--lime);
  transform: translateX(3px);
}

.footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}

.footer__value {
  font-size: 14px;
  color: rgba(246, 242, 233, 0.86);
  word-break: break-word;
}

.footer__meta {
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(246, 242, 233, 0.5);
  margin-top: 12px;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: var(--glass);
  color: rgba(246, 242, 233, 0.8);
  font-size: 11px;
  letter-spacing: 0.08em;
  transition: border-color 0.16s ease-out, color 0.16s ease-out;
}

.copy-btn:hover { border-color: var(--cyan); color: var(--paper); }

.copy-btn[data-copied="true"] {
  border-color: var(--lime);
  color: var(--lime);
}

.footer__base {
  max-width: var(--maxw);
  margin: 42px auto 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  font-size: 12px;
  color: rgba(246, 242, 233, 0.45);
}

.footer__base-item {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 12. Scroll motion & utilities ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 140;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), var(--cyan) 55%, var(--pulse));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 130;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: 0.1em;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}

.to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (min-width: 1024px) {
  .to-top { right: 22px; bottom: 22px; }
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .rail { transition: none; }
}