/* =========================================================
   大港奥 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption, blockquote {
  margin: 0;
}

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

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

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

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

hr { border: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  --sand: #F7EDDD;
  --sand-2: #EADCC4;
  --ink: #1C1A16;
  --ink-2: #4A463E;
  --cobalt: #1E4FD8;
  --cobalt-deep: #14307E;
  --copper: #1C8A70;
  --copper-light: #B7E0D2;
  --orange: #FF6A13;
  --card: #FFFFFF;
  --rule: #C9B99C;

  --radius: 10px;
  --shadow: 0 1px 0 rgba(28, 26, 22, .06);
  --max: 1180px;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--sand);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: .04em;
  color: var(--ink);
}

h1 { font-size: clamp(30px, 4.4vw, 52px); }
h2 { font-size: clamp(22px, 2.6vw, 30px); }
h3 { font-size: clamp(18px, 2vw, 21px); letter-spacing: .03em; }
h4 { font-size: 17px; letter-spacing: .02em; }

strong, b { font-weight: 700; }

::selection {
  background: var(--cobalt);
  color: #fff;
}

/* ---------- 4. 容器 / 网格 ---------- */
.dgo-container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.dgo-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.dgo-col-4  { grid-column: span 4; }
.dgo-col-5  { grid-column: span 5; }
.dgo-col-6  { grid-column: span 6; }
.dgo-col-7  { grid-column: span 7; }
.dgo-col-8  { grid-column: span 8; }
.dgo-col-12 { grid-column: span 12; }

/* ---------- 5. 切片节奏 ---------- */
.dgo-slice {
  padding: 56px 0;
  border-top: 1px solid var(--rule);
}

.dgo-slice--tint { background: var(--sand-2); }
.dgo-slice--tight { padding: 36px 0; }

/* ---------- 6. 排版小件 ---------- */
.dgo-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--copper);
  line-height: 1.6;
}

.dgo-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cobalt);
  font-variant-numeric: tabular-nums;
}

.dgo-prose { max-width: 64ch; }
.dgo-prose p + p { margin-top: 16px; }

.dgo-small {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-2);
}

.dgo-ruler {
  height: 8px;
  border-top: 1px solid var(--rule);
  background-image: repeating-linear-gradient(to right, var(--rule) 0 1px, transparent 1px 14px);
  background-repeat: repeat-x;
  background-position: 0 0;
}

/* ---------- 7. 按钮 ---------- */
.dgo-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.dgo-btn--primary {
  background: var(--cobalt);
  color: #fff;
}
.dgo-btn--primary:hover { background: var(--cobalt-deep); }

.dgo-btn--ghost {
  background: var(--card);
  color: var(--ink);
  border-color: var(--rule);
}
.dgo-btn--ghost:hover {
  color: var(--cobalt);
  border-color: var(--cobalt);
}

.dgo-btn--direct {
  background: var(--orange);
  color: var(--ink);
  border-color: rgba(28, 26, 22, .2);
}
.dgo-btn--direct::after {
  content: "→";
  transition: transform .18s var(--ease);
}
.dgo-btn--direct:hover::after { transform: translateX(4px); }

/* ---------- 8. 标签 ---------- */
.dgo-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--copper-light);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  line-height: 1.8;
  white-space: nowrap;
}

.dgo-tag--cobalt { background: var(--cobalt); color: #fff; }
.dgo-tag--copper { background: var(--copper); color: #fff; }
.dgo-tag--outline {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-2);
}

/* ---------- 9. 面包屑 ---------- */
.dgo-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-2);
}
.dgo-crumb a { color: var(--cobalt); }
.dgo-crumb a:hover { text-decoration: underline; }
.dgo-crumb-sep { color: var(--rule); }

/* ---------- 10. 卡片与条目 ---------- */
.dgo-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.dgo-entry {
  position: relative;
  display: block;
  padding: 14px 16px 14px 22px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .18s var(--ease);
}
.dgo-entry::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--copper);
  transition: width .18s var(--ease), background .18s var(--ease);
}
.dgo-entry:hover { border-color: var(--cobalt); }
.dgo-entry:hover::before { width: 8px; background: var(--cobalt); }

/* ---------- 11. 图片容器 ---------- */
.dgo-media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--sand-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.dgo-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.dgo-media--wide { aspect-ratio: 21 / 9; }
.dgo-media--square { aspect-ratio: 1 / 1; }
.dgo-media--tall { aspect-ratio: 4 / 5; }

.dgo-figure { margin: 0; }
.dgo-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-2);
}

/* ---------- 12. 分段切换（tabs） ---------- */
.dgo-tabs { margin-top: 24px; }

.dgo-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.dgo-tab {
  padding: 7px 16px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease);
}
.dgo-tab:hover {
  color: var(--cobalt);
  border-color: var(--cobalt);
}
.dgo-tab[aria-selected="true"] {
  background: var(--cobalt);
  border-color: var(--cobalt);
  color: #fff;
  font-weight: 700;
}

.dgo-tabpanel { padding-top: 26px; }
.dgo-tabpanel[hidden] { display: none; }

/* ---------- 13. 头部 ---------- */
.dgo-header {
  position: relative;
  z-index: 60;
  background: var(--sand);
}

.dgo-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 6px;
  background: var(--cobalt);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  transform: translateY(-240%);
  transition: transform .18s var(--ease);
}
.dgo-skip:focus,
.dgo-skip:focus-visible { transform: none; }

.dgo-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 280;
  background: rgba(28, 26, 22, .08);
  pointer-events: none;
}
.dgo-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--cobalt);
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

.dgo-masthead {
  background: var(--sand);
  border-bottom: 1px solid var(--rule);
}
.dgo-masthead-inner {
  padding: 26px 0 18px;
  text-align: center;
}
.dgo-brand {
  display: inline-block;
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: .16em;
  text-indent: .16em;
  color: var(--ink);
  transition: color .18s var(--ease);
}
.dgo-brand:hover { color: var(--cobalt-deep); }

.dgo-tagline {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  text-indent: .26em;
  color: var(--cobalt);
}

.dgo-navbar {
  position: relative;
  background: var(--sand);
  border-bottom: 2px solid var(--cobalt);
}
.dgo-navbar-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
}

.dgo-nav { display: block; }

.dgo-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
}

.dgo-nav-item { display: flex; align-items: center; }

.dgo-nav-item + .dgo-nav-item::before {
  content: "";
  display: block;
  width: 1px;
  height: 14px;
  background: var(--rule);
  flex: none;
}

.dgo-nav-link {
  position: relative;
  display: inline-block;
  padding: 15px 20px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink);
  transition: color .18s var(--ease);
}
.dgo-nav-link:hover { color: var(--cobalt); }

.dgo-nav-link[aria-current="page"] {
  color: var(--cobalt);
  font-weight: 700;
}
.dgo-nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 9px;
  height: 2px;
  border-radius: 1px;
  background: var(--cobalt);
}

.dgo-quick {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid rgba(28, 26, 22, .22);
  border-radius: 4px;
  background: var(--orange);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.5;
  white-space: nowrap;
  transition: box-shadow .18s var(--ease);
}
.dgo-quick::after {
  content: "→";
  transition: transform .18s var(--ease);
}
.dgo-quick:hover { box-shadow: 0 2px 0 rgba(28, 26, 22, .16); }
.dgo-quick:hover::after { transform: translateX(5px); }

.dgo-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.dgo-nav-toggle:hover { border-color: var(--cobalt); color: var(--cobalt); }

.dgo-nav-toggle-icon {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background .18s var(--ease);
}
.dgo-nav-toggle-icon::before,
.dgo-nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform .18s var(--ease);
}
.dgo-nav-toggle-icon::before { top: -5px; }
.dgo-nav-toggle-icon::after { top: 5px; }

.dgo-nav-toggle[aria-expanded="true"] .dgo-nav-toggle-icon { background: transparent; }
.dgo-nav-toggle[aria-expanded="true"] .dgo-nav-toggle-icon::before { transform: translateY(5px) rotate(45deg); }
.dgo-nav-toggle[aria-expanded="true"] .dgo-nav-toggle-icon::after { transform: translateY(-5px) rotate(-45deg); }

.dgo-nav-toggle-text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
}

/* ---------- 14. 页脚 ---------- */
.dgo-footer {
  background: var(--sand-2);
  border-top: 2px solid var(--cobalt);
  padding: 56px 0 26px;
  color: var(--ink);
}

.dgo-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1.7fr;
  gap: 32px 28px;
  align-items: start;
}

.dgo-footer-logo {
  display: inline-block;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: .14em;
  color: var(--ink);
  transition: color .18s var(--ease);
}
.dgo-footer-logo:hover { color: var(--cobalt-deep); }

.dgo-footer-tagline {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cobalt);
}

.dgo-footer-note {
  margin-top: 14px;
  max-width: 22ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}

.dgo-footer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink);
}
.dgo-footer-title::before {
  content: "";
  display: block;
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--copper);
}

.dgo-footer-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.dgo-footer-link {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.dgo-footer-link:hover {
  color: var(--cobalt);
  border-bottom-color: var(--cobalt);
}

.dgo-contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  font-size: 13px;
  line-height: 1.6;
}
.dgo-contact-key {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--copper);
}
.dgo-contact-value { color: var(--ink); }

.dgo-copy {
  padding: 2px 8px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--card);
  color: var(--cobalt);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  line-height: 1.6;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease);
}
.dgo-copy:hover {
  background: var(--cobalt);
  border-color: var(--cobalt);
  color: #fff;
}
.dgo-copy[data-copied="yes"] {
  background: var(--copper);
  border-color: var(--copper);
  color: #fff;
}
.dgo-copy[data-copied="no"] {
  background: var(--sand);
  border-color: var(--rule);
  color: var(--ink);
}

.dgo-footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: 44px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-2);
}
.dgo-footer-meta { display: inline-block; }

/* ---------- 15. 焦点与可访问性 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 2px;
  border-radius: 3px;
}

#main-content:focus { outline: none; }

/* ---------- 16. 入场（由 JS 添加状态类） ---------- */
[data-reveal].is-pending {
  opacity: 0;
  transform: translateY(12px);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}

/* ---------- 17. 响应式：平板 ---------- */
@media (max-width: 1080px) {
  .dgo-nav-link { padding: 15px 13px; font-size: 14px; }
  .dgo-nav-link[aria-current="page"]::after { left: 13px; right: 13px; }
  .dgo-footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.4fr; }
  .dgo-footer-brand { grid-column: 1 / -1; }
}

/* ---------- 18. 响应式：移动 ---------- */
@media (max-width: 860px) {
  .dgo-container { padding: 0 18px; }

  .dgo-masthead-inner { padding: 20px 0 14px; }
  .dgo-brand { letter-spacing: .12em; text-indent: .12em; }
  .dgo-tagline { font-size: 10px; letter-spacing: .2em; text-indent: .2em; }

  .dgo-navbar-inner {
    justify-content: space-between;
    align-items: center;
    min-height: 0;
    padding: 9px 0;
  }

  .dgo-nav-toggle { display: inline-flex; }

  .dgo-quick {
    position: static;
    transform: none;
    font-size: 11px;
    padding: 6px 10px;
  }

  .dgo-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: -2px;
    right: -2px;
    z-index: 90;
    background: var(--card);
    border: 1px solid var(--rule);
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: 0 14px 28px rgba(28, 26, 22, .14);
    overflow: hidden;
  }
  .dgo-nav[data-open] { display: block; }

  .dgo-nav-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
  }
  .dgo-nav-item { display: block; }
  .dgo-nav-item + .dgo-nav-item::before { display: none; }
  .dgo-nav-item + .dgo-nav-item { border-top: 1px solid var(--rule); }

  .dgo-nav-link {
    display: block;
    padding: 14px 18px;
    font-size: 16px;
  }
  .dgo-nav-link[aria-current="page"] { background: var(--sand); }
  .dgo-nav-link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 12px;
    bottom: 12px;
    width: 3px;
    height: auto;
    border-radius: 0;
  }

  .dgo-grid { gap: 20px; }
  .dgo-col-4,
  .dgo-col-5,
  .dgo-col-6,
  .dgo-col-7,
  .dgo-col-8 { grid-column: 1 / -1; }

  .dgo-slice { padding: 40px 0; }
  .dgo-slice--tight { padding: 28px 0; }

  .dgo-media--wide { aspect-ratio: 16 / 9; }

  .dgo-footer { padding: 44px 0 22px; }
  .dgo-footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 26px 20px;
  }
  .dgo-footer-brand { grid-column: 1 / -1; }
  .dgo-footer-contact { grid-column: 1 / -1; }
  .dgo-footer-legal { margin-top: 32px; }
}

@media (max-width: 560px) {
  .dgo-footer-grid { grid-template-columns: 1fr; }
  .dgo-footer-note { max-width: none; }
  body { line-height: 1.7; }
}

/* ---------- 19. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

  [data-reveal].is-pending,
  [data-reveal].is-in {
    opacity: 1 !important;
    transform: none !important;
  }

  .dgo-entry:hover::before { width: 4px; }
  .dgo-quick:hover::after,
  .dgo-btn--direct:hover::after { transform: none; }
}

@media print {
  .dgo-progress,
  .dgo-nav-toggle,
  .dgo-quick,
  .dgo-skip { display: none !important; }
}