/* ==========================================================================
   鼎利娱乐 · 共享站点样式  /assets/site.css
   语言：蓝图网格 · 切角面板 · 绒布墨绿与鎏金
   ========================================================================== */

/* 1. RESET ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dt, dd, figure, blockquote {
  margin: 0;
  padding: 0;
}
ul, ol { 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; }
[hidden] { display: none !important; }
main { display: block; }
#main-content { scroll-margin-top: 120px; }

/* 2. 变量 ----------------------------------------------------------------- */
:root {
  --dl-ink: #0E2B24;
  --dl-ink-2: #14382E;
  --dl-ink-3: #1E4A3D;
  --dl-gold: #C8A24A;
  --dl-gold-soft: #E3C97F;
  --dl-cinnabar: #A6342B;
  --dl-paper: #F5F0E6;
  --dl-paper-2: #E8E0D0;
  --dl-inktext: #1B1B18;
  --dl-muted: #55655C;
  --dl-line: #C9C2B2;
  --dl-line-gold: rgba(200, 162, 74, .30);

  --dl-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --dl-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --dl-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --dl-shell: 1220px;
  --dl-gutter: clamp(18px, 4vw, 42px);
  --dl-header-h: 74px;
  --dl-ease: cubic-bezier(.22, .61, .36, 1);
  --dl-cut: 16px;
}

/* 3. 基础排版 ------------------------------------------------------------- */
body {
  background-color: var(--dl-paper);
  color: var(--dl-inktext);
  font-family: var(--dl-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: var(--dl-serif); font-weight: 900; line-height: 1.18; letter-spacing: -.01em; }
p { max-width: 38em; }
.dl-serif { font-family: var(--dl-serif); font-weight: 900; }
.dl-mono { font-family: var(--dl-mono); font-variant-numeric: tabular-nums; letter-spacing: .02em; }

:focus-visible { outline: 2px solid var(--dl-gold-soft); outline-offset: 2px; }

/* 4. 跳过链接 ------------------------------------------------------------- */
.dl-skip {
  position: fixed;
  left: 16px;
  top: -72px;
  z-index: 200;
  padding: 11px 20px;
  background: var(--dl-gold);
  color: #1c1405;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  border-radius: 0 0 12px 12px;
  transition: top .22s var(--dl-ease);
}
.dl-skip:focus { top: 0; }

/* 5. 容器 ----------------------------------------------------------------- */
.dl-shell {
  width: 100%;
  max-width: var(--dl-shell);
  margin-inline: auto;
  padding-inline: var(--dl-gutter);
}
.dl-main { padding-top: var(--dl-header-h); }

/* 6. 头部 ----------------------------------------------------------------- */
.dl-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  color: var(--dl-paper);
  padding: 14px 0 15px;
  background: linear-gradient(180deg, rgba(14, 43, 36, .95), rgba(14, 43, 36, .80));
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--dl-line-gold);
  transition: padding .3s var(--dl-ease), background .3s var(--dl-ease);
}
.dl-header[data-scrolled="true"] {
  padding: 8px 0 9px;
  background: rgba(14, 43, 36, .98);
}
.dl-header__shell {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  width: 100%;
  max-width: var(--dl-shell);
  margin-inline: auto;
  padding-inline: var(--dl-gutter);
}
.dl-header__rail {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: rgba(200, 162, 74, .12);
  overflow: hidden;
}
.dl-header__railfill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--dl-cinnabar), var(--dl-gold) 45%, var(--dl-gold-soft));
}

/* 品牌署名 */
.dl-brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; min-width: 0; }
.dl-brand__mark {
  flex: 0 0 auto;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  font-family: var(--dl-serif);
  font-weight: 900;
  font-size: 19px;
  color: var(--dl-gold-soft);
  background: linear-gradient(150deg, var(--dl-ink-3), var(--dl-ink-2));
  box-shadow: inset 0 0 0 1px rgba(200, 162, 74, .55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 11px), calc(100% - 11px) 100%, 0 100%);
}
.dl-brand__text { display: flex; flex-direction: column; min-width: 0; }
.dl-brand__name {
  font-family: var(--dl-serif);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.2;
  letter-spacing: .08em;
  color: var(--dl-paper);
}
.dl-brand__tagline {
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: rgba(245, 240, 230, .55);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 30em;
}

/* 悬浮胶囊导航 */
.dl-nav {
  flex: 0 1 auto;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(30, 74, 61, .72), rgba(20, 56, 46, .88));
  box-shadow: inset 0 0 0 1px var(--dl-line-gold), 0 12px 28px -22px rgba(0, 0, 0, .95);
}
.dl-nav__list { display: flex; align-items: center; gap: 2px; }
.dl-nav__item { display: block; }
.dl-nav__link {
  display: block;
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
  white-space: nowrap;
  color: rgba(245, 240, 230, .78);
  transition: color .2s var(--dl-ease), background .2s var(--dl-ease);
}
.dl-nav__link:hover { color: var(--dl-gold-soft); background: rgba(200, 162, 74, .10); }
.dl-nav__link[aria-current="page"] {
  color: #1b1405;
  font-weight: 700;
  background: linear-gradient(180deg, var(--dl-gold-soft), var(--dl-gold));
  box-shadow: 0 8px 20px -14px rgba(200, 162, 74, .95);
}
.dl-nav__foot { display: none; }
.dl-nav__cta { width: 100%; }

/* 赛季阶段徽标 */
.dl-phase {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: rgba(245, 240, 230, .82);
  border: 1px solid rgba(200, 162, 74, .42);
  background: rgba(200, 162, 74, .07);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background .2s var(--dl-ease), border-color .2s var(--dl-ease);
}
.dl-phase:hover { background: rgba(200, 162, 74, .17); border-color: rgba(200, 162, 74, .72); }
.dl-phase__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--dl-cinnabar);
  box-shadow: 0 0 0 3px rgba(166, 52, 43, .25);
  animation: dl-pulse 2.6s ease-in-out infinite;
}
.dl-phase__label { color: rgba(245, 240, 230, .5); }
.dl-phase__value { font-family: var(--dl-mono); letter-spacing: .06em; color: var(--dl-gold-soft); }
@keyframes dl-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .32; } }

/* 移动导航按钮 */
.dl-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(200, 162, 74, .42);
  background: rgba(200, 162, 74, .08);
  color: var(--dl-paper);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
}
.dl-navtoggle__bars { position: relative; display: block; width: 18px; height: 13px; }
.dl-navtoggle__bars::before,
.dl-navtoggle__bars::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform .25s var(--dl-ease), opacity .2s var(--dl-ease);
}
.dl-navtoggle__bars::before { top: 2px; }
.dl-navtoggle__bars::after { bottom: 2px; }
.dl-navtoggle[aria-expanded="true"] .dl-navtoggle__bars::before { transform: translateY(4px) rotate(45deg); }
.dl-navtoggle[aria-expanded="true"] .dl-navtoggle__bars::after { transform: translateY(-4px) rotate(-45deg); }
.dl-navtoggle__label { line-height: 1; }

/* 7. 页脚 ----------------------------------------------------------------- */
.dl-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 7vw, 110px);
  padding: clamp(48px, 6vw, 84px) 0 26px;
  color: var(--dl-paper);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(30, 74, 61, .85), transparent 58%),
    radial-gradient(80% 60% at 92% 100%, rgba(200, 162, 74, .10), transparent 62%),
    linear-gradient(180deg, var(--dl-ink) 0%, #0A211B 100%);
}
.dl-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(200, 162, 74, .10) 0 1px, transparent 1px 128px),
    repeating-linear-gradient(0deg, rgba(200, 162, 74, .06) 0 1px, transparent 1px 128px);
}
.dl-footer::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--dl-gold), transparent);
}
.dl-footer__shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--dl-shell);
  margin-inline: auto;
  padding-inline: var(--dl-gutter);
}
.dl-footer__masthead {
  display: grid;
  gap: 12px;
  padding-bottom: clamp(22px, 3vw, 36px);
  border-bottom: 1px solid rgba(200, 162, 74, .24);
}
.dl-footer__wordmark {
  font-family: var(--dl-serif);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: .12em;
  color: var(--dl-paper);
}
.dl-footer__wordmark::after {
  content: "";
  display: block;
  width: 68px;
  height: 3px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--dl-gold), rgba(200, 162, 74, 0));
}
.dl-footer__tagline {
  font-size: 13.5px;
  letter-spacing: .06em;
  color: rgba(245, 240, 230, .62);
  max-width: 34em;
}
.dl-footer__serial {
  font-family: var(--dl-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: rgba(200, 162, 74, .78);
}
.dl-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
  padding-block: clamp(26px, 3.4vw, 44px);
  border-bottom: 1px solid rgba(200, 162, 74, .18);
}
.dl-footer__col { min-width: 0; }
.dl-footer__title {
  font-family: var(--dl-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--dl-gold);
  margin-bottom: 14px;
}
.dl-footer__list { display: grid; gap: 9px; }
.dl-footer__link {
  display: inline-block;
  font-size: 14.5px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: rgba(245, 240, 230, .78);
  transition: color .2s var(--dl-ease), transform .2s var(--dl-ease);
}
.dl-footer__link:hover { color: var(--dl-gold-soft); transform: translateX(3px); }
.dl-footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(216px, 1fr));
  align-items: start;
  gap: clamp(16px, 2.4vw, 32px);
  padding-block: clamp(24px, 3vw, 40px);
  border-bottom: 1px solid rgba(200, 162, 74, .18);
}
.dl-footer__contact-item { display: grid; gap: 5px; min-width: 0; }
.dl-footer__key {
  font-family: var(--dl-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: rgba(245, 240, 230, .45);
}
.dl-footer__value {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 240, 230, .9);
  word-break: break-word;
}
.dl-footer__value--mono { font-family: var(--dl-mono); letter-spacing: .04em; color: var(--dl-gold-soft); }
.dl-footer__note {
  grid-column: 1 / -1;
  max-width: 62em;
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(245, 240, 230, .5);
}
.dl-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding-top: clamp(18px, 2.4vw, 28px);
  font-family: var(--dl-mono);
  font-size: 11.5px;
  letter-spacing: .10em;
  color: rgba(245, 240, 230, .42);
}
.dl-footer__icp { color: rgba(200, 162, 74, .82); }
.dl-footer__legal-sep { width: 1px; height: 11px; background: rgba(200, 162, 74, .35); }
.dl-footer__copyright { letter-spacing: .06em; }

/* 8. 按钮 ----------------------------------------------------------------- */
.dl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 24px;
  font-family: var(--dl-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
  line-height: 1.2;
  border-radius: 2px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform .2s var(--dl-ease), background .2s var(--dl-ease), color .2s var(--dl-ease), box-shadow .2s var(--dl-ease);
}
.dl-btn--gold {
  background: linear-gradient(150deg, var(--dl-gold-soft), var(--dl-gold));
  color: #231a05;
  box-shadow: 0 16px 32px -24px rgba(200, 162, 74, .95);
}
.dl-btn--gold:hover { transform: translateY(-2px); }
.dl-btn--ghost {
  border: 1px solid rgba(200, 162, 74, .5);
  background: rgba(200, 162, 74, .07);
  color: var(--dl-gold-soft);
}
.dl-btn--ghost:hover { background: rgba(200, 162, 74, .16); }
.dl-btn--ink { background: var(--dl-ink); color: var(--dl-paper); }
.dl-btn--ink:hover { background: var(--dl-ink-3); }
.dl-btn--line { border: 1px solid var(--dl-line); color: var(--dl-inktext); background: transparent; }
.dl-btn--line:hover { border-color: var(--dl-gold); color: #6f5717; }
.dl-btn--sm { padding: 10px 16px; font-size: 13px; }
.dl-btn:focus-visible { outline: none; box-shadow: inset 0 0 0 2px currentColor; }

/* 9. 面包屑 --------------------------------------------------------------- */
.dl-breadcrumb {
  padding-block: 13px;
  background: var(--dl-paper-2);
  border-bottom: 1px solid var(--dl-line);
}
.dl-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  font-family: var(--dl-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dl-muted);
}
.dl-breadcrumb__link { color: var(--dl-muted); transition: color .2s var(--dl-ease); }
.dl-breadcrumb__link:hover { color: #6f5717; }
.dl-breadcrumb__sep { color: var(--dl-line); }
.dl-breadcrumb__current { color: var(--dl-inktext); }

/* 10. 章节与网格 ---------------------------------------------------------- */
.dl-section { padding-block: clamp(46px, 7vw, 96px); }
.dl-section--dark { background: var(--dl-ink); color: var(--dl-paper); }
.dl-section--paper2 { background: var(--dl-paper-2); }
.dl-section--felt {
  color: var(--dl-paper);
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(30, 74, 61, .9), transparent 60%),
    radial-gradient(80% 60% at 92% 100%, rgba(200, 162, 74, .10), transparent 65%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, .012) 0 2px, transparent 2px 5px),
    var(--dl-ink);
}
.dl-section__head { display: grid; gap: 12px; margin-bottom: clamp(24px, 3vw, 42px); }
.dl-section__num {
  font-family: var(--dl-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--dl-gold);
}
.dl-section__title { font-size: clamp(24px, 3.2vw, 40px); }
.dl-section__lead {
  max-width: 36em;
  font-size: 15px;
  color: var(--dl-muted);
}
.dl-section--dark .dl-section__lead,
.dl-section--felt .dl-section__lead { color: rgba(245, 240, 230, .72); }

.dl-grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.dl-grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.dl-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.dl-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.dl-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.dl-col-4 { grid-column: span 4; }
.dl-col-6 { grid-column: span 6; }
.dl-col-8 { grid-column: span 8; }
.dl-col-12 { grid-column: span 12; }

/* 11. 标签 · 面板 · 数字锚点 --------------------------------------------- */
.dl-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .08em;
  line-height: 1.5;
  color: var(--dl-muted);
  border: 1px solid var(--dl-line);
  background: rgba(255, 255, 255, .35);
}
.dl-label--gold { color: #7d6318; border-color: rgba(200, 162, 74, .65); background: rgba(200, 162, 74, .10); }
.dl-label--cinnabar { color: var(--dl-cinnabar); border-color: rgba(166, 52, 43, .5); background: rgba(166, 52, 43, .06); }
.dl-section--dark .dl-label,
.dl-section--felt .dl-label {
  color: rgba(245, 240, 230, .74);
  border-color: rgba(200, 162, 74, .35);
  background: rgba(200, 162, 74, .07);
}

.dl-panel {
  position: relative;
  padding: clamp(20px, 2.6vw, 32px);
  background: var(--dl-paper);
  box-shadow: inset 0 0 0 1px var(--dl-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--dl-cut)), calc(100% - var(--dl-cut)) 100%, 0 100%);
}
.dl-panel--dark {
  color: var(--dl-paper);
  background: linear-gradient(160deg, var(--dl-ink-2), var(--dl-ink));
  box-shadow: inset 0 0 0 1px var(--dl-line-gold);
}
.dl-panel--ghost { background: transparent; box-shadow: inset 0 0 0 1px var(--dl-line); }
.dl-panel--paper2 { background: var(--dl-paper-2); }

.dl-anchor-num {
  display: block;
  font-family: var(--dl-mono);
  font-size: clamp(42px, 7vw, 86px);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--dl-gold);
}
.dl-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--dl-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--dl-muted);
  border: 1px solid var(--dl-line);
}
.dl-tag--gold { color: var(--dl-gold); border-color: rgba(200, 162, 74, .5); }
.dl-tag--status { color: var(--dl-cinnabar); border-color: rgba(166, 52, 43, .45); }

/* 12. 装饰 · 背景 --------------------------------------------------------- */
.dl-rule { height: 1px; margin-block: clamp(26px, 4vw, 54px); background: var(--dl-line); }
.dl-rule--skew {
  height: 1px;
  transform: rotate(-1.6deg);
  background: linear-gradient(90deg, transparent, var(--dl-gold), transparent);
}
.dl-blueprint { position: relative; }
.dl-blueprint::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image: linear-gradient(to right, rgba(201, 194, 178, .38) 1px, transparent 1px);
  background-size: clamp(58px, 9vw, 110px) 100%;
}
.dl-felt {
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(30, 74, 61, .9), transparent 60%),
    radial-gradient(80% 60% at 90% 100%, rgba(200, 162, 74, .10), transparent 65%),
    var(--dl-ink);
}
.dl-paper-texture {
  background-color: var(--dl-paper);
  background-image: radial-gradient(rgba(27, 27, 24, .05) 1px, transparent 1px);
  background-size: 3px 3px;
}

/* 13. 章节索引 ------------------------------------------------------------ */
.dl-index {
  position: sticky;
  top: 112px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 16px;
  border-left: 1px solid var(--dl-line);
}
.dl-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--dl-muted);
  transition: color .2s var(--dl-ease);
}
.dl-index__link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--dl-gold);
  transition: width .25s var(--dl-ease);
}
.dl-index__link:hover { color: var(--dl-inktext); }
.dl-index__link[aria-current="true"] { color: var(--dl-inktext); }
.dl-index__link[aria-current="true"]::before { width: 14px; }
.dl-index__num { font-family: var(--dl-mono); font-size: 11px; color: var(--dl-gold); }

/* 14. 折叠条 -------------------------------------------------------------- */
.dl-fold { border-top: 1px solid var(--dl-line); }
.dl-fold:last-child { border-bottom: 1px solid var(--dl-line); }
.dl-fold__trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  padding: 17px 0;
  text-align: left;
  font-family: var(--dl-serif);
  font-weight: 900;
  font-size: 16.5px;
  line-height: 1.5;
  color: var(--dl-inktext);
}
.dl-fold__trigger::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--dl-mono);
  font-size: 15px;
  color: var(--dl-gold);
}
.dl-fold__trigger[aria-expanded="true"]::after { content: "－"; }
.dl-fold__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .3s var(--dl-ease);
}
.dl-fold__panel[data-open="true"] { grid-template-rows: 1fr; }
.dl-fold__inner { overflow: hidden; }
.dl-fold__body {
  max-width: 38em;
  padding-bottom: 20px;
  font-size: 14.5px;
  color: var(--dl-muted);
}

/* 15. 筛选 ---------------------------------------------------------------- */
.dl-filter { display: flex; flex-wrap: wrap; gap: 8px; }
.dl-filter__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--dl-muted);
  border: 1px solid var(--dl-line);
  background: rgba(255, 255, 255, .45);
  transition: color .2s var(--dl-ease), border-color .2s var(--dl-ease), background .2s var(--dl-ease);
}
.dl-filter__btn:hover { border-color: var(--dl-gold); color: var(--dl-inktext); }
.dl-filter__btn[aria-pressed="true"] {
  color: var(--dl-inktext);
  border-color: var(--dl-gold);
  background: rgba(200, 162, 74, .16);
}
.dl-filter__count { font-family: var(--dl-mono); font-size: 11px; color: var(--dl-gold); }
.dl-filter-status { font-size: 12.5px; color: var(--dl-muted); letter-spacing: .04em; }
.dl-filter-item--in { animation: dl-fade .28s var(--dl-ease) both; }
@keyframes dl-fade { from { opacity: 0; } to { opacity: 1; } }

/* 16. 双栏切换 ------------------------------------------------------------ */
.dl-tabs {
  display: inline-flex;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--dl-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .5);
}
.dl-tab {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--dl-muted);
  transition: color .2s var(--dl-ease), background .2s var(--dl-ease);
}
.dl-tab[aria-selected="true"] { background: var(--dl-ink); color: var(--dl-paper); }
.dl-tabpanel { padding-top: 18px; }
.dl-tabpanel:focus-visible { outline: 2px solid var(--dl-gold-soft); outline-offset: 6px; }

/* 17. 图片容器 ------------------------------------------------------------ */
.dl-figure { display: flex; flex-direction: column; gap: 10px; margin: 0; }
.dl-figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(150deg, var(--dl-ink-3), var(--dl-ink-2) 55%, var(--dl-ink));
  box-shadow: inset 0 0 0 1px var(--dl-line-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.dl-figure__frame--wide { aspect-ratio: 21 / 9; }
.dl-figure__frame--tall { aspect-ratio: 4 / 5; }
.dl-figure__frame--square { aspect-ratio: 1 / 1; }
.dl-figure__frame--empty::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(200, 162, 74, .12) 0 1px, transparent 1px 12px);
}
.dl-figure__img { width: 100%; height: 100%; object-fit: cover; }
.dl-figure__caption {
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--dl-muted);
}
.dl-figure__caption .dl-mono { color: var(--dl-gold); }
.dl-media { position: relative; overflow: hidden; }
.dl-media img { width: 100%; height: 100%; object-fit: cover; }

/* 18. 显现与返回顶部 ------------------------------------------------------ */
.dl-reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s var(--dl-ease), transform .6s var(--dl-ease);
}
.dl-reveal[data-revealed="true"] { opacity: 1; transform: none; }
.dl-totop {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 90;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: var(--dl-gold-soft);
  background: linear-gradient(160deg, var(--dl-ink-3), var(--dl-ink));
  box-shadow: inset 0 0 0 1px rgba(200, 162, 74, .45), 0 22px 40px -26px rgba(0, 0, 0, .9);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s var(--dl-ease), transform .25s var(--dl-ease), visibility .25s;
}
.dl-totop[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }

/* 19. 平板 --------------------------------------------------------------- */
@media (max-width: 1100px) {
  .dl-brand__tagline { display: none; }
  .dl-nav__link { padding: 8px 12px; font-size: 13.5px; letter-spacing: .06em; }
  .dl-phase { padding: 6px 11px; }
}
@media (max-width: 980px) {
  :root { --dl-header-h: 68px; }
  .dl-header { padding: 11px 0 12px; }
  .dl-header[data-scrolled="true"] { padding: 8px 0 9px; }
  .dl-header__shell { gap: 10px; }
  .dl-navtoggle { display: inline-flex; order: 3; }
  .dl-brand { order: 1; }
  .dl-phase { order: 2; margin-left: auto; }
  .dl-phase__label { display: none; }
  .dl-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--dl-gutter);
    right: var(--dl-gutter);
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    border-radius: 20px;
    background: linear-gradient(180deg, var(--dl-ink-2), var(--dl-ink));
    box-shadow: inset 0 0 0 1px rgba(200, 162, 74, .32), 0 34px 60px -34px rgba(0, 0, 0, .95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(.985);
    transition: opacity .24s var(--dl-ease), transform .24s var(--dl-ease), visibility .24s;
  }
  .dl-nav[data-open="true"] { opacity: 1; visibility: visible; transform: none; }
  .dl-nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .dl-nav__link {
    padding: 13px 16px;
    border-radius: 12px;
    font-size: 15px;
    letter-spacing: .06em;
    border-bottom: 1px solid rgba(201, 194, 178, .12);
  }
  .dl-nav__item:last-child .dl-nav__link { border-bottom: 0; }
  .dl-nav__foot {
    display: block;
    margin-top: 12px;
    padding-top: 14px;
    border-top: 1px solid rgba(200, 162, 74, .22);
  }
  .dl-footer__cols { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
  .dl-footer__link { font-size: 14px; }
}
@media (max-width: 900px) {
  .dl-grid--3, .dl-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dl-col-4, .dl-col-8 { grid-column: span 12; }
  .dl-index { position: static; border-left: 0; padding-left: 0; }
}

/* 20. 手机 --------------------------------------------------------------- */
@media (max-width: 640px) {
  body { font-size: 15px; line-height: 1.8; }
  p { max-width: none; }
  .dl-phase { display: none; }
  .dl-brand__name { font-size: 17px; }
  .dl-brand__mark { width: 34px; height: 34px; font-size: 17px; }
  .dl-grid--2, .dl-grid--3, .dl-grid--4, .dl-grid--12 { grid-template-columns: minmax(0, 1fr); }
  .dl-col-4, .dl-col-6, .dl-col-8 { grid-column: span 1; }
  .dl-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dl-footer__legal { gap: 8px 12px; font-size: 11px; }
  .dl-figure__frame { aspect-ratio: 4 / 3; }
  .dl-tabs { width: 100%; justify-content: space-between; }
  .dl-tab { flex: 1 1 auto; text-align: center; padding: 8px 12px; }
}
@media (max-width: 420px) {
  .dl-footer__cols { grid-template-columns: minmax(0, 1fr); }
  .dl-navtoggle__label { display: none; }
}

/* 21. 降低动效 ----------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .dl-reveal { opacity: 1; transform: none; }
  .dl-phase__dot { animation: none; }
  .dl-rule--skew { transform: none; }
}