/* ==========================================================================
   大发黄金品牌 · 共享样式表 /assets/site.css
   暗场金脉与档案室：墨黑底 + 暖金结构线 + 奶油纸目录
   ========================================================================== */

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

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

body { margin: 0; }

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

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

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

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

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

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

hr { border: 0; }

/* 2. Tokens --------------------------------------------------------------- */
:root {
  /* 色彩 */
  --df-ink-900: #0B0C0E;
  --df-ink-800: #16181C;
  --df-line-700: #23262B;
  --df-brown-850: #1E1712;
  --df-gold-500: #C6A15B;
  --df-amber-400: #E0B96A;
  --df-orange-600: #B4552E;
  --df-ivory-050: #F4EFE6;
  --df-cream-100: #E9E2D5;
  --df-gray-500: #8A8F98;
  --df-metal-300: #6E6555;
  --df-ivory-mute: #B9B2A6;
  --df-ink-on-paper: #15130F;

  /* 字体 */
  --df-font-cn: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --df-font-num: "Inter", "Helvetica Neue", Arial, "PingFang SC", sans-serif;

  /* 度量 */
  --df-max: 1320px;
  --df-pad: 32px;
  --df-gap: 24px;
  --df-header-h: 66px;

  /* 材质 */
  --df-shadow-1: 0 1px 0 rgba(244, 239, 230, 0.03), 0 20px 44px -32px rgba(0, 0, 0, 0.95);
  --df-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --df-gold-line: rgba(198, 161, 91, 0.42);
  --df-hair: rgba(244, 239, 230, 0.08);
}

/* 3. Base typography ------------------------------------------------------ */
body {
  background: var(--df-ink-900);
  color: var(--df-ivory-050);
  font-family: var(--df-font-cn);
  font-size: 15px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

.df-title-xl {
  font-size: clamp(38px, 5.4vw, 76px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.df-title-lg {
  font-size: clamp(27px, 3.3vw, 44px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.df-title-md {
  font-size: clamp(19px, 2.1vw, 26px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.df-title-sm {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
}

.df-lede {
  font-size: 17px;
  line-height: 1.85;
  color: var(--df-ivory-mute);
  letter-spacing: 0.02em;
  max-width: 68ch;
}

.df-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--df-font-num);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--df-gold-500);
}

.df-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--df-gold-500);
  opacity: 0.75;
}

.df-rule {
  height: 1px;
  background: var(--df-line-700);
}

.df-rule--gold {
  background: linear-gradient(90deg, var(--df-gold-500), rgba(198, 161, 91, 0));
}

.df-note {
  padding-left: 16px;
  border-left: 1px solid var(--df-gold-line);
  font-size: 13px;
  line-height: 1.85;
  color: var(--df-gray-500);
}

/* 4. Layout --------------------------------------------------------------- */
.df-shell {
  width: 100%;
  max-width: var(--df-max);
  margin: 0 auto;
  padding-left: var(--df-pad);
  padding-right: var(--df-pad);
}

.df-band { padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(48px, 7vw, 96px); }
.df-band--tight { padding-top: clamp(30px, 4vw, 56px); padding-bottom: clamp(30px, 4vw, 56px); }
.df-band--paper { background: var(--df-cream-100); color: var(--df-ink-on-paper); }
.df-band--ink800 { background: var(--df-ink-800); }

.df-split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: var(--df-gap);
  align-items: start;
}

.df-split--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }
.df-split--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }

.df-panel {
  padding: 28px;
  background: var(--df-ink-800);
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  box-shadow: var(--df-shadow-1);
}

.df-panel--paper {
  background: var(--df-cream-100);
  border-color: #D8CFBC;
  color: var(--df-ink-on-paper);
  box-shadow: 0 24px 44px -34px rgba(0, 0, 0, 0.8);
}

.df-panel--brown {
  background: var(--df-brown-850);
  border-color: #2A2119;
}

/* 5. Buttons & tags ------------------------------------------------------- */
.df-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.2;
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  color: var(--df-ivory-050);
  transition: color 0.18s var(--df-ease), background-color 0.18s var(--df-ease),
              border-color 0.18s var(--df-ease), transform 0.18s var(--df-ease);
}

.df-btn:hover { transform: translateY(-1px); }

.df-btn--gold {
  background: var(--df-gold-500);
  border-color: var(--df-gold-500);
  color: #120F0A;
}

.df-btn--gold:hover { background: var(--df-amber-400); border-color: var(--df-amber-400); }

.df-btn--ghost { background: rgba(244, 239, 230, 0.02); }

.df-btn--ghost:hover {
  border-color: var(--df-gold-line);
  color: var(--df-amber-400);
  background: rgba(198, 161, 91, 0.08);
}

.df-btn--line {
  border-color: transparent;
  border-bottom-color: var(--df-gold-500);
  border-radius: 0;
  padding: 6px 0;
  color: var(--df-gold-500);
}

.df-btn--line:hover { color: var(--df-amber-400); border-bottom-color: var(--df-amber-400); }

.df-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  font-family: var(--df-font-num);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--df-gray-500);
  white-space: nowrap;
}

.df-tag--gold { color: var(--df-gold-500); border-color: var(--df-gold-line); }
.df-tag--hot { color: var(--df-orange-600); border-color: rgba(180, 85, 46, 0.5); }

/* 6. Index rows ----------------------------------------------------------- */
.df-index { border-top: 1px solid var(--df-line-700); }

.df-index__row {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: baseline;
  padding: 18px 4px;
  border-bottom: 1px solid var(--df-line-700);
  transition: background-color 0.18s var(--df-ease);
}

.df-index__row::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--df-gold-500);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.26s var(--df-ease);
}

.df-index__row:hover::after,
.df-index__row:focus-within::after { transform: scaleX(1); }

.df-index__num {
  font-family: var(--df-font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--df-gray-500);
  transition: color 0.18s var(--df-ease);
}

.df-index__row:hover .df-index__num,
.df-index__row:focus-within .df-index__num { color: var(--df-amber-400); }

.df-index__label {
  font-size: 16px;
  font-weight: 600;
  color: var(--df-ivory-050);
  letter-spacing: 0.02em;
}

.df-index__meta {
  font-family: var(--df-font-num);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--df-gray-500);
}

.df-band--paper .df-index,
.df-panel--paper .df-index { border-top-color: rgba(21, 19, 15, 0.16); }

.df-band--paper .df-index__row,
.df-panel--paper .df-index__row { border-bottom-color: rgba(21, 19, 15, 0.14); }

.df-band--paper .df-index__label,
.df-panel--paper .df-index__label { color: var(--df-ink-on-paper); }

.df-band--paper .df-index__num,
.df-panel--paper .df-index__num { color: #8A7F6B; }

.df-band--paper .df-index__row:hover .df-index__num,
.df-panel--paper .df-index__row:hover .df-index__num { color: #8A6B2E; }

/* 7. Accordion ------------------------------------------------------------ */
.df-accordion { border-top: 1px solid var(--df-line-700); }

.df-accordion__item { border-bottom: 1px solid var(--df-line-700); }

.df-accordion__item summary {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 24px;
  gap: 16px;
  align-items: center;
  padding: 20px 4px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  list-style: none;
  transition: color 0.18s var(--df-ease);
}

.df-accordion__item summary::-webkit-details-marker { display: none; }
.df-accordion__item summary:hover { color: var(--df-amber-400); }

.df-accordion__num {
  font-family: var(--df-font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--df-gray-500);
}

.df-accordion__icon {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
}

.df-accordion__icon::before,
.df-accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--df-gold-500);
  transition: transform 0.24s var(--df-ease);
}

.df-accordion__icon::before { left: 0; top: 6.5px; width: 14px; height: 1px; }
.df-accordion__icon::after { left: 6.5px; top: 0; width: 1px; height: 14px; }

.df-accordion__item[open] .df-accordion__icon::after { transform: scaleY(0); }

.df-accordion__body {
  padding: 0 4px 24px 60px;
  font-size: 14.5px;
  color: var(--df-ivory-mute);
  max-width: 72ch;
}

/* 8. Card grid & media ---------------------------------------------------- */
.df-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--df-gap);
}

.df-card {
  padding: 24px;
  background: var(--df-ink-800);
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  transition: border-color 0.2s var(--df-ease), transform 0.2s var(--df-ease),
              background-color 0.2s var(--df-ease);
}

.df-card:hover {
  border-color: var(--df-gold-line);
  transform: translateY(-2px);
  background: #191C21;
}

.df-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  background: linear-gradient(150deg, #23262C 0%, #14161A 46%, #0C0D10 100%);
}

.df-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(198, 161, 91, 0.16) 0%, rgba(198, 161, 91, 0) 44%);
}

.df-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 12, 14, 0) 46%, rgba(11, 12, 14, 0.72) 100%);
}

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

.df-media--tall { aspect-ratio: 3 / 4; }
.df-media--wide { aspect-ratio: 21 / 9; }
.df-media--square { aspect-ratio: 1 / 1; }

.df-media__label {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  font-family: var(--df-font-num);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--df-amber-400);
}

/* 9. Breadcrumb ----------------------------------------------------------- */
.df-breadcrumb {
  font-family: var(--df-font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--df-gray-500);
}

.df-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.df-breadcrumb li { display: inline-flex; align-items: center; }

.df-breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--df-metal-300);
}

.df-breadcrumb a { transition: color 0.18s var(--df-ease); }
.df-breadcrumb a:hover { color: var(--df-amber-400); }

/* 10. Header -------------------------------------------------------------- */
.df-skip {
  position: fixed;
  top: 0;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #120F0A;
  background: var(--df-amber-400);
  border-radius: 0 0 3px 3px;
  transform: translateY(-130%);
  transition: transform 0.18s var(--df-ease);
}

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

.df-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(11, 12, 14, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
  border-bottom: 1px solid var(--df-line-700);
  transition: background-color 0.24s var(--df-ease), box-shadow 0.24s var(--df-ease);
}

.df-header[data-scrolled="true"] {
  background: rgba(11, 12, 14, 0.97);
  box-shadow: 0 20px 44px -38px rgba(0, 0, 0, 1);
}

.df-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--df-gold-500), var(--df-amber-400) 58%, var(--df-orange-600));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
  will-change: transform;
}

.df-header__inner {
  max-width: var(--df-max);
  margin: 0 auto;
  padding: 0 var(--df-pad);
  height: var(--df-header-h);
  display: flex;
  align-items: center;
  gap: 20px;
}

.df-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.df-brand__mark {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  transform: rotate(45deg);
  border-radius: 2px;
  background: linear-gradient(135deg, var(--df-amber-400), var(--df-gold-500) 46%, #7A5F2E);
  box-shadow: 0 0 0 1px rgba(198, 161, 91, 0.35), 0 8px 16px -10px rgba(198, 161, 91, 0.9);
}

.df-brand__text { display: flex; flex-direction: column; line-height: 1.16; }

.df-brand__name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--df-ivory-050);
}

.df-brand__line {
  font-family: var(--df-font-num);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--df-gray-500);
}

.df-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  margin: 0;
}

.df-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.df-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 14px;
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--df-ivory-mute);
  transition: color 0.18s var(--df-ease);
}

.df-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 1px;
  background: var(--df-gold-500);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.26s var(--df-ease), opacity 0.18s var(--df-ease);
}

.df-nav__link:hover { color: var(--df-ivory-050); transform: none; }
.df-nav__link:hover::after { transform: scaleX(1); opacity: 0.45; }

.df-nav__link[aria-current="page"] { color: var(--df-amber-400); }

.df-nav__link[aria-current="page"]::after {
  background: var(--df-amber-400);
  opacity: 1;
  animation: df-underline 0.5s var(--df-ease) both;
}

@keyframes df-underline {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.df-header__actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.df-status {
  font-family: var(--df-font-num);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--df-gray-500);
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  padding: 4px 9px;
  white-space: nowrap;
}

.df-header__cta { padding: 8px 16px; font-size: 12.5px; }

.df-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 11px;
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  color: var(--df-ivory-050);
  transition: border-color 0.18s var(--df-ease), color 0.18s var(--df-ease);
}

.df-navtoggle:hover { border-color: var(--df-gold-line); color: var(--df-amber-400); }

.df-navtoggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 11px;
}

.df-navtoggle__bars span {
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform 0.22s var(--df-ease), opacity 0.22s var(--df-ease);
}

.df-navtoggle__bars span:nth-child(1) { top: 0; }
.df-navtoggle__bars span:nth-child(2) { top: 5px; }
.df-navtoggle__bars span:nth-child(3) { top: 10px; }

.df-navtoggle[aria-expanded="true"] .df-navtoggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.df-navtoggle[aria-expanded="true"] .df-navtoggle__bars span:nth-child(2) { opacity: 0; }
.df-navtoggle[aria-expanded="true"] .df-navtoggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.df-navtoggle__label {
  font-family: var(--df-font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: inherit;
}

/* 11. Footer -------------------------------------------------------------- */
.df-footer {
  position: relative;
  background: var(--df-brown-850);
  border-top: 1px solid var(--df-line-700);
  color: var(--df-ivory-mute);
}

.df-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(198, 161, 91, 0), var(--df-gold-500), rgba(198, 161, 91, 0));
  opacity: 0.55;
}

.df-footer__inner {
  max-width: var(--df-max);
  margin: 0 auto;
  padding: 0 var(--df-pad);
}

.df-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 56px;
  padding: 64px 0 48px;
}

.df-footer__mark {
  width: 16px;
  height: 16px;
  margin-bottom: 18px;
  transform: rotate(45deg);
  border-radius: 2px;
  background: linear-gradient(135deg, var(--df-amber-400), var(--df-gold-500) 50%, #7A5F2E);
}

.df-footer__name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--df-ivory-050);
  margin-bottom: 12px;
}

.df-footer__desc {
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--df-gray-500);
  max-width: 32ch;
}

.df-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.df-footer__title {
  font-family: var(--df-font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--df-gold-500);
  margin-bottom: 16px;
}

.df-footer__list li + li { margin-top: 10px; }

.df-footer__link {
  display: inline-block;
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--df-ivory-mute);
  transition: color 0.18s var(--df-ease), transform 0.18s var(--df-ease);
}

.df-footer__link:hover {
  color: var(--df-amber-400);
  transform: translateX(3px);
}

.df-footer__meta {
  border-top: 1px solid var(--df-hair);
  background: rgba(11, 12, 14, 0.42);
}

.df-footer__meta-inner {
  max-width: var(--df-max);
  margin: 0 auto;
  padding: 20px var(--df-pad) 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  font-size: 12px;
  line-height: 1.8;
  color: var(--df-gray-500);
}

.df-footer__legal { letter-spacing: 0.06em; }

.df-footer__dot {
  display: inline-block;
  margin: 0 8px;
  color: var(--df-metal-300);
}

.df-footer__contact { letter-spacing: 0.02em; }

.df-footer__copy {
  margin-left: auto;
  font-family: var(--df-font-num);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* 12. Back to top --------------------------------------------------------- */
.df-totop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--df-ivory-050);
  background: rgba(22, 24, 28, 0.92);
  border: 1px solid var(--df-line-700);
  border-radius: 2px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 24px 44px -32px rgba(0, 0, 0, 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.22s var(--df-ease), transform 0.22s var(--df-ease),
              visibility 0s linear 0.22s, color 0.18s var(--df-ease),
              border-color 0.18s var(--df-ease);
}

.df-totop[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s, 0s, 0s, 0s, 0s;
}

.df-totop:hover { color: var(--df-amber-400); border-color: var(--df-gold-line); }

/* 13. Reveal protocol ----------------------------------------------------- */
.df-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--df-ease), transform 0.5s var(--df-ease);
}

.df-js [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* 14. Focus --------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--df-amber-400);
  outline-offset: 3px;
  border-radius: 2px;
}

/* 15. Responsive ---------------------------------------------------------- */
@media (max-width: 1200px) {
  :root { --df-pad: 28px; }
}

@media (max-width: 1023px) {
  :root { --df-pad: 24px; --df-gap: 20px; }

  .df-split,
  .df-split--4-8,
  .df-split--8-4 {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .df-navtoggle { display: inline-flex; }
  .df-header__cta { display: none; }

  .df-nav {
    position: fixed;
    top: var(--df-header-h);
    left: 0;
    right: 0;
    bottom: 0;
    display: block;
    flex: 0 0 auto;
    padding: 20px var(--df-pad) 64px;
    background: var(--df-ink-900);
    border-top: 1px solid var(--df-line-700);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 0.3s var(--df-ease), visibility 0s linear 0.3s;
  }

  .df-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.3s var(--df-ease), visibility 0s linear 0s;
  }

  .df-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .df-nav__link {
    display: block;
    padding: 16px 2px;
    font-size: 17px;
    border-bottom: 1px solid var(--df-line-700);
  }

  .df-nav__link::after {
    left: 2px;
    right: auto;
    width: 32px;
    bottom: 10px;
  }

  .df-footer__top {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    padding: 48px 0 36px;
  }

  .df-footer__desc { max-width: 48ch; }
}

@media (max-width: 767px) {
  :root { --df-pad: 18px; }

  body { font-size: 14.5px; }

  .df-status { display: none; }

  .df-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 20px; }

  .df-footer__meta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-bottom: 24px;
  }

  .df-footer__copy { margin-left: 0; }

  .df-index__row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 6px 12px;
    padding: 16px 2px;
  }

  .df-index__meta { grid-column: 2; }

  .df-accordion__item summary {
    grid-template-columns: 32px minmax(0, 1fr) 20px;
    gap: 12px;
    font-size: 15px;
  }

  .df-accordion__body { padding: 0 4px 20px 44px; }

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

  .df-totop { right: 16px; bottom: 16px; }
}

/* 16. Reduced motion ------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .df-btn:hover,
  .df-card:hover,
  .df-footer__link:hover { transform: none; }
}