/* ============================================================
   FDE事务所 — 组件库 / Components
   版本：V4.0
   依据：V4.0 资源包 components.css + 本项目扩展
   ============================================================ */

/* ============================================================
   1. 按钮 / Buttons
   ============================================================ */
.fde-btn {
  min-height: 52px;
  padding: 0 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  border: 1px solid var(--fde-line-dark);
  border-radius: var(--radius-1);
  color: var(--fde-white);
  background: rgba(5, 5, 5, 0.38);
  font: 500 15px/1 var(--fde-font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease,
              border-color 180ms ease, transform 180ms ease;
  white-space: nowrap;
}
.fde-btn::after {
  content: "→";
  font-size: 18px;
  line-height: 1;
  transition: transform 180ms ease;
}
.fde-btn:hover::after { transform: translateX(8px); }
.fde-btn:active { transform: translateY(1px); }
.fde-btn:hover { opacity: 1; }

.fde-btn--primary {
  color: var(--fde-obsidian-950);
  border-color: var(--fde-white);
  background: var(--fde-white);
}
.fde-btn--secondary:hover {
  border-color: var(--fde-silver-light);
  background: rgba(250, 250, 248, 0.06);
}
.fde-btn--ghost {
  background: transparent;
  border-color: var(--fde-line-dark);
}
.fde-btn--sm { min-height: 44px; padding: 0 20px; font-size: 14px; }

/* 暖白底上反色 */
.surface-paper .fde-btn--ghost,
.surface-paper .fde-btn--secondary {
  color: var(--fde-graphite);
  border-color: var(--fde-graphite);
  background: transparent;
}

.fde-section--paper .fde-btn--ghost,
.fde-section--paper .fde-btn--secondary {
  color: var(--fde-graphite);
  border-color: var(--fde-graphite);
  background: transparent;
}
.fde-section--paper .fde-btn--ghost:hover,
.fde-section--paper .fde-btn--secondary:hover {
  color: var(--fde-white);
  background: var(--fde-graphite);
}
.surface-paper .fde-btn--ghost:hover,
.surface-paper .fde-btn--secondary:hover {
  background: var(--fde-graphite);
  color: var(--fde-white);
}

/* ============================================================
   2. Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding-block: 22px;
  background: linear-gradient(180deg, rgba(5,5,5,0.62) 0%, rgba(5,5,5,0) 100%);
  transition: background var(--dur-base) var(--ease-out);
}
.site-header.is-condensed {
  background: rgba(5,5,5,0.92);
  border-bottom: var(--hairline) solid var(--fde-line-dark);
}

.fde-wordmark {
  display: inline-flex;
  align-items: center;
  height: 24px;
}
.fde-wordmark svg, .fde-wordmark img {
  height: 24px;
  width: auto;
}
.fde-wordmark--light svg, .fde-wordmark--light img { color: var(--fde-white); fill: var(--fde-white); }
.fde-wordmark--dark svg, .fde-wordmark--dark img { color: var(--fde-graphite); fill: var(--fde-graphite); }

.nav-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-9);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  justify-content: center;
}
.nav-list a {
  font-size: var(--fs-nav);
  color: var(--fde-white);
  font-weight: var(--fw-medium);
  position: relative;
  padding-block: 6px;
  letter-spacing: 0.02em;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav-list a:hover::after { transform: scaleX(1); }
.nav-list a.is-active::after { transform: scaleX(1); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.nav-actions .fde-btn {
  min-height: 44px;
  padding: 0 22px;
  font-size: 14px;
}
.nav-actions .fde-btn::after { font-size: 16px; }

/* 移动菜单按钮 */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--fde-white);
  transition: transform var(--dur-base) var(--ease-out),
              opacity var(--dur-base) var(--ease-out);
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   3. 全屏移动菜单
   ============================================================ */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  background: var(--fde-obsidian-950);
  z-index: var(--z-menu);
  padding: 96px var(--fde-gutter) 40px;
  display: flex;
  flex-direction: column;
  gap: var(--space-9);
  transform: translateY(-100%);
  transition: transform var(--dur-slow) var(--ease-in-out);
  overflow-y: auto;
}
.fullscreen-menu.is-open { transform: translateY(0); }
.fullscreen-menu h4 {
  font-family: var(--fde-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fde-muted);
  margin-bottom: var(--space-5);
  font-weight: var(--fw-medium);
}
.fullscreen-menu .menu-section { display: flex; flex-direction: column; gap: 12px; }
.fullscreen-menu .menu-list { display: flex; flex-direction: column; gap: var(--space-5); }
.fullscreen-menu .menu-list a {
  font-size: clamp(28px, 7vw, 40px);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-tight, -0.01em);
  color: var(--fde-white);
}
.fullscreen-menu .menu-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: auto;
  padding-top: var(--space-9);
  border-top: var(--hairline) solid var(--fde-line-dark);
}
.fullscreen-menu .menu-actions .fde-btn { width: 100%; }

@media (max-width: 960px) {
  .nav-list { display: none; }
  .nav-actions > .fde-btn { display: none; }
  .menu-toggle { display: flex; }
}
@media (min-width: 961px) {
  .fullscreen-menu { display: none; }
}

/* ============================================================
   4. Footer
   ============================================================ */
.site-footer {
  background: var(--fde-black);
  color: var(--fde-titanium);
  padding-block: 80px 40px;
  border-top: var(--hairline) solid var(--fde-line-dark);
}
.site-footer .fde-container {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-9);
  align-items: start;
}
.site-footer .foot-brand p {
  margin-top: var(--space-5);
  max-width: 320px;
  font-size: 14px;
  color: var(--fde-muted);
  line-height: 1.7;
}
.site-footer h5 {
  font-family: var(--fde-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fde-muted);
  margin-bottom: var(--space-5);
  font-weight: var(--fw-medium);
}
.site-footer ul { display: flex; flex-direction: column; gap: 12px; }
.site-footer a { font-size: 14px; color: var(--fde-titanium); }
.site-footer a:hover { color: var(--fde-white); opacity: 1; }

.site-footer .foot-legal {
  grid-column: 1 / -1;
  margin-top: var(--space-9);
  padding-top: var(--space-7);
  border-top: var(--hairline) solid var(--fde-line-dark);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-7);
  justify-content: space-between;
  font-size: 12px;
  color: var(--fde-muted);
  letter-spacing: 0.02em;
  line-height: 1.7;
}
.site-footer .foot-legal p { max-width: 720px; font-size: 12px; color: var(--fde-muted); }

@media (max-width: 720px) {
  .site-footer .fde-container { grid-template-columns: 1fr 1fr; }
  .site-footer .foot-brand { grid-column: 1 / -1; }
}

/* ============================================================
   5. Hero（含真实图片）
   ============================================================ */
.fde-hero {
  position: relative;
  min-height: 82svh;
  overflow: clip;
  isolation: isolate;
  background: var(--fde-obsidian-950);
}
.fde-hero--home { min-height: 100svh; }

.fde-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
  display: block;
}
.fde-hero__media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: var(--fde-hero-position, 50% 50%);
}

/* 文字可读性：左侧压暗遮罩 */
.fde-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(90deg,
    rgba(5, 5, 5, 0.96) 0%,
    rgba(5, 5, 5, 0.90) 44%,
    rgba(5, 5, 5, 0.58) 68%,
    rgba(5, 5, 5, 0.18) 84%,
    transparent 100%);
}

.fde-hero__content {
  width: min(820px, 84vw);
  padding-block: clamp(144px, 18vh, 240px) 88px;
}
.fde-hero__content .fde-lead {
  max-width: 720px;
  color: #D5D5D2;
}

.fde-eyebrow {
  font-family: var(--fde-font-mono);
  font-size: var(--fs-eyebrow);
  line-height: 1.5;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fde-titanium);
  font-weight: var(--fw-medium);
}

.fde-h1 {
  margin: 24px 0;
  font-family: var(--fde-font-display);
  font-size: var(--fs-hero);
  font-weight: 520;
  line-height: var(--lh-tight);
  letter-spacing: -0.045em;
  text-wrap: balance;
  color: var(--fde-white);
}
.fde-h1--inner { font-size: var(--fs-h1); }

.fde-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
  align-items: center;
}

.fde-hero__note {
  margin-top: 32px;
  font-size: 13px;
  color: var(--fde-muted);
  letter-spacing: 0.02em;
}

@media (max-width: 767px) {
  .fde-hero { min-height: 82svh; }
  .fde-hero--home { min-height: 100svh; }
  .fde-hero::before {
    background: linear-gradient(90deg,
      rgba(5, 5, 5, 0.97) 0%,
      rgba(5, 5, 5, 0.93) 58%,
      rgba(5, 5, 5, 0.72) 80%,
      rgba(5, 5, 5, 0.38) 100%);
  }
  .fde-hero__content {
    width: min(86vw, 560px);
    padding-block: 128px 64px;
  }
  .fde-h1 { font-size: 42px; line-height: 1.05; }
  .fde-h1--inner { font-size: 36px; line-height: 1.08; }
  .fde-hero:not(.fde-hero--home) { min-height: 88svh; }
  .fde-hero:not(.fde-hero--home) .fde-hero__media {
    inset: auto 0 0;
    height: 56%;
  }
  .fde-hero:not(.fde-hero--home)::before {
    background: linear-gradient(180deg,
      rgba(5, 5, 5, 0.98) 0%,
      rgba(5, 5, 5, 0.92) 44%,
      rgba(5, 5, 5, 0.18) 76%,
      transparent 100%);
  }
  .fde-hero:not(.fde-hero--home) .fde-hero__content {
    padding-block: 112px 50svh;
  }
  .fde-actions { flex-direction: column; align-items: stretch; }
  .fde-btn { width: 100%; justify-content: space-between; }
}

/* ============================================================
   6. Section
   ============================================================ */
.fde-section {
  padding-block: var(--fde-section-space);
  position: relative;
}
.fde-section--paper {
  background: var(--fde-paper);
  color: var(--fde-graphite);
}
.fde-section--stone {
  background: var(--fde-black);
  color: var(--fde-white);
}

.fde-section__head {
  max-width: 880px;
  margin-bottom: 56px;
}

.fde-h2 {
  font-size: var(--fs-h2);
  line-height: 1.18;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: inherit;
  margin-top: 24px;
}
.fde-h3 {
  font-size: var(--fs-h3);
  line-height: 1.25;
  font-weight: 500;
  color: inherit;
}
.fde-h4 {
  font-size: var(--fs-h4);
  line-height: 1.3;
  font-weight: 500;
  color: inherit;
}

/* ============================================================
   7. 网格工具
   ============================================================ */
.fde-cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.fde-cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; }
.fde-cols-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.fde-cols-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }

@media (max-width: 960px) {
  .fde-cols-3, .fde-cols-4, .fde-cols-5 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .fde-cols-2, .fde-cols-3, .fde-cols-4, .fde-cols-5 { grid-template-columns: 1fr; }
}

/* ============================================================
   8. Card
   ============================================================ */
.fde-card {
  border: 1px solid var(--fde-line-light);
  border-radius: var(--radius-1);
  background: rgba(250, 250, 248, 0.42);
}
.fde-card--dark {
  border-color: var(--fde-line-dark);
  background: var(--fde-black-stone);
}
.fde-card__body { padding: 32px 28px; }

/* ============================================================
   9. 4 项保障（首页 + 交付保障页）
   ============================================================ */
.fde-assurance {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
}
.fde-assurance__item {
  padding: 40px 32px;
  border-right: 1px solid var(--fde-line-light);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.fde-assurance__item:last-child { border-right: 0; }
.fde-assurance__item h3 {
  font-size: 19px;
  font-weight: 500;
  color: var(--fde-graphite);
}
.fde-assurance__item p {
  font-size: 14px;
  line-height: 1.7;
  color: #3A3A3B;
}

@media (max-width: 960px) {
  .fde-assurance { grid-template-columns: 1fr 1fr; }
  .fde-assurance__item:nth-child(2n) { border-right: 0; }
  .fde-assurance__item:nth-child(n+3) { border-top: 1px solid var(--fde-line-light); }
}
@media (max-width: 640px) {
  .fde-assurance { grid-template-columns: 1fr; }
  .fde-assurance__item { border-right: 0; border-top: 1px solid var(--fde-line-light); }
  .fde-assurance__item:first-child { border-top: 0; }
}

/* 深色版本 */
.fde-assurance--dark { border-color: var(--fde-line-dark); }
.fde-assurance--dark .fde-assurance__item { border-color: var(--fde-line-dark); }
.fde-assurance--dark .fde-assurance__item h3 { color: var(--fde-white); }
.fde-assurance--dark .fde-assurance__item p { color: var(--fde-titanium); }

/* ============================================================
   10. 直接回答（用于交付保障页 H1 下方）
   ============================================================ */
.fde-direct-answer {
  max-width: 880px;
}
.fde-direct-answer p {
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.7;
  color: inherit;
  max-width: 100%;
}

/* ============================================================
   11. 6 步流程（首页）
   ============================================================ */
.fde-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
}
.fde-flow__item {
  padding: 36px 28px;
  border-right: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.fde-flow__item:nth-child(3n) { border-right: 0; }
.fde-flow__item:nth-last-child(-n+3) { border-bottom: 0; }
.fde-flow__item .num {
  font-family: var(--fde-font-mono);
  font-size: 13px;
  color: var(--fde-muted);
  letter-spacing: 0.04em;
}
.fde-flow__item h4 { font-size: 17px; font-weight: 500; color: var(--fde-graphite); }
.fde-flow__item p { font-size: 14px; line-height: 1.7; color: #3A3A3B; }

@media (max-width: 960px) {
  .fde-flow { grid-template-columns: 1fr 1fr; }
  .fde-flow__item { border-right: 1px solid var(--fde-line-light); }
  .fde-flow__item:nth-child(3n) { border-right: 1px solid var(--fde-line-light); }
  .fde-flow__item:nth-child(2n) { border-right: 0; }
  .fde-flow__item:nth-last-child(-n+3) { border-bottom: 1px solid var(--fde-line-light); }
  .fde-flow__item:nth-last-child(-n+2) { border-bottom: 0; }
}
@media (max-width: 640px) {
  .fde-flow { grid-template-columns: 1fr; }
  .fde-flow__item { border-right: 0; border-bottom: 1px solid var(--fde-line-light); }
  .fde-flow__item:last-child { border-bottom: 0; }
}

/* ============================================================
   12. 4 步诊断流程（诊断页）
   ============================================================ */
.fde-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid var(--fde-line-light);
  padding-bottom: 24px;
  margin-bottom: 48px;
}
.fde-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 14px;
  font-size: 14px;
  color: #3A3A3B;
  position: relative;
}
.fde-step .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--fde-graphite);
  border-radius: 50%;
  font-family: var(--fde-font-mono);
  font-size: 12px;
  background: var(--fde-white);
  color: var(--fde-graphite);
}
.fde-step.is-current { color: var(--fde-graphite); font-weight: 500; }
.fde-step.is-current .num { background: var(--fde-graphite); color: var(--fde-white); }
.fde-step-divider {
  flex: 0 0 auto;
  width: 28px;
  height: 1px;
  background: var(--fde-line-light-strong);
}

/* ============================================================
   13. 实践档案行（列表 + 详情都用）
   ============================================================ */
.fde-archive {
  width: 100%;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
}
.fde-archive__head,
.fde-archive__row {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.6fr 1.6fr 60px;
  align-items: center;
  gap: 32px;
  padding-block: 28px;
}
.fde-archive__head {
  border-bottom: 1px solid var(--fde-line-light);
  font-family: var(--fde-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6E6F70;
  font-weight: 500;
  padding-block: 20px;
}
.fde-archive__row {
  border-bottom: 1px solid var(--fde-line-light);
  color: var(--fde-graphite);
  transition: background 180ms ease;
}
.fde-archive__row:last-child { border-bottom: 0; }
.fde-archive__row a { display: block; color: var(--fde-graphite); }
.fde-archive__row .title { font-size: 17px; font-weight: 500; }
.fde-archive__row .empty { color: #8C8F92; }
.fde-archive__row .arrow { text-align: right; font-size: 18px; transition: transform 180ms ease; }
.fde-archive__row:hover { background: rgba(0,0,0,0.02); }
.fde-archive__row:hover a { opacity: 1; }
.fde-archive__row:hover .arrow { transform: translateX(6px); }

.fde-section--paper .fde-archive,
.fde-section--paper .fde-archive__head,
.fde-section--paper .fde-archive__row {
  border-color: var(--fde-line-light-strong);
}
.fde-section--paper .fde-archive__row { color: #2A2A2B; }
.fde-section--paper .fde-archive__row a { color: var(--fde-graphite); }

.fde-section--stone .fde-archive,
.fde-section--stone .fde-archive__head,
.fde-section--stone .fde-archive__row {
  border-color: var(--fde-line-dark);
}
.fde-section--stone .fde-archive__head { color: var(--fde-titanium); }
.fde-section--stone .fde-archive__row { color: var(--fde-titanium); }
.fde-section--stone .fde-archive__row a,
.fde-section--stone .fde-archive__row .title { color: var(--fde-white); }
.fde-section--stone .fde-archive__row:hover { background: rgba(255,255,255,0.04); }

@media (max-width: 720px) {
  .fde-archive__head { display: none; }
  .fde-archive__row { grid-template-columns: 1fr; gap: 12px; padding-block: 20px; }
  .fde-archive__row .arrow { text-align: left; }
}

/* ============================================================
   14. 实践详情证据表
   ============================================================ */
.fde-evidence {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--fde-line-light-strong);
  background: var(--fde-paper);
  margin-top: 64px;
}
.fde-evidence__cell {
  padding: 28px 24px;
  border-right: 1px solid var(--fde-line-light-strong);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.fde-evidence__cell:last-child { border-right: 0; }
.fde-evidence__label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--fde-graphite);
}
.fde-evidence__label svg { width: 18px; height: 18px; color: #6E6F70; }
.fde-evidence__body { font-size: 14px; line-height: 1.8; color: #3A3A3B; }

@media (max-width: 960px) {
  .fde-evidence { grid-template-columns: 1fr 1fr; }
  .fde-evidence__cell { border-right: 1px solid var(--fde-line-light-strong); }
  .fde-evidence__cell:nth-child(2n) { border-right: 0; }
  .fde-evidence__cell:nth-child(n+3) { border-top: 1px solid var(--fde-line-light-strong); }
}
@media (max-width: 640px) {
  .fde-evidence { grid-template-columns: 1fr; }
  .fde-evidence__cell { border-right: 0; border-top: 1px solid var(--fde-line-light-strong); }
  .fde-evidence__cell:first-child { border-top: 0; }
}

/* ============================================================
   15. 表单
   ============================================================ */
.fde-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 32px;
}
.fde-form .full { grid-column: 1 / -1; }

.fde-field { display: flex; flex-direction: column; gap: 8px; }
.fde-field label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--fde-graphite);
  font-weight: 500;
}
.fde-field label .req { color: #B00020; margin-left: 2px; }
.fde-field input,
.fde-field textarea,
.fde-field select {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  background: var(--fde-white);
  border: 1px solid var(--fde-line-light-strong);
  border-radius: var(--radius-1);
  font-size: 15px;
  color: var(--fde-graphite);
  transition: border-color 180ms ease;
  font-family: inherit;
}
.fde-field textarea {
  height: auto;
  min-height: 120px;
  padding: 14px;
  resize: vertical;
}
.fde-field input:focus,
.fde-field textarea:focus,
.fde-field select:focus {
  outline: 0;
  border-color: var(--fde-graphite);
}
.fde-field .hint { font-size: 12px; color: #6E6F70; }

.fde-check { display: flex; align-items: flex-start; gap: 12px; }
.fde-check input {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}
.fde-check label { font-size: 14px; color: #2A2A2B; font-weight: 400; }

@media (max-width: 720px) {
  .fde-form { grid-template-columns: 1fr; }
}

/* Honeypot 隐藏字段（反垃圾） */
.fde-honeypot {
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  opacity: 0;
  pointer-events: none;
}

/* 表单小字与说明 */
.fde-form-note {
  color: var(--fde-muted);
  font-size: 13px;
  line-height: 1.7;
}
.surface-paper .fde-form-note { color: #6E6F70; }

.fde-form-status {
  min-height: 24px;
  margin: 0;
  color: #4F5052;
  font-size: 14px;
  line-height: 1.7;
}
.fde-form-status.is-error { color: #8A1C1C; }
.fde-form [type="submit"][disabled] {
  cursor: wait;
  opacity: 0.7;
}

/* 文章阅读版式（insights） */
.fde-article {
  max-width: 760px;
  margin-inline: auto;
}
.fde-article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--fde-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #6E6F70;
  padding-block: 16px;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
  margin-bottom: 32px;
}
.fde-article__meta strong { color: #1A1A1B; font-weight: 500; }
.fde-article__answer {
  font-size: clamp(18px, 1.7vw, 22px);
  line-height: 1.7;
  color: #1A1A1B;
  font-weight: 500;
  margin-bottom: 48px;
}
.fde-article__body h2 {
  font-size: clamp(20px, 1.9vw, 28px);
  line-height: 1.3;
  font-weight: 500;
  color: #1A1A1B;
  margin-top: 56px;
  margin-bottom: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--fde-line-light);
}
.fde-article__body h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.fde-article__body p,
.fde-article__body li {
  font-size: 16px;
  line-height: 1.85;
  color: #2A2A2B;
  margin-bottom: 18px;
}
.fde-article__body ul,
.fde-article__body ol {
  margin: 0 0 24px 0;
  padding-left: 22px;
  list-style: disc;
}
.fde-article__body ol { list-style: decimal; }
.fde-article__body li { margin-bottom: 8px; }
.fde-article__body strong { color: #1A1A1B; font-weight: 500; }
.fde-article__source {
  margin-top: 64px;
  padding: 24px;
  background: var(--fde-paper-2);
  border: 1px solid var(--fde-line-light-strong);
  font-size: 13px;
  line-height: 1.7;
  color: #3A3A3B;
}
.fde-article__source strong { color: #1A1A1B; }
.fde-article__faq {
  margin-top: 56px;
  border-top: 1px solid var(--fde-line-light);
}
.fde-article__faq details {
  border-bottom: 1px solid var(--fde-line-light);
  padding: 20px 0;
}
.fde-article__faq summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font-size: 17px;
  font-weight: 500;
  color: #1A1A1B;
}
.fde-article__faq summary::-webkit-details-marker { display: none; }
.fde-article__faq summary::after {
  content: "+";
  font-size: 22px;
  color: #6E6F70;
}
.fde-article__faq details[open] summary::after { content: "−"; }
.fde-article__faq .answer {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: #2A2A2B;
}

/* Insights 索引卡片 */
.fde-insight-card {
  padding: 32px;
  border: 1px solid var(--fde-line-light-strong);
  background: var(--fde-paper);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background 180ms ease;
}
.fde-insight-card:hover { background: var(--fde-paper-2); }
.fde-insight-card__cat {
  font-family: var(--fde-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fde-muted-on-paper);
}
.fde-insight-card h3 { font-size: 20px; font-weight: 500; color: #1A1A1B; line-height: 1.35; }
.fde-insight-card p { font-size: 14px; line-height: 1.75; color: #2A2A2B; }
.fde-insight-card__more {
  font-size: 14px;
  color: #1A1A1B;
  border-bottom: 1px solid currentColor;
  align-self: flex-start;
  padding-bottom: 2px;
}

/* ============================================================
   16. FAQ 手风琴
   ============================================================ */
.fde-faq { border-top: 1px solid var(--fde-line-light); }
.fde-faq details {
  border-bottom: 1px solid var(--fde-line-light);
  padding: 28px 0;
}
.fde-faq details > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font-size: 18px;
  font-weight: 500;
  color: var(--fde-graphite);
}
.fde-faq details > summary::-webkit-details-marker { display: none; }
.fde-faq details > summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 400;
  color: #6E6F70;
  transition: transform 180ms ease;
}
.fde-faq details[open] > summary::after { content: "−"; }
.fde-faq details .answer {
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.8;
  color: #2A2A2B;
  max-width: 720px;
}

/* ============================================================
   17. 比较表
   ============================================================ */
.fde-compare {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--fde-line-light-strong);
  background: var(--fde-paper);
  margin-top: 48px;
  font-size: 15px;
}
.fde-compare th,
.fde-compare td {
  padding: 22px 24px;
  text-align: left;
  border-bottom: 1px solid var(--fde-line-light-strong);
  border-right: 1px solid var(--fde-line-light-strong);
  vertical-align: top;
  color: var(--fde-graphite);
  line-height: 1.65;
}
.fde-compare th:last-child, .fde-compare td:last-child { border-right: 0; }
.fde-compare tr:last-child td { border-bottom: 0; }
.fde-compare thead th {
  font-weight: 500;
  font-size: 18px;
  color: var(--fde-graphite);
  background: var(--fde-paper-2);
}
.fde-compare tbody th {
  font-weight: 500;
  background: var(--fde-paper-2);
  width: 160px;
}

@media (max-width: 720px) {
  .fde-compare { font-size: 14px; }
  .fde-compare th, .fde-compare td { padding: 16px 14px; }
}

/* ============================================================
   18. 团队卡片
   ============================================================ */
.fde-team-card {
  display: flex;
  gap: 24px;
  padding: 32px 28px;
  border: 1px solid var(--fde-line-dark);
  background: var(--fde-black-stone);
  color: var(--fde-white);
  align-items: flex-start;
}
.fde-team-card__icon {
  width: 56px;
  height: 56px;
  border: 1px solid var(--fde-line-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--fde-titanium);
}
.fde-team-card__body { display: flex; flex-direction: column; gap: 8px; flex: 1; }
.fde-team-card h3 { font-size: 22px; font-weight: 500; color: var(--fde-white); }
.fde-team-card .org { font-size: 13px; color: var(--fde-titanium); }
.fde-team-card .caps {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--fde-titanium);
  font-size: 14px;
}

/* ============================================================
   19. 状态枚举徽章组
   ============================================================ */
.fde-status-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ============================================================
   20. 版本元信息
   ============================================================ */
.fde-version {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  font-family: var(--fde-font-mono);
  font-size: 12px;
  color: #5F6062;
  letter-spacing: 0.04em;
  padding-block: 20px;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
}
.fde-version strong { color: var(--fde-graphite); font-weight: 500; }

/* ============================================================
   21. 列表步骤（数字+标题+正文）
   ============================================================ */
.fde-steps-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
}
.fde-steps-list__item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--fde-line-light);
  align-items: start;
}
.fde-steps-list__item:last-child { border-bottom: 0; }
.fde-steps-list__item .num {
  font-family: var(--fde-font-mono);
  font-size: 16px;
  color: #6E6F70;
  padding-top: 2px;
}
.fde-steps-list__item h4 { font-size: 17px; color: var(--fde-graphite); font-weight: 500; }
.fde-steps-list__item p { margin-top: 6px; font-size: 14px; line-height: 1.7; color: #2A2A2B; }

/* 深色版 */
.fde-steps-list--dark {
  border-color: var(--fde-line-dark);
}
.fde-steps-list--dark .fde-steps-list__item { border-color: var(--fde-line-dark); }
.fde-steps-list--dark .fde-steps-list__item h4 { color: var(--fde-white); }
.fde-steps-list--dark .fde-steps-list__item p { color: var(--fde-titanium); }
.fde-steps-list--dark .fde-steps-list__item .num { color: var(--fde-muted); }

/* ============================================================
   22. 团队审核流程（5 步）
   ============================================================ */
.fde-review-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--fde-line-light);
  border-bottom: 1px solid var(--fde-line-light);
}
.fde-review-flow__item {
  padding: 32px 24px;
  border-right: 1px solid var(--fde-line-light);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
  align-items: center;
}
.fde-review-flow__item:last-child { border-right: 0; }
.fde-review-flow__item .icon {
  width: 36px;
  height: 36px;
  color: var(--fde-graphite);
}
.fde-review-flow__item h4 { font-size: 14px; color: var(--fde-graphite); font-weight: 500; }

@media (max-width: 960px) {
  .fde-review-flow { grid-template-columns: repeat(3, 1fr); }
  .fde-review-flow__item:nth-child(3n) { border-right: 0; }
  .fde-review-flow__item:nth-child(n+4) { border-top: 1px solid var(--fde-line-light); }
}
@media (max-width: 640px) {
  .fde-review-flow { grid-template-columns: 1fr 1fr; }
  .fde-review-flow__item { border-right: 1px solid var(--fde-line-light); }
  .fde-review-flow__item:nth-child(2n) { border-right: 0; }
  .fde-review-flow__item:nth-child(n+3) { border-top: 1px solid var(--fde-line-light); }
}

/* ============================================================
   23. Entrance row（首页底部双入口条）
   ============================================================ */
.fde-entrance-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--fde-line-dark);
}
.fde-entrance-row a {
  padding: 36px var(--fde-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-family: var(--fde-font-en, var(--fde-font-mono));
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fde-titanium);
}
.fde-entrance-row a + a { border-left: 1px solid var(--fde-line-dark); }
.fde-entrance-row a .arrow {
  display: inline-block;
  width: 80px;
  height: 1px;
  background: currentColor;
  position: relative;
}
.fde-entrance-row a .arrow::after {
  content: "";
  position: absolute;
  right: 0; top: 50%;
  width: 8px; height: 8px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: translateY(-50%) rotate(45deg);
}
.fde-entrance-row a:hover { color: var(--fde-white); opacity: 1; }
.fde-entrance-row a:hover .arrow { transform: translateX(10px); }

@media (max-width: 720px) {
  .fde-entrance-row { grid-template-columns: 1fr; }
  .fde-entrance-row a + a { border-left: 0; border-top: 1px solid var(--fde-line-dark); }
}

/* ============================================================
   24. Final CTA 双大卡
   ============================================================ */
.fde-cta-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--fde-line-dark);
  border-bottom: 1px solid var(--fde-line-dark);
}
.fde-cta-card {
  padding: 80px var(--fde-gutter);
  color: var(--fde-white);
}
.fde-cta-card + .fde-cta-card { border-left: 1px solid var(--fde-line-dark); }
.fde-cta-card h3 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 16px;
}
.fde-cta-card p { color: var(--fde-titanium); margin-bottom: 24px; }

@media (max-width: 960px) {
  .fde-cta-cards { grid-template-columns: 1fr; }
  .fde-cta-card + .fde-cta-card { border-left: 0; border-top: 1px solid var(--fde-line-dark); }
}

/* 紧凑 Hero（诊断/加入页）：高度更短，让表单更快可见 */
.fde-hero--compact {
  min-height: 56svh !important;
  padding: 100px 0 48px;
}
.fde-hero--compact .fde-h1 { font-size: clamp(34px, 4.4vw, 60px); }