/* ============================================================
   财神到指南 · 共享站点样式 /assets/site.css
   纸张叠层 · 价目签 · 印章 · 长江波纹
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
html { -webkit-text-size-adjust: 100%; }

/* ---------- 变量 ---------- */
:root {
  --csd-red: #C62828;
  --csd-red-deep: #7F1018;
  --csd-gold: #D4A24C;
  --csd-gold-light: #F3D9A4;
  --csd-green: #123B32;
  --csd-ink-deep: #081F1A;
  --csd-ivory: #F8F1E4;
  --csd-paper: #E8DDCB;
  --csd-ink: #1A1713;
  --csd-state: #2E6B54;
  --csd-amber: #B5651D;

  --csd-shell: 1220px;
  --csd-gutter: clamp(18px, 4vw, 56px);
  --csd-radius: 2px;

  --csd-serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --csd-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", system-ui, sans-serif;
  --csd-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --csd-line: rgba(26, 23, 19, 0.14);
  --csd-line-gold: rgba(212, 162, 76, 0.5);
  --csd-shadow: 0 18px 40px -30px rgba(8, 31, 26, 0.6);
}

/* ---------- 基础排版 ---------- */
html { scroll-padding-top: 132px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  min-height: 100vh;
  font-family: var(--csd-sans);
  font-size: clamp(16px, 0.55vw + 14.4px, 17.5px);
  line-height: 1.75;
  color: var(--csd-ink);
  background-color: var(--csd-ivory);
  background-image:
    radial-gradient(circle at 12% -6%, rgba(212, 162, 76, 0.14), transparent 42%),
    radial-gradient(circle at 94% 2%, rgba(198, 40, 40, 0.07), transparent 34%),
    repeating-linear-gradient(0deg, rgba(26, 23, 19, 0.022) 0 1px, transparent 1px 5px);
  -webkit-font-smoothing: antialiased;
}

#main-content { display: block; scroll-margin-top: 132px; }

h1, h2, h3, h4 {
  font-family: var(--csd-serif);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.01em;
}
p { text-wrap: pretty; }

::selection { background: var(--csd-gold); color: var(--csd-ink-deep); }

:focus-visible {
  outline: 2px solid var(--csd-gold);
  outline-offset: 3px;
}

/* ---------- 布局容器 ---------- */
.csd-shell {
  width: 100%;
  max-width: calc(var(--csd-shell) + var(--csd-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--csd-gutter);
}

.csd-section {
  position: relative;
  padding-block: clamp(48px, 7vw, 104px);
}
.csd-section--paper { background: var(--csd-paper); }
.csd-section--green {
  background: var(--csd-green);
  color: var(--csd-ivory);
  border-top: 1px solid var(--csd-line-gold);
  border-bottom: 1px solid rgba(212, 162, 76, 0.28);
}
.csd-section--ink {
  background: var(--csd-ink-deep);
  color: var(--csd-ivory);
  border-top: 1px solid var(--csd-line-gold);
  border-bottom: 1px solid rgba(212, 162, 76, 0.28);
}
.csd-section--green h2, .csd-section--ink h2,
.csd-section--green h3, .csd-section--ink h3 { color: var(--csd-ivory); }

.csd-grid { display: grid; gap: clamp(18px, 2.4vw, 32px); }
.csd-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.csd-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.csd-grid--split { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr); }

@media (max-width: 980px) {
  .csd-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .csd-grid--2, .csd-grid--3, .csd-grid--split { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 排版组件 ---------- */
.csd-display {
  font-family: var(--csd-serif);
  font-weight: 800;
  font-size: clamp(44px, 8vw, 112px);
  line-height: 0.96;
  letter-spacing: -0.02em;
}

.csd-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--csd-red);
}
.csd-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}
.csd-section--green .csd-eyebrow,
.csd-section--ink .csd-eyebrow { color: var(--csd-gold); }

.csd-lead {
  max-width: 34em;
  font-size: clamp(17px, 0.6vw + 15px, 20px);
  line-height: 1.7;
  color: rgba(26, 23, 19, 0.84);
}
.csd-section--green .csd-lead,
.csd-section--ink .csd-lead { color: rgba(248, 241, 228, 0.84); }

.csd-num {
  font-family: var(--csd-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ---------- 标签 / 价目签 ---------- */
.csd-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.32em 0.62em;
  border: 1px solid currentColor;
  border-radius: 1px;
  font-family: var(--csd-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.1em;
}
.csd-tag--gold { background: var(--csd-gold-light); color: #5A3A0C; border-color: var(--csd-gold); }
.csd-tag--red { background: var(--csd-red); color: var(--csd-ivory); border-color: var(--csd-red-deep); }
.csd-tag--green { background: var(--csd-green); color: var(--csd-ivory); border-color: rgba(243, 217, 164, 0.45); }
.csd-tag--amber { background: rgba(181, 101, 29, 0.14); color: var(--csd-amber); border-color: rgba(181, 101, 29, 0.4); }
.csd-tag--ok { background: rgba(46, 107, 84, 0.12); color: var(--csd-state); border-color: rgba(46, 107, 84, 0.42); }

/* ---------- 按钮 ---------- */
.csd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  padding: 0.95em 1.35em;
  border: 1px solid transparent;
  border-radius: 1px;
  font-family: var(--csd-sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease,
    transform 0.18s ease, box-shadow 0.18s ease;
}
.csd-btn--red {
  background: var(--csd-red);
  color: var(--csd-ivory);
  box-shadow: 0 3px 0 var(--csd-red-deep);
}
.csd-btn--red:hover { background: var(--csd-red-deep); }
.csd-btn--red:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--csd-red-deep); }

.csd-btn--gold {
  background: var(--csd-gold);
  color: var(--csd-ink-deep);
  box-shadow: 0 3px 0 #9C722C;
}
.csd-btn--gold:hover { background: var(--csd-gold-light); }

.csd-btn--ghost {
  background: transparent;
  color: var(--csd-ink);
  border-color: var(--csd-line);
}
.csd-btn--ghost:hover { border-color: var(--csd-red); color: var(--csd-red); }
.csd-section--green .csd-btn--ghost,
.csd-section--ink .csd-btn--ghost { color: var(--csd-ivory); border-color: rgba(243, 217, 164, 0.45); }
.csd-section--green .csd-btn--ghost:hover,
.csd-section--ink .csd-btn--ghost:hover { color: var(--csd-gold); border-color: var(--csd-gold); }

.csd-btn--dark {
  background: var(--csd-green);
  color: var(--csd-ivory);
  box-shadow: 0 3px 0 var(--csd-ink-deep);
}
.csd-btn--dark:hover { background: var(--csd-ink-deep); }

/* ---------- 跳转链接 ---------- */
.csd-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 0.7em 1.15em;
  background: var(--csd-red);
  color: var(--csd-ivory);
  font-size: 13px;
  letter-spacing: 0.08em;
  border-radius: 1px;
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}
.csd-skip:focus,
.csd-skip:focus-visible { transform: translateY(0); }

/* ---------- 页头 ---------- */
.csd-header {
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
}

.csd-header__meta {
  background: var(--csd-green);
  color: var(--csd-ivory);
  border-bottom: 1px solid rgba(212, 162, 76, 0.35);
}
.csd-header__meta-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  min-height: 38px;
  padding-block: 6px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
}
.csd-header__brandline {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-weight: 600;
  color: var(--csd-gold-light);
}
.csd-header__dot {
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--csd-red);
  border: 1px solid var(--csd-gold);
  transform: rotate(45deg);
}
.csd-header__hint {
  display: flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(248, 241, 228, 0.78);
}
.csd-header__hint-key {
  color: var(--csd-gold);
  border-bottom: 1px solid rgba(212, 162, 76, 0.55);
  padding-bottom: 1px;
}

.csd-header__bar {
  position: relative;
  background: rgba(248, 241, 228, 0.97);
  box-shadow: 0 1px 0 rgba(26, 23, 19, 0.16), 0 14px 26px -26px rgba(8, 31, 26, 0.9);
}
.csd-header__bar-in {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 40px);
  min-height: 78px;
  padding-block: 12px;
}

.csd-logo { display: inline-flex; align-items: center; gap: 0.7em; flex: none; }
.csd-logo__seal {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--csd-red);
  color: var(--csd-ivory);
  font-family: var(--csd-serif);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  border: 1px solid var(--csd-red-deep);
  border-radius: 2px;
  box-shadow: inset 0 0 0 3px rgba(248, 241, 228, 0.24), 0 3px 0 rgba(127, 16, 24, 0.5);
}
.csd-logo__type { display: flex; flex-direction: column; line-height: 1.05; }
.csd-logo__name {
  font-family: var(--csd-serif);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--csd-ink);
}
.csd-logo__sub {
  margin-top: 4px;
  font-family: var(--csd-mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  color: rgba(26, 23, 19, 0.55);
}

.csd-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 26px);
  margin-left: auto;
}
.csd-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.2vw, 20px);
  counter-reset: csdnav;
}
.csd-nav__item { display: flex; }
.csd-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.45em;
  padding: 0.55em 0.2em;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(26, 23, 19, 0.78);
  counter-increment: csdnav;
  transition: color 0.18s ease;
}
.csd-nav__link::before {
  content: counter(csdnav, decimal-leading-zero);
  font-family: var(--csd-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: var(--csd-gold);
}
.csd-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.18em;
  height: 2px;
  background: var(--csd-red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}
.csd-nav__link:hover { color: var(--csd-red); }
.csd-nav__link:hover::after { transform: scaleX(1); }
.csd-nav__link[aria-current="page"] { color: var(--csd-ink); font-weight: 700; }
.csd-nav__link[aria-current="page"]::before { color: var(--csd-red); }
.csd-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.csd-nav__cta { flex: none; margin-left: clamp(6px, 1vw, 16px); }

.csd-navtoggle {
  display: none;
  align-items: center;
  gap: 0.6em;
  margin-left: auto;
  padding: 0.62em 0.85em;
  border: 1px solid var(--csd-line);
  border-radius: 1px;
  background: rgba(232, 221, 203, 0.6);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--csd-ink);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.csd-navtoggle[aria-expanded="true"] {
  background: var(--csd-green);
  color: var(--csd-ivory);
  border-color: var(--csd-green);
}
.csd-navtoggle__icon { position: relative; width: 20px; height: 12px; }
.csd-navtoggle__icon::before,
.csd-navtoggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.28s ease, top 0.28s ease;
}
.csd-navtoggle__icon::before { top: 0; }
.csd-navtoggle__icon::after { top: 10px; }
.csd-navtoggle[aria-expanded="true"] .csd-navtoggle__icon::before { top: 5px; transform: rotate(45deg); }
.csd-navtoggle[aria-expanded="true"] .csd-navtoggle__icon::after { top: 5px; transform: rotate(-45deg); }

.csd-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--csd-red), var(--csd-gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

@media (max-width: 1100px) {
  .csd-logo__name { font-size: 19px; }
  .csd-nav__link { font-size: 13px; }
}

@media (max-width: 960px) {
  .csd-navtoggle { display: inline-flex; }
  .csd-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--csd-gutter) 22px;
    background: var(--csd-ivory);
    border-top: 2px solid var(--csd-red);
    border-bottom: 1px solid var(--csd-line);
    box-shadow: 0 26px 44px -30px rgba(8, 31, 26, 0.9);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.34s ease, opacity 0.24s ease, visibility 0.34s ease;
  }
  .csd-nav[data-open="true"] {
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }
  .csd-nav__list { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .csd-nav__item { border-bottom: 1px solid rgba(26, 23, 19, 0.1); }
  .csd-nav__link { width: 100%; padding: 0.95em 0.2em; font-size: 16px; }
  .csd-nav__link::after { display: none; }
  .csd-nav__link[aria-current="page"] { color: var(--csd-red); }
  .csd-nav__cta { margin: 18px 0 0; width: 100%; }
}

@media (max-width: 720px) {
  .csd-header__hint { display: none; }
  .csd-header__meta-in { min-height: 34px; justify-content: flex-start; }
  .csd-header__bar-in { min-height: 66px; padding-block: 10px; }
  .csd-logo__seal { width: 36px; height: 36px; font-size: 20px; }
  .csd-logo__name { font-size: 18px; }
  html { scroll-padding-top: 108px; }
}

/* ---------- 页脚 ---------- */
.csd-footer {
  position: relative;
  overflow: hidden;
  background: var(--csd-ink-deep);
  color: var(--csd-ivory);
  border-top: 3px solid var(--csd-gold);
}
.csd-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 82% -18%, rgba(18, 59, 50, 0.95), transparent 58%);
  pointer-events: none;
}
.csd-footer__wave {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image: repeating-radial-gradient(
    circle at 116% 122%,
    rgba(212, 162, 76, 0.22) 0 1px,
    transparent 1px 16px
  );
}

.csd-footer__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr 0.8fr 1.15fr 0.7fr;
  gap: clamp(24px, 3.4vw, 56px);
  padding-block: clamp(40px, 6vw, 72px) clamp(26px, 4vw, 44px);
}

.csd-footer__brand { max-width: 36ch; }
.csd-footer__seal {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  background: var(--csd-red);
  color: var(--csd-ivory);
  font-family: var(--csd-serif);
  font-size: 21px;
  font-weight: 800;
  border: 1px solid rgba(243, 217, 164, 0.55);
  border-radius: 2px;
  box-shadow: inset 0 0 0 3px rgba(8, 31, 26, 0.25);
}
.csd-footer__name {
  font-family: var(--csd-serif);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--csd-ivory);
}
.csd-footer__desc {
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(248, 241, 228, 0.72);
}
.csd-footer__hint {
  margin-top: 16px;
  padding-left: 10px;
  border-left: 2px solid var(--csd-gold);
  font-size: 12px;
  line-height: 1.7;
  color: var(--csd-gold-light);
}

.csd-footer__col { min-width: 0; }
.csd-footer__title {
  margin-bottom: 14px;
  font-family: var(--csd-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--csd-gold);
}
.csd-footer__links {
  display: grid;
  gap: 9px;
  font-size: 14px;
}
.csd-footer__links a { color: rgba(248, 241, 228, 0.85); transition: color 0.16s ease; }
.csd-footer__links a:hover { color: var(--csd-gold-light); }

.csd-copy {
  padding: 0 0 1px;
  border-bottom: 1px dashed rgba(212, 162, 76, 0.45);
  font-family: var(--csd-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-align: left;
  color: rgba(248, 241, 228, 0.85);
  transition: color 0.16s ease, border-color 0.16s ease;
}
.csd-copy:hover { color: var(--csd-gold-light); border-color: var(--csd-gold); }

.csd-footer__addr {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(248, 241, 228, 0.62);
}

.csd-footer__base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-block: 18px 26px;
  border-top: 1px solid rgba(212, 162, 76, 0.25);
  font-family: var(--csd-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: rgba(248, 241, 228, 0.6);
}
.csd-footer__copy, .csd-footer__icp { margin: 0; }

@media (max-width: 980px) {
  .csd-footer__inner { grid-template-columns: 1fr 1fr; }
  .csd-footer__brand { grid-column: 1 / -1; max-width: none; }
}
@media (max-width: 620px) {
  .csd-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .csd-footer__base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 提示条 ---------- */
.csd-toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  z-index: 260;
  max-width: calc(100% - 40px);
  padding: 0.7em 1.2em;
  background: var(--csd-green);
  color: var(--csd-ivory);
  border: 1px solid var(--csd-gold);
  border-radius: 1px;
  font-size: 13px;
  letter-spacing: 0.06em;
  transform: translate(-50%, 18px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.csd-toast[data-open="true"] { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 面包屑 ---------- */
.csd-crumbs { font-size: 12px; letter-spacing: 0.06em; }
.csd-crumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6em; }
.csd-crumbs__item {
  display: flex;
  align-items: center;
  gap: 0.6em;
  color: rgba(26, 23, 19, 0.6);
}
.csd-crumbs__item + .csd-crumbs__item::before {
  content: "›";
  color: var(--csd-gold);
  font-size: 13px;
  line-height: 1;
}
.csd-crumbs__link { color: inherit; transition: color 0.16s ease; }
.csd-crumbs__link:hover { color: var(--csd-red); }
.csd-crumbs__item[aria-current="page"] { color: var(--csd-ink); font-weight: 600; }

/* ---------- 正文 ---------- */
.csd-prose { max-width: 44em; }
.csd-prose > * + * { margin-top: 1.1em; }
.csd-prose h2 {
  margin-top: 2em;
  padding-top: 0.7em;
  border-top: 1px solid var(--csd-line-gold);
  font-size: clamp(25px, 2.6vw, 32px);
}
.csd-prose h3 { margin-top: 1.6em; font-size: clamp(20px, 1.8vw, 25px); }
.csd-prose p { color: rgba(26, 23, 19, 0.86); }
.csd-prose ul, .csd-prose ol { display: grid; gap: 0.5em; }
.csd-prose li { position: relative; padding-left: 1.3em; }
.csd-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--csd-gold);
}
.csd-prose blockquote {
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 3px solid var(--csd-red);
  font-family: var(--csd-serif);
  font-size: 1.12em;
  color: var(--csd-green);
}
.csd-prose a {
  color: var(--csd-red);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.csd-prose a:hover { color: var(--csd-red-deep); }

/* ---------- 卡片 / 纸页叠层 ---------- */
.csd-card {
  position: relative;
  isolation: isolate;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--csd-ivory);
  border: 1px solid var(--csd-line);
  border-radius: var(--csd-radius);
  box-shadow: var(--csd-shadow);
}
.csd-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-top: 3px solid var(--csd-gold);
  pointer-events: none;
}
.csd-card--paper::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  transform: translate(8px, 8px);
  background: var(--csd-paper);
  border: 1px solid var(--csd-line);
}
.csd-card--chamfer {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

/* ---------- 图形容器 ---------- */
.csd-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--csd-paper);
  border: 1px solid var(--csd-line-gold);
}
.csd-figure--4x3 { aspect-ratio: 4 / 3; }
.csd-figure--1x1 { aspect-ratio: 1 / 1; }
.csd-figure--3x4 { aspect-ratio: 3 / 4; }
.csd-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background:
    linear-gradient(135deg, rgba(18, 59, 50, 0.92), rgba(8, 31, 26, 0.92)),
    repeating-linear-gradient(45deg, rgba(212, 162, 76, 0.18) 0 2px, transparent 2px 10px);
}
.csd-figure__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 26px 14px 10px;
  background: linear-gradient(transparent, rgba(8, 31, 26, 0.88));
  color: var(--csd-gold-light);
  font-family: var(--csd-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

/* ---------- 手风琴 ---------- */
.csd-acc { border-top: 1px solid var(--csd-line); }
.csd-acc__item {
  border-bottom: 1px solid var(--csd-line);
  transition: background-color 0.24s ease;
}
.csd-acc__item[data-open="true"] { background: rgba(232, 221, 203, 0.45); }
.csd-acc__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.05rem 0.9rem;
  text-align: left;
  font-family: var(--csd-sans);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--csd-ink);
  transition: color 0.18s ease;
}
.csd-acc__trigger:hover { color: var(--csd-red); }
.csd-acc__trigger[aria-expanded="true"] { color: var(--csd-red); }
.csd-acc__icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  border: 1px solid currentColor;
  border-radius: 50%;
}
.csd-acc__icon::before,
.csd-acc__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}
.csd-acc__icon::before { width: 8px; height: 1px; }
.csd-acc__icon::after { width: 1px; height: 8px; transition: transform 0.25s ease, opacity 0.25s ease; }
.csd-acc__trigger[aria-expanded="true"] .csd-acc__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}
.csd-acc__panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.34s ease, visibility 0.34s ease;
}
.csd-acc__item[data-open="true"] .csd-acc__panel { grid-template-rows: 1fr; visibility: visible; }
.csd-acc__inner { overflow: hidden; padding-inline: 0.9rem; }
.csd-acc__inner > p { max-width: 62ch; color: rgba(26, 23, 19, 0.82); }
.csd-acc__inner > *:last-child { padding-bottom: 1.1rem; }

/* ---------- 横向价目签 ---------- */
.csd-rail { position: relative; }
.csd-rail__nav { display: flex; justify-content: flex-end; gap: 8px; margin-bottom: 10px; }
.csd-rail__btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--csd-ivory);
  border: 1px solid var(--csd-line);
  border-radius: 50%;
  font-family: var(--csd-mono);
  font-size: 13px;
  color: var(--csd-ink);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.csd-rail__btn:hover {
  background: var(--csd-red);
  border-color: var(--csd-red);
  color: var(--csd-ivory);
}
.csd-rail__track {
  display: flex;
  gap: clamp(12px, 1.6vw, 20px);
  padding: 6px 2px 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--csd-gold) rgba(26, 23, 19, 0.08);
}
.csd-rail__track::-webkit-scrollbar { height: 6px; }
.csd-rail__track::-webkit-scrollbar-track { background: rgba(26, 23, 19, 0.08); }
.csd-rail__track::-webkit-scrollbar-thumb {
  background: linear-gradient(90deg, var(--csd-gold), var(--csd-gold-light));
  border-radius: 99px;
}
.csd-rail__track > * {
  flex: 0 0 clamp(230px, 26vw, 300px);
  scroll-snap-align: start;
}

/* ---------- 画册目录 ---------- */
.csd-toc {
  position: sticky;
  top: 140px;
  align-self: start;
  font-size: 13px;
}
.csd-toc__list { display: grid; gap: 2px; border-left: 1px solid var(--csd-line); }
.csd-toc__link {
  display: block;
  margin-left: -1px;
  padding: 0.5em 0.5em 0.5em 1em;
  border-left: 2px solid transparent;
  letter-spacing: 0.03em;
  color: rgba(26, 23, 19, 0.66);
  transition: color 0.18s ease, border-color 0.18s ease;
}
.csd-toc__link:hover { color: var(--csd-red); }
.csd-toc__link[aria-current="true"] {
  color: var(--csd-ink);
  font-weight: 700;
  border-left-color: var(--csd-red);
}

/* ---------- 滚动显现 ---------- */
html.csd-motion [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}
html.csd-motion [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 动效降级 ---------- */
@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;
  }
  html.csd-motion [data-reveal] { opacity: 1; transform: none; }
  .csd-progress { transition: none; }
}