/* ==========================================================
   星欧娱乐 · 星欧平台 —— components.css
   可复用组件：章节头 / 卡片 / 步骤 / 时间轴 / 表格 /
   FAQ / 标签 / 提示框 / 按钮 / CTA
   ========================================================== */

/* ---------------- 章节 ---------------- */

.xo-sec {
  margin: 0 0 clamp(34px, 5vw, 64px);
}

.xo-sec:last-child {
  margin-bottom: 0;
}

.xo-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--xo-line);
}

.xo-sec__num {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--xo-seal);
  padding-top: 4px;
}

.xo-sec__title {
  margin: 0;
  font-size: clamp(1.2rem, 1.9vw, 1.62rem);
  letter-spacing: 0.04em;
}

.xo-sec__note {
  margin-left: auto;
  font-family: var(--f-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--xo-ink-4);
  text-align: right;
}

/* ---------------- 网格 ---------------- */

.xo-grid {
  display: grid;
  gap: clamp(14px, 1.8vw, 22px);
}

.xo-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.xo-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.xo-grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* ---------------- 卡片 ---------------- */

.xo-card {
  position: relative;
  background: rgba(255, 253, 247, 0.5);
  border: 1px solid var(--xo-line);
  border-radius: var(--r-s);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease), transform 0.24s var(--ease);
}

.xo-card::before,
.xo-card::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  border: 1px solid var(--xo-line-2);
  transition: border-color 0.24s var(--ease);
  pointer-events: none;
}

.xo-card::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.xo-card::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.xo-card:hover {
  border-color: rgba(161, 49, 39, 0.42);
  background: rgba(255, 253, 247, 0.9);
  transform: translateY(-2px);
}

.xo-card:hover::before,
.xo-card:hover::after {
  border-color: var(--xo-seal);
}

.xo-card__link {
  display: block;
  padding: clamp(18px, 2.2vw, 26px);
  border: 0;
  color: inherit;
  height: 100%;
}

.xo-card__link:hover {
  color: inherit;
}

.xo-card__num {
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  color: var(--xo-ink-4);
  margin: 0 0 12px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.xo-card__num em {
  color: var(--xo-seal);
  letter-spacing: 0.06em;
}

.xo-card__title {
  font-size: 1.06rem;
  line-height: 1.5;
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.xo-card__text {
  font-size: 0.86rem;
  line-height: 1.85;
  color: var(--xo-ink-3);
  margin: 0 0 16px;
}

.xo-card__foot {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--xo-line);
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  color: var(--xo-ink-4);
}

.xo-card--media .xo-card__media {
  margin: 0;
  overflow: hidden;
  border-bottom: 1px solid var(--xo-line);
}

.xo-card--media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.02);
  transition: filter 0.4s var(--ease), transform 0.6s var(--ease);
}

.xo-card--media:hover img {
  filter: saturate(0.95) contrast(1.04);
  transform: scale(1.02);
}

.xo-card--topic .xo-card__num {
  color: var(--xo-brass);
}

.xo-card__points {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  font-size: 0.8rem;
  color: var(--xo-ink-3);
}

.xo-card__points li {
  position: relative;
  padding-left: 14px;
  margin: 4px 0;
}

.xo-card__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 1px;
  background: var(--xo-seal);
}

.xo-card--topic {
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 2.2vw, 26px);
}

.xo-card--topic .xo-card__title {
  font-size: 1.14rem;
}

.xo-card--topic .xo-card__en {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--xo-ink-4);
  margin: -4px 0 12px;
}

/* ---------------- 行列表 ---------------- */

.xo-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--xo-line-2);
}

.xo-row {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 16px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--xo-line);
}

.xo-row__num {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  color: var(--xo-seal);
  letter-spacing: 0.1em;
  padding-top: 5px;
}

.xo-row__title {
  font-family: var(--f-serif);
  font-size: 1.04rem;
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.xo-row__text {
  margin: 0;
  font-size: 0.87rem;
  color: var(--xo-ink-3);
}

.xo-row__meta {
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  color: var(--xo-ink-4);
  text-align: right;
  padding-top: 6px;
  white-space: nowrap;
}

/* ---------------- 数据条 ---------------- */

.xo-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--xo-line);
  border: 1px solid var(--xo-line);
}

.xo-stats__item {
  background: var(--xo-paper);
  padding: 18px 16px;
}

.xo-stats dt {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--xo-ink-4);
  margin-bottom: 6px;
}

.xo-stats dd {
  margin: 0;
  font-family: var(--f-serif);
  font-size: clamp(1.3rem, 2.2vw, 1.72rem);
  color: var(--xo-ink);
  letter-spacing: 0.02em;
}

.xo-stats dd small {
  font-family: var(--f-sans);
  font-size: 0.7rem;
  color: var(--xo-ink-4);
  margin-left: 4px;
  letter-spacing: 0.06em;
}

/* ---------------- 步骤 ---------------- */

.xo-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: xo-step;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--xo-line-2);
}

.xo-steps__item {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--xo-line);
}

.xo-steps__n {
  font-family: var(--f-mono);
  font-size: 1rem;
  color: var(--xo-brass);
  letter-spacing: 0.04em;
}

.xo-steps__item h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.xo-steps__item p {
  margin: 0;
  font-size: 0.87rem;
  color: var(--xo-ink-3);
}

/* ---------------- 时间轴 ---------------- */

.xo-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--xo-line-2);
}

.xo-timeline__item {
  position: relative;
  padding: 0 0 30px 20px;
}

.xo-timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--xo-paper);
  border: 1px solid var(--xo-seal);
  transform: rotate(45deg);
}

.xo-timeline__item:last-child {
  padding-bottom: 0;
}

.xo-timeline__year {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--xo-seal);
  margin: 0 0 4px;
}

.xo-timeline__body h3 {
  margin: 0 0 6px;
  font-size: 1.04rem;
}

.xo-timeline__body p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--xo-ink-3);
  max-width: 62ch;
}

/* ---------------- 表格 ---------------- */

.xo-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--xo-line-2);
  border-radius: var(--r-s);
}

.xo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 560px;
}

.xo-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  color: var(--xo-ink-4);
  border-bottom: 1px solid var(--xo-line);
}

.xo-table th,
.xo-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--xo-line);
  vertical-align: top;
}

.xo-table thead th {
  font-family: var(--f-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--xo-ink-4);
  background: rgba(22, 26, 29, 0.035);
  white-space: nowrap;
}

.xo-table tbody tr:last-child td {
  border-bottom: 0;
}

.xo-table td strong {
  font-family: var(--f-serif);
}

/* ---------------- 标签 / 筛选 ---------------- */

.xo-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.xo-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--xo-line-2);
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--xo-ink-3);
  transition: all 0.2s var(--ease);
}

.xo-chip span {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  color: var(--xo-ink-4);
}

.xo-chip:hover {
  border-color: var(--xo-seal);
  color: var(--xo-seal);
}

.xo-chip.is-on {
  background: var(--xo-ink);
  border-color: var(--xo-ink);
  color: var(--xo-paper);
}

.xo-chip.is-on span {
  color: rgba(244, 239, 228, 0.6);
}

.xo-tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--xo-line-2);
  border-radius: var(--r-s);
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--xo-ink-3);
  white-space: nowrap;
}

/* ---------------- FAQ ---------------- */

.xo-faq {
  border-top: 1px solid var(--xo-line-2);
}

.xo-faq__item {
  border-bottom: 1px solid var(--xo-line);
}

.xo-faq__item summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 34px 18px 0;
  cursor: pointer;
  position: relative;
  list-style: none;
  font-family: var(--f-serif);
  font-size: 1rem;
  color: var(--xo-ink);
  letter-spacing: 0.02em;
}

.xo-faq__item summary::-webkit-details-marker {
  display: none;
}

.xo-faq__item summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 16px;
  font-family: var(--f-mono);
  font-size: 1.1rem;
  color: var(--xo-seal);
  transition: transform 0.24s var(--ease);
}

.xo-faq__item[open] summary::after {
  content: "−";
}

.xo-faq__item summary:hover {
  color: var(--xo-seal);
}

.xo-faq__n {
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: var(--xo-ink-4);
  flex: 0 0 26px;
}

.xo-faq__answer {
  padding: 0 34px 20px 40px;
  font-size: 0.89rem;
  color: var(--xo-ink-3);
  line-height: 1.95;
}

.xo-faq__answer p {
  margin: 0;
}

/* ---------------- 提示框 / 引文 ---------------- */

.xo-callout {
  padding: 18px 20px;
  border: 1px solid var(--xo-line);
  border-left: 2px solid var(--xo-brass);
  background: rgba(162, 132, 74, 0.06);
  border-radius: var(--r-s);
  font-size: 0.87rem;
  color: var(--xo-ink-3);
  margin: 0 0 22px;
}

.xo-callout__title {
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--xo-brass);
  margin: 0 0 8px;
}

.xo-callout p:last-child {
  margin-bottom: 0;
}

.xo-quote {
  margin: 26px 0;
  padding: 4px 0 4px 22px;
  border-left: 2px solid var(--xo-seal);
  font-family: var(--f-serif);
  font-size: 1.02rem;
  line-height: 1.95;
  color: var(--xo-ink-2);
}

.xo-quote p {
  margin: 0 0 8px;
}

.xo-quote footer {
  font-family: var(--f-sans);
  font-size: 0.76rem;
  color: var(--xo-ink-4);
  letter-spacing: 0.04em;
}

/* ---------------- 按钮 ---------------- */

.xo-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: var(--xo-ink);
  color: var(--xo-paper);
  border: 1px solid var(--xo-ink);
  border-radius: var(--r-s);
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  transition: background 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.xo-btn:hover {
  background: var(--xo-seal);
  border-color: var(--xo-seal);
  color: #fff;
}

.xo-btn--ghost {
  background: transparent;
  color: var(--xo-ink);
}

.xo-btn--ghost:hover {
  background: transparent;
  color: var(--xo-seal);
  border-color: var(--xo-seal);
}

.xo-btn__arrow {
  font-family: var(--f-mono);
  font-size: 0.8rem;
}

/* ---------------- CTA ---------------- */

.xo-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: clamp(32px, 4vw, 56px);
  padding: clamp(24px, 3vw, 36px);
  background: var(--xo-night);
  border-radius: var(--r-s);
  position: relative;
  overflow: hidden;
}

.xo-cta::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(162, 132, 74, 0.25);
  transform: rotate(45deg);
  pointer-events: none;
}

.xo-cta h2 {
  color: var(--xo-paper);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  margin: 0 0 8px;
}

.xo-cta p {
  color: rgba(244, 239, 228, 0.6);
  margin: 0;
  font-size: 0.87rem;
  max-width: 62ch;
}

.xo-cta .xo-eyebrow {
  color: rgba(244, 239, 228, 0.4);
  margin-bottom: 12px;
}

.xo-cta .xo-btn {
  background: var(--xo-paper);
  border-color: var(--xo-paper);
  color: var(--xo-ink);
  position: relative;
  z-index: 1;
}

.xo-cta .xo-btn:hover {
  background: var(--xo-seal);
  border-color: var(--xo-seal);
  color: #fff;
}

/* ---------------- 两栏文本 ---------------- */

.xo-cols {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.xo-cols__aside {
  padding: 20px;
  border: 1px solid var(--xo-line);
  border-radius: var(--r-s);
  background: rgba(255, 253, 247, 0.45);
  font-size: 0.86rem;
  color: var(--xo-ink-3);
}

.xo-cols__aside h3 {
  font-size: 0.92rem;
  margin-bottom: 10px;
}

/* ---------------- 断点 ---------------- */

@media (max-width: 980px) {
  .xo-grid--3,
  .xo-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .xo-cols {
    grid-template-columns: 1fr;
  }

  .xo-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .xo-grid--2,
  .xo-grid--3,
  .xo-grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .xo-sec__head {
    flex-wrap: wrap;
    gap: 8px;
  }

  .xo-sec__note {
    margin-left: 0;
    text-align: left;
    flex-basis: 100%;
  }

  .xo-row {
    grid-template-columns: 34px 1fr;
  }

  .xo-row__meta {
    grid-column: 2;
    text-align: left;
    padding-top: 0;
  }

  .xo-faq__item summary {
    font-size: 0.94rem;
  }

  .xo-faq__answer {
    padding-left: 0;
    padding-right: 0;
  }

  .xo-quote {
    font-size: 0.95rem;
  }
}