/**
 * Synapse 品牌 · 登录 / 顶栏 / 侧栏共用
 * 英文在上、中文在下；字号/颜色有层级；宽度自然（上窄下宽即可）
 */

.synapse-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.synapse-brand__mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #f5f5f5;
  background: linear-gradient(145deg, #3a3a3a 0%, #1f1f1f 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 1px 2px rgba(0, 0, 0, 0.12);
}

.synapse-brand__mark svg {
  width: 16px;
  height: 16px;
  display: block;
}

.synapse-brand__stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  min-width: 0;
  line-height: 1.2;
}

/* 英文主标（在上） */
.synapse-brand__en {
  margin: 0;
  display: block;
  font-family: "Alimama ShuHeiTi", var(--cursor-font-display, "PingFang SC", sans-serif);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  line-height: 1.15;
  white-space: nowrap;
}

/* 中文副标（在下 · 更淡更小） */
.synapse-brand__zh-title {
  margin: 0;
  display: block;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--muted);
  line-height: 1.35;
  white-space: nowrap;
  opacity: 0.55;
}

/* 兼容旧结构 */
.synapse-brand__name {
  margin: 0;
  font-family: "Alimama ShuHeiTi", var(--cursor-font-display, var(--lg-font-display, "PingFang SC", "Microsoft YaHei", sans-serif));
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}

.synapse-brand__sep,
.synapse-brand__zh {
  display: none;
}

.synapse-brand__sub {
  font-size: 10px;
  font-weight: 550;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.synapse-brand__slogan {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.synapse-brand__slogan-en {
  font-weight: 550;
  letter-spacing: 0.01em;
  color: var(--text);
  opacity: 0.78;
}

.synapse-brand__slogan-zh {
  font-size: 12px;
  color: var(--muted);
}

/* ── 顶栏 ── */
.synapse-brand--nav {
  gap: 0;
  flex-shrink: 0;
  max-width: none;
  align-items: center;
}

.synapse-brand--nav .synapse-brand__mark {
  display: none;
}

.synapse-brand--nav .synapse-brand__stack {
  gap: 2px;
}

.synapse-brand--nav .synapse-brand__en {
  font-size: 15px;
  letter-spacing: 0.02em;
}

.synapse-brand--nav .synapse-brand__zh-title {
  font-size: 10.5px;
  letter-spacing: 0.01em;
  opacity: 0.52;
}

.synapse-brand--nav .synapse-brand__sub {
  display: none;
}

@media (max-width: 1100px) {
  .synapse-brand--nav .synapse-brand__en {
    font-size: 14px;
  }
}

@media (max-width: 900px) {
  .synapse-brand--nav .synapse-brand__en {
    font-size: 13px;
  }
  .synapse-brand--nav .synapse-brand__zh-title {
    font-size: 9.5px;
  }
}

/* ── 侧栏 ── */
.synapse-brand--rail {
  align-items: flex-start;
  gap: 0;
  width: 100%;
  padding: 2px 0 0;
}

.synapse-brand--rail .synapse-brand__mark {
  display: none;
}

.synapse-brand--rail .synapse-brand__stack {
  gap: 4px;
}

.synapse-brand--rail .synapse-brand__en {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.synapse-brand--rail .synapse-brand__zh-title {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.02em;
  opacity: 0.5;
  white-space: normal;
}

.synapse-brand--rail .synapse-brand__sub {
  display: none;
}

/* ── 登录页主视觉 ── */
.synapse-brand--hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0;
  width: 100%;
  margin: 0;
}

.synapse-brand--hero .synapse-brand__mark {
  display: none;
}

.synapse-brand--hero .synapse-brand__stack {
  align-items: center;
  gap: 8px;
  margin-bottom: 0;
}

.synapse-brand--hero .synapse-brand__en {
  font-size: clamp(28px, 4vw, 34px);
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.synapse-brand--hero .synapse-brand__zh-title {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.06em;
  opacity: 0.5;
  white-space: normal;
}

.synapse-brand--hero .synapse-brand__name {
  font-size: clamp(28px, 4vw, 34px);
  letter-spacing: 0.03em;
  line-height: 1.1;
  margin: 0 0 8px;
}

.synapse-brand--hero .synapse-brand__product {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--muted);
  opacity: 0.5;
}

.synapse-brand--hero .synapse-brand__slogan {
  margin: 0;
  justify-content: center;
}

.synapse-brand--hero .synapse-brand__slogan-zh {
  font-size: 12.5px;
  opacity: 0.55;
}

html[data-theme="dark"] .synapse-brand__mark {
  background: linear-gradient(145deg, #4a4a4a 0%, #2a2a2a 100%);
  color: #fafafa;
}

html[data-theme="dark"] .synapse-brand__en,
html[data-theme="dark"] .synapse-brand__name {
  color: rgba(255, 255, 255, 0.96);
}

html[data-theme="dark"] .synapse-brand__zh-title {
  color: rgba(255, 255, 255, 0.4);
  opacity: 1;
}

html:not([data-theme="dark"]) .synapse-brand__en,
html:not([data-theme="dark"]) .synapse-brand__name {
  color: #171717;
}

html:not([data-theme="dark"]) .synapse-brand__zh-title {
  color: rgba(0, 0, 0, 0.42);
  opacity: 1;
}