/* =========================================================================
 * VT CSSA 编辑部风格 · 组件样式
 * 依赖 tokens.css;组件内不写死颜色。
 * ========================================================================= */

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--colorBg);
  color: var(--colorInk);
  font-family: var(--fontSans);
  font-size: var(--fsBody);
  line-height: var(--lhBody);
  transition: background var(--durSlow) var(--easePaper), color var(--durSlow) var(--easePaper);
  -webkit-font-smoothing: antialiased;
}

/* 全页极淡窗棂几何纹样(装饰,不承载信息) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--colorPatternInk) 1px, transparent 1px),
    linear-gradient(90deg, var(--colorPatternInk) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 0%, transparent 75%);
}

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

a { color: inherit; }

button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--colorFocusRing);
  outline-offset: 3px;
  border-radius: 3px;
}

::selection { background: var(--colorWarmJade); }

.skipLink {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 200;
  background: var(--colorCtaPrimary);
  color: var(--colorCtaPrimaryText);
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-size: var(--fsSmall);
  transition: top var(--durFast) var(--easePaper);
}
.skipLink:focus { top: 12px; }

.container {
  max-width: var(--maxContent);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px);
}

.section { padding-top: var(--gapSection); }
.section:last-of-type { padding-bottom: var(--gapSection); }

.sectionAlt {
  background: var(--colorBgAlt);
  border-top: 1px solid var(--colorBorder);
  border-bottom: 1px solid var(--colorBorder);
  padding-bottom: var(--gapSection);
  margin-top: var(--gapSection);
}
.sectionAlt.section { padding-top: calc(var(--gapSection) * 0.8); margin-top: var(--gapSection); }

/* ============================== 章节标题(编辑部目录感) ============================== */

.sectionHeading {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.sectionHeading .rule {
  width: 3px;
  align-self: stretch;
  background: var(--colorRougeMaroon);
  border-radius: 2px;
  flex: none;
}
.sectionHeading .sealChip {
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 7px;
  background: var(--colorSealBg);
  color: var(--colorSealText);
  display: grid;
  place-items: center;
  font-family: var(--fontSerif);
  font-weight: 700;
  font-size: 17px;
  margin-top: 4px;
  box-shadow: 0 1px 0 var(--colorShadow);
}
.sectionHeading .headingBody { flex: 1; }
.sectionHeading .kicker {
  font-size: var(--fsMicro);
  letter-spacing: 0.22em;
  color: var(--colorSoftInk);
  text-transform: uppercase;
  font-weight: 600;
}
.sectionHeading .kicker b { color: var(--colorAccentDate); font-weight: 700; }
.sectionHeading h2 {
  font-size: var(--fsH2);
  letter-spacing: var(--lsZhTitle);
  line-height: 1.3;
  margin-top: 4px;
  font-weight: 800;
}
.sectionHeading .headingNote {
  color: var(--colorSoftInk);
  font-size: var(--fsSmall);
  margin-top: 6px;
  max-width: 60ch;
}

/* ============================== 通用小组件 ============================== */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  border: 1px solid var(--colorBorderStrong);
  border-radius: var(--radiusChip);
  font-size: var(--fsMicro);
  letter-spacing: 0.06em;
  color: var(--colorSoftInk);
  background: transparent;
  white-space: nowrap;
}
.chip.chipAccent { color: var(--colorAccentDate); border-color: var(--colorAccentDate); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: var(--fsSmall);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--durFast) var(--easePaper), box-shadow var(--durFast) var(--easePaper),
    background var(--durFast) var(--easePaper), color var(--durFast) var(--easePaper),
    border-color var(--durFast) var(--easePaper);
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 14px var(--colorShadow); }
.btn:active { transform: translateY(0); }

.btnPrimary { background: var(--colorCtaPrimary); color: var(--colorCtaPrimaryText); }
.btnSecondary {
  background: transparent;
  color: var(--colorInk);
  border-color: var(--colorBorderStrong);
}
.btnSecondary:hover { border-color: var(--colorCtaSecondary); color: var(--colorCtaSecondary); }
.btnTeal { background: var(--colorCtaSecondary); color: var(--colorCtaPrimaryText); }
.btnLink {
  background: none;
  border: none;
  color: var(--colorAccentDate);
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 10px 6px;
}
.btnLink:hover { box-shadow: none; }
.btn[aria-disabled="true"] {
  background: transparent;
  color: var(--colorSoftInk);
  border-color: var(--colorBorder);
  cursor: not-allowed;
}
.btn[aria-disabled="true"]:hover { transform: none; box-shadow: none; }

/* 状态徽章:颜色 + 圆点 + 文字,不单靠颜色表意 */
.statusBadge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fsMicro);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--colorSoftInk);
}
.statusBadge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}
.statusBadge.stOpen { color: var(--colorStatusOpen); }
.statusBadge.stUpcoming { color: var(--colorStatusUpcoming); }
.statusBadge.stClosed { color: var(--colorStatusClosed); }
.statusBadge.stClosed::before { border-radius: 1px; }   /* 形状也参与表意 */
.statusBadge.stPast { color: var(--colorStatusPast); }
.statusBadge.stPast::before { border-radius: 1px; transform: rotate(45deg); }

/* 票根式日期 */
.dateSlip {
  flex: none;
  width: 62px;
  border: 1px solid var(--colorBorderStrong);
  border-radius: 8px;
  overflow: hidden;
  text-align: center;
  background: var(--colorCard);
}
.dateSlip .slipMonth {
  display: block;
  background: var(--colorCtaPrimary);
  color: var(--colorCtaPrimaryText);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 3px 0;
}
.dateSlip .slipDay {
  display: block;
  font-family: var(--fontSerif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.25;
  padding: 4px 0 2px;
}
.dateSlip .slipYear {
  display: block;
  font-size: 10px;
  color: var(--colorSoftInk);
  padding-bottom: 5px;
  border-top: 1px dashed var(--colorBorder);
  margin: 0 8px;
  padding-top: 3px;
}

/* ============================== Header ============================== */

.siteHeader {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--colorHeaderBg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--colorBorder);
  transition: background var(--durSlow) var(--easePaper);
}
.headerInner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
  transition: padding var(--durMid) var(--easePaper);
}
.siteHeader.isCompact .headerInner { padding-top: 9px; padding-bottom: 9px; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 0;
}
.brand .brandSeal {
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--colorSealBg);
  color: var(--colorSealText);
  display: grid;
  place-items: center;
  font-family: var(--fontSerif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
}
.brand .brandName {
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 0.08em;
  line-height: 1.2;
}
.brand .brandSub {
  display: block;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--colorSoftInk);
  font-weight: 500;
  margin-top: 1px;
  white-space: nowrap;
}

.mainNav ul {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 26px);
  list-style: none;
}
.mainNav a {
  text-decoration: none;
  font-size: var(--fsSmall);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--colorInk);
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--durFast) var(--easePaper), border-color var(--durFast) var(--easePaper);
}
.mainNav a:hover { color: var(--colorRougeMaroon); border-bottom-color: var(--colorRougeMaroon); }

.headerActions { display: flex; align-items: center; gap: 10px; }
.headerActions .btn { min-height: 38px; padding: 7px 16px; }

.themeToggle {
  white-space: nowrap;
  border: 1px solid var(--colorBorderStrong);
  background: transparent;
  color: var(--colorInk);
  border-radius: var(--radiusChip);
  min-width: 44px;
  min-height: 38px;
  padding: 6px 12px;
  font-size: var(--fsSmall);
  cursor: pointer;
  transition: border-color var(--durFast) var(--easePaper), color var(--durFast) var(--easePaper);
}
.themeToggle:hover { border-color: var(--colorAccentDate); color: var(--colorAccentDate); }

.menuToggle {
  display: none;
  border: 1px solid var(--colorBorderStrong);
  background: transparent;
  color: var(--colorInk);
  border-radius: 8px;
  min-width: 44px;
  min-height: 44px;
  font-size: 18px;
  cursor: pointer;
}

.mobileNav {
  display: none;
  border-top: 1px solid var(--colorBorder);
  background: var(--colorHeaderBg);
}
.mobileNav.isOpen { display: block; }
.mobileNav ul { list-style: none; padding: 8px 0 14px; }
.mobileNav a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px clamp(16px, 4vw, 40px);
  min-height: 44px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 1px solid var(--colorBorder);
}
.mobileNav a .navEn {
  font-size: var(--fsMicro);
  letter-spacing: 0.18em;
  color: var(--colorSoftInk);
  text-transform: uppercase;
}
.mobileNav .mobileCta { display: flex; gap: 10px; padding: 14px clamp(16px, 4vw, 40px) 4px; }

/* ============================== Hero ============================== */

.hero { position: relative; overflow: hidden; }
.heroInner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding-top: clamp(40px, 6vw, 84px);
  padding-bottom: clamp(48px, 7vw, 96px);
  position: relative;
  z-index: 1;
}

/* Blacksburg 山脉轮廓(自绘 SVG,随主题变色) */
.heroRidge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  pointer-events: none;
  color: var(--colorRidge);
}
.heroRidge svg { display: block; width: 100%; height: clamp(90px, 14vw, 190px); }

.heroKicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fsMicro);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--colorSoftInk);
}
.heroKicker::before {
  content: "";
  width: 26px;
  height: 1.5px;
  background: var(--colorAccentDate);
}
.heroTitle {
  font-size: var(--fsH1);
  font-weight: 900;
  letter-spacing: var(--lsZhTitle);
  line-height: 1.22;
  margin: 18px 0 16px;
}
.heroTitle .titleMark { color: var(--colorRougeMaroon); }
.heroDesc {
  color: var(--colorSoftInk);
  max-width: 46ch;
  font-size: clamp(15px, 1.3vw, 16.5px);
}
.heroCtas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ============================== 横幅轮播 ============================== */

.carousel {
  position: relative;
  border: 1px solid var(--colorBorderStrong);
  border-radius: var(--radiusCard);
  background: var(--colorCard);
  box-shadow: 0 10px 30px var(--colorShadow);
}
.carouselHead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--colorBorder);
}
.carouselHead .carouselLabel {
  font-size: var(--fsMicro);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--colorSoftInk);
}
.carouselControls { display: flex; align-items: center; gap: 6px; }
.carouselBtn {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--colorBorderStrong);
  background: transparent;
  color: var(--colorInk);
  font-size: 14px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color var(--durFast) var(--easePaper), color var(--durFast) var(--easePaper);
}
.carouselBtn:hover { border-color: var(--colorAccentDate); color: var(--colorAccentDate); }

.carouselViewport { overflow: hidden; }
.carouselTrack {
  display: flex;
  transition: transform var(--durSlow) var(--easePaper);
}
.bannerSlide {
  flex: 0 0 100%;
  min-width: 0;
  padding: clamp(20px, 2.6vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 268px;
}
.bannerSlide .bannerTopRow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.bannerSlide .bannerDate {
  font-size: var(--fsMicro);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--colorAccentDate);
}
.bannerSlide h3 {
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 800;
  letter-spacing: var(--lsZhTitle);
  line-height: 1.3;
}
.bannerSlide .bannerSub {
  font-size: var(--fsMicro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--colorSoftInk);
  font-weight: 600;
  margin-top: -6px;
}
.bannerSlide p { color: var(--colorSoftInk); font-size: var(--fsSmall); max-width: 52ch; }
.bannerSlide .bannerCta { margin-top: auto; }

/* 无图横幅的自绘纹样区 */
.bannerPattern {
  height: 6px;
  border-radius: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--colorWarmJade) 0 18px,
    transparent 18px 26px
  );
}
[data-banner-category="event"] .bannerPattern,
[data-banner-category="announcement"] .bannerPattern {
  background: repeating-linear-gradient(90deg, var(--colorRougeMaroon) 0 18px, transparent 18px 26px);
  opacity: 0.35;
}
[data-banner-category="freshman"] .bannerPattern {
  background: repeating-linear-gradient(90deg, var(--colorPineTeal) 0 18px, transparent 18px 26px);
  opacity: 0.4;
}
[data-banner-category="sponsor"] .bannerPattern {
  background: repeating-linear-gradient(90deg, var(--colorAgedGold) 0 18px, transparent 18px 26px);
  opacity: 0.5;
}
[data-banner-category="recruitment"] .bannerPattern {
  background: repeating-linear-gradient(90deg, var(--colorPersimmonOrange) 0 18px, transparent 18px 26px);
  opacity: 0.4;
}

.carouselFoot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 14px;
  border-top: 1px dashed var(--colorBorder);
}
.carouselDots { display: flex; gap: 8px; }
.carouselDot {
  width: 22px;
  height: 22px;
  border: none;
  background: transparent;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
}
.carouselDot::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--colorSoftInk);
  background: transparent;
  transition: background var(--durFast) var(--easePaper), border-color var(--durFast) var(--easePaper),
    width var(--durFast) var(--easePaper);
}
.carouselDot[aria-selected="true"]::after {
  background: var(--colorRougeMaroon);
  border-color: var(--colorRougeMaroon);
  width: 20px;
  border-radius: 4px;
}
.carouselPause {
  border: none;
  background: transparent;
  color: var(--colorSoftInk);
  font-size: var(--fsMicro);
  letter-spacing: 0.08em;
  cursor: pointer;
  padding: 6px 8px;
  min-height: 34px;
}
.carouselPause:hover { color: var(--colorAccentDate); }

/* ============================== 快速入口 ============================== */

.quickAccess {
  position: relative;
  z-index: 2;
  margin-top: clamp(-30px, -3vw, -48px);
}
.quickGrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.quickCard {
  display: block;
  text-decoration: none;
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  padding: 18px 18px 16px;
  min-height: 44px;
  transition: transform var(--durMid) var(--easePaper), box-shadow var(--durMid) var(--easePaper),
    border-color var(--durMid) var(--easePaper);
}
.quickCard:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 22px var(--colorShadow);
  border-color: var(--colorBorderStrong);
}
.quickCard .quickIndex {
  font-family: var(--fontSerif);
  font-size: var(--fsMicro);
  color: var(--colorAccentDate);
  letter-spacing: 0.2em;
}
.quickCard .quickLabel { font-weight: 800; font-size: 16px; margin-top: 4px; }
.quickCard .quickNote { color: var(--colorSoftInk); font-size: var(--fsMicro); margin-top: 3px; }
.quickCard .quickArrow {
  color: var(--colorRougeMaroon);
  font-size: var(--fsSmall);
  margin-top: 8px;
  display: inline-block;
  transition: transform var(--durFast) var(--easePaper);
}
.quickCard:hover .quickArrow { transform: translateX(4px); }

/* ============================== 关于学联 ============================== */

.aboutGrid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 16px;
}
.aboutGrid .valueCol { display: grid; gap: 16px; }
.valueCard {
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  padding: clamp(20px, 2.4vw, 30px);
  position: relative;
  transition: transform var(--durMid) var(--easePaper), box-shadow var(--durMid) var(--easePaper);
}
.valueCard:hover { transform: translateY(-3px); box-shadow: 0 8px 22px var(--colorShadow); }
.valueCard .valueIndex {
  font-family: var(--fontSerif);
  font-size: 15px;
  color: var(--colorAccentDate);
  letter-spacing: 0.24em;
}
.valueCard h3 { font-size: var(--fsH3); font-weight: 800; margin: 8px 0 8px; letter-spacing: var(--lsZhTitle); }
.valueCard p { color: var(--colorSoftInk); font-size: var(--fsSmall); max-width: 46ch; }
.valueCard.valueLarge {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 3px solid var(--colorRougeMaroon);
}
.valueCard.valueLarge h3 { font-size: clamp(20px, 2vw, 25px); }
.valueCard .valueGlyph {
  position: absolute;
  right: 22px;
  top: 20px;
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--colorAgedGold);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--colorAgedGold);
  font-family: var(--fontSerif);
  font-size: 15px;
}

.aboutTimeline {
  margin-top: 28px;
  border-top: 1px solid var(--colorBorderStrong);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.timelineItem {
  padding: 16px 14px 4px 0;
  position: relative;
}
.timelineItem::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--colorBg);
  border: 2px solid var(--colorRougeMaroon);
}
.timelineItem .tlLabel { font-weight: 700; font-size: var(--fsSmall); letter-spacing: 0.02em; }
.timelineItem .tlNote { color: var(--colorSoftInk); font-size: var(--fsMicro); margin-top: 2px; }

/* ============================== 活动 ============================== */

.filterChips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.filterChip {
  border: 1px solid var(--colorBorderStrong);
  background: transparent;
  color: var(--colorSoftInk);
  border-radius: var(--radiusChip);
  padding: 8px 16px;
  min-height: 38px;
  font-size: var(--fsMicro);
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all var(--durFast) var(--easePaper);
}
.filterChip:hover { border-color: var(--colorRougeMaroon); color: var(--colorRougeMaroon); }
.filterChip[aria-pressed="true"] {
  background: var(--colorCtaPrimary);
  border-color: var(--colorCtaPrimary);
  color: var(--colorCtaPrimaryText);
}

.eventFeatured {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 0;
  background: var(--colorCard);
  border: 1px solid var(--colorBorderStrong);
  border-radius: var(--radiusCard);
  overflow: hidden;
  margin-bottom: 18px;
}
.eventFeatured .featuredBody { padding: clamp(22px, 3vw, 36px); }
.eventFeatured .featuredMeta {
  border-left: 1px dashed var(--colorBorderStrong);
  padding: clamp(22px, 3vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  background:
    repeating-linear-gradient(-45deg, var(--colorPatternInk) 0 1px, transparent 1px 14px);
}
.eventFeatured .featuredTag {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}
.eventFeatured h3 { font-size: clamp(22px, 2.4vw, 30px); font-weight: 900; letter-spacing: var(--lsZhTitle); }
.eventFeatured .featuredSub {
  font-size: var(--fsMicro);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--colorSoftInk);
  font-weight: 600;
  margin: 4px 0 12px;
}
.eventFeatured p { color: var(--colorSoftInk); max-width: 56ch; }
.eventFeatured .featuredCtas { margin-top: 20px; display: flex; gap: 12px; flex-wrap: wrap; }
.eventMetaRow { display: flex; align-items: center; gap: 10px; font-size: var(--fsSmall); color: var(--colorSoftInk); }
.eventMetaRow .metaIcon { color: var(--colorAgedGold); flex: none; width: 18px; text-align: center; }

.eventsGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.eventCard {
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  padding: 18px;
  display: flex;
  gap: 14px;
  transition: transform var(--durMid) var(--easePaper), box-shadow var(--durMid) var(--easePaper);
}
.eventCard:hover { transform: translateY(-3px); box-shadow: 0 8px 22px var(--colorShadow); }
.eventCard .eventBody { min-width: 0; display: flex; flex-direction: column; }
.eventCard h4 { font-size: 16px; font-weight: 800; letter-spacing: var(--lsZhTitle); line-height: 1.4; }
.eventCard .eventDesc {
  color: var(--colorSoftInk);
  font-size: var(--fsMicro);
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.eventCard .eventTags { display: flex; gap: 8px; align-items: center; margin-top: 10px; flex-wrap: wrap; }
.eventCard .eventLoc { color: var(--colorSoftInk); font-size: var(--fsMicro); margin-top: 6px; }
.eventCard .eventCta {
  margin-top: 12px;
  font-size: var(--fsSmall);
  font-weight: 700;
  color: var(--colorRougeMaroon);
  text-decoration: none;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.eventCard .eventCta:hover { text-decoration: underline; text-underline-offset: 4px; }
.eventCard .eventCta.ctaMuted { color: var(--colorSoftInk); font-weight: 600; }
.eventsEmpty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--colorSoftInk);
  padding: 40px 0;
  border: 1px dashed var(--colorBorderStrong);
  border-radius: var(--radiusCard);
  font-size: var(--fsSmall);
}

/* ============================== 赞助商目录 ============================== */

.sponsorNote {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--colorSoftInk);
  font-size: var(--fsMicro);
  margin-bottom: 20px;
}
.sponsorNote::before { content: "※"; color: var(--colorAgedGold); }

.sponsorGrid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.sponsorCard {
  position: relative;
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--durMid) var(--easePaper), box-shadow var(--durMid) var(--easePaper);
}
.sponsorCard:hover { transform: translateY(-3px); box-shadow: 0 8px 22px var(--colorShadow); }
.sponsorCard.tierTitle { grid-column: span 3; border-color: var(--colorAgedGold); }
.sponsorCard.tierGold { grid-column: span 3; }
.sponsorCard.tierSilver, .sponsorCard.tierCommunity { grid-column: span 2; }

/* 目录索引标签式 tier 标记 */
.tierTab {
  position: absolute;
  top: -1px;
  right: 18px;
  background: var(--colorBgAlt);
  border: 1px solid var(--colorBorderStrong);
  border-top: none;
  border-radius: 0 0 7px 7px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--colorSoftInk);
  padding: 3px 10px 4px;
}
.sponsorCard.tierTitle .tierTab { color: var(--colorAgedGold); border-color: var(--colorAgedGold); }
.sponsorCard.tierGold .tierTab { color: var(--colorAgedGold); }

.sponsorHead { display: flex; align-items: center; gap: 12px; }
.sponsorLogo {
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 9px;
  overflow: hidden;
  display: grid;
  place-items: center;
  border: 1px solid var(--colorBorder);
  background: var(--colorBgAlt);
}
.sponsorLogo img { width: 100%; height: 100%; object-fit: contain; }
.sponsorLogo .monogram {
  font-family: var(--fontSerif);
  font-size: 19px;
  font-weight: 700;
  color: var(--colorAgedGold);
}
.sponsorCard h4 { font-size: 15.5px; font-weight: 800; line-height: 1.35; }
.sponsorCard .sponsorTagRow { display: flex; gap: 6px; margin-top: 3px; flex-wrap: wrap; }
.sponsorCard .sponsorDesc { color: var(--colorSoftInk); font-size: var(--fsMicro); }
.sponsorCard ul.benefitList { list-style: none; display: grid; gap: 4px; }
.sponsorCard ul.benefitList li {
  font-size: var(--fsMicro);
  color: var(--colorSoftInk);
  padding-left: 16px;
  position: relative;
}
.sponsorCard ul.benefitList li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--colorAgedGold);
  font-weight: 900;
}
.sponsorCard .promoCode {
  font-size: var(--fsMicro);
  color: var(--colorAccentDate);
  border: 1px dashed var(--colorAccentDate);
  border-radius: 6px;
  padding: 3px 10px;
  align-self: flex-start;
  letter-spacing: 0.1em;
}
.sponsorCard .sponsorLinks {
  margin-top: auto;
  display: flex;
  gap: 14px;
  align-items: center;
  padding-top: 8px;
}
.sponsorCard .sponsorLinks a {
  font-size: var(--fsSmall);
  font-weight: 700;
  color: var(--colorPineTeal);
  text-decoration: none;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
}
.sponsorCard .sponsorLinks a:hover { text-decoration: underline; text-underline-offset: 4px; }
.sponsorFootRow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.sponsorFootRow .disclaimer { color: var(--colorSoftInk); font-size: var(--fsMicro); }

/* ============================== 招募 ============================== */

.recruitSteps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--colorBorderStrong);
  border-radius: var(--radiusCard);
  overflow: hidden;
  margin-bottom: 26px;
  background: var(--colorCard);
}
.stepItem { padding: 18px 20px; border-left: 1px dashed var(--colorBorder); }
.stepItem:first-child { border-left: none; }
.stepItem .stepIndex {
  font-family: var(--fontSerif);
  color: var(--colorAccentDate);
  font-size: var(--fsSmall);
  letter-spacing: 0.2em;
}
.stepItem .stepTitle { font-weight: 800; font-size: 15px; margin-top: 4px; }
.stepItem .stepNote { color: var(--colorSoftInk); font-size: var(--fsMicro); margin-top: 3px; }

.recruitGrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.recruitCard {
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  overflow: hidden;
}
.recruitCard summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  min-height: 44px;
  transition: background var(--durFast) var(--easePaper);
}
.recruitCard summary::-webkit-details-marker { display: none; }
.recruitCard summary:hover { background: var(--colorBgAlt); }
.recruitCard .deptBadge {
  flex: none;
  font-size: var(--fsMicro);
  font-weight: 700;
  color: var(--colorPineTeal);
  border: 1px solid var(--colorPineTeal);
  border-radius: 6px;
  padding: 2px 9px;
  letter-spacing: 0.06em;
}
.recruitCard .recruitTitle { font-weight: 800; font-size: 15px; flex: 1; min-width: 0; }
.recruitCard .summaryChevron {
  color: var(--colorSoftInk);
  transition: transform var(--durMid) var(--easePaper);
  flex: none;
}
.recruitCard[open] .summaryChevron { transform: rotate(180deg); }
.recruitCard .recruitBody {
  padding: 4px 18px 18px;
  border-top: 1px dashed var(--colorBorder);
  font-size: var(--fsSmall);
  color: var(--colorSoftInk);
}
.recruitCard .recruitBody h5 {
  font-size: var(--fsMicro);
  letter-spacing: 0.16em;
  color: var(--colorInk);
  margin: 14px 0 6px;
  font-weight: 800;
}
.recruitCard .recruitBody ul { padding-left: 18px; display: grid; gap: 3px; }
.recruitCard .recruitDeadline { margin-top: 12px; font-size: var(--fsMicro); color: var(--colorAccentDate); font-weight: 700; }
.recruitCard .recruitApply { margin-top: 12px; }
.recruitFoot { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ============================== 赞助合作 ============================== */

.reachRow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}
.reachItem {
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  background: var(--colorCard);
  padding: 18px 20px;
}
.reachItem .reachValue {
  font-family: var(--fontSerif);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 700;
  color: var(--colorRougeMaroon);
}
.reachItem .reachLabel { font-weight: 700; font-size: var(--fsSmall); margin-top: 2px; }
.reachItem .reachNote { color: var(--colorSoftInk); font-size: 10.5px; letter-spacing: 0.06em; margin-top: 3px; }

.packageGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  align-items: stretch;
}
.packageCard {
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  transition: transform var(--durMid) var(--easePaper), box-shadow var(--durMid) var(--easePaper);
}
.packageCard:hover { transform: translateY(-3px); box-shadow: 0 8px 22px var(--colorShadow); }
.packageCard.isRecommended { border: 1.5px solid var(--colorAgedGold); }
.packageCard .recommendTab {
  position: absolute;
  top: -1px;
  right: 20px;
  background: var(--colorAgedGold);
  color: var(--colorCard);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  border-radius: 0 0 7px 7px;
  padding: 3px 12px 4px;
}
.packageCard .pkgPrice {
  font-size: var(--fsMicro);
  letter-spacing: 0.18em;
  color: var(--colorAgedGold);
  font-weight: 700;
  text-transform: uppercase;
}
.packageCard h4 { font-size: 19px; font-weight: 900; letter-spacing: 0.02em; }
.packageCard .pkgDesc { color: var(--colorSoftInk); font-size: var(--fsSmall); }
.packageCard ul { list-style: none; display: grid; gap: 7px; margin-top: 4px; }
.packageCard ul li {
  font-size: var(--fsSmall);
  color: var(--colorSoftInk);
  padding-left: 20px;
  position: relative;
}
.packageCard ul li::before {
  content: "◆";
  position: absolute;
  left: 2px;
  top: 1px;
  font-size: 8px;
  color: var(--colorAgedGold);
}
.packageCard .pkgCta { margin-top: auto; padding-top: 12px; }
.packageFootNote { margin-top: 18px; color: var(--colorSoftInk); font-size: var(--fsMicro); }

/* ============================== 新生指南 ============================== */

.guideGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.guideCard {
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--durMid) var(--easePaper), box-shadow var(--durMid) var(--easePaper);
}
.guideCard:hover { transform: translateY(-3px); box-shadow: 0 8px 22px var(--colorShadow); }
.guideCard .guideTop { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.guideCard h4 { font-size: 15.5px; font-weight: 800; letter-spacing: var(--lsZhTitle); }
.guideCard .guideSummary { color: var(--colorSoftInk); font-size: var(--fsMicro); }
.guideCard .guideLinks { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 2px; }
.guideCard .guideLinks a {
  font-size: var(--fsMicro);
  font-weight: 700;
  color: var(--colorPineTeal);
  text-decoration: none;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
}
.guideCard .guideLinks a:hover { text-decoration: underline; text-underline-offset: 4px; }
.guideCard .guideUpdated { margin-top: auto; padding-top: 8px; color: var(--colorSoftInk); font-size: 10.5px; letter-spacing: 0.06em; }
.sponsoredTag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--colorAgedGold);
  border: 1px solid var(--colorAgedGold);
  border-radius: 4px;
  padding: 1px 7px;
}
.guideFoot { margin-top: 24px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.guideFoot .disclaimer { color: var(--colorSoftInk); font-size: var(--fsMicro); }

/* ============================== FAQ ============================== */

.faqList { max-width: 780px; display: grid; gap: 10px; }
.faqItem {
  background: var(--colorCard);
  border: 1px solid var(--colorBorder);
  border-radius: var(--radiusCard);
}
.faqItem summary {
  list-style: none;
  cursor: pointer;
  padding: 15px 18px;
  min-height: 44px;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faqItem summary::-webkit-details-marker { display: none; }
.faqItem summary::after {
  content: "+";
  font-size: 18px;
  color: var(--colorSoftInk);
  transition: transform var(--durMid) var(--easePaper);
  flex: none;
}
.faqItem[open] summary::after { transform: rotate(45deg); }
.faqItem .faqAnswer {
  padding: 0 18px 16px;
  color: var(--colorSoftInk);
  font-size: var(--fsSmall);
  border-top: 1px dashed var(--colorBorder);
  padding-top: 12px;
  margin: 0 0;
}

/* ============================== Footer(版权页) ============================== */

.siteFooter {
  margin-top: var(--gapSection);
  border-top: 3px double var(--colorBorderStrong);
  background: var(--colorBgAlt);
}
.footerInner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 44px);
  padding-top: clamp(36px, 5vw, 60px);
  padding-bottom: 32px;
}
.footerBrand .brandRow { display: flex; align-items: center; gap: 12px; }
.footerBrand .brandSeal {
  width: 42px;
  height: 42px;
  border-radius: 9px;
  background: var(--colorSealBg);
  color: var(--colorSealText);
  display: grid;
  place-items: center;
  font-family: var(--fontSerif);
  font-size: 16px;
  font-weight: 700;
}
.footerBrand .fbName { font-weight: 900; letter-spacing: 0.08em; }
.footerBrand .fbSub { font-size: var(--fsMicro); color: var(--colorSoftInk); letter-spacing: 0.1em; }
.footerBrand p { color: var(--colorSoftInk); font-size: var(--fsSmall); margin-top: 14px; max-width: 40ch; }
.footerCol h4 {
  font-size: var(--fsMicro);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--colorSoftInk);
  font-weight: 800;
  margin-bottom: 14px;
}
.footerCol ul { list-style: none; display: grid; gap: 9px; }
.footerCol a {
  text-decoration: none;
  font-size: var(--fsSmall);
  color: var(--colorInk);
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footerCol a:hover { color: var(--colorRougeMaroon); text-decoration: underline; text-underline-offset: 4px; }
.footerCol .socialNote { color: var(--colorSoftInk); font-size: var(--fsMicro); }
.footerBottom {
  border-top: 1px solid var(--colorBorder);
  padding-top: 18px;
  padding-bottom: 26px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footerBottom p { color: var(--colorSoftInk); font-size: var(--fsMicro); }
.footerBottom .colophonLine {
  font-family: var(--fontSerif);
  letter-spacing: 0.12em;
}

/* ============================== 响应式 ============================== */

@media (max-width: 1023px) {
  .heroInner { grid-template-columns: 1fr; }
  .quickGrid { grid-template-columns: repeat(2, 1fr); }
  .aboutGrid { grid-template-columns: 1fr; }
  .eventsGrid { grid-template-columns: repeat(2, 1fr); }
  .eventFeatured { grid-template-columns: 1fr; }
  .eventFeatured .featuredMeta { border-left: none; border-top: 1px dashed var(--colorBorderStrong); }
  .sponsorGrid { grid-template-columns: repeat(2, 1fr); }
  .sponsorCard.tierTitle, .sponsorCard.tierGold,
  .sponsorCard.tierSilver, .sponsorCard.tierCommunity { grid-column: span 1; }
  .sponsorCard.tierTitle { grid-column: span 2; }
  .recruitSteps { grid-template-columns: repeat(2, 1fr); }
  .stepItem:nth-child(3) { border-left: none; }
  .stepItem:nth-child(n + 3) { border-top: 1px dashed var(--colorBorder); }
  .packageGrid { grid-template-columns: 1fr; }
  .guideGrid { grid-template-columns: repeat(2, 1fr); }
  .footerInner { grid-template-columns: repeat(2, 1fr); }
  .aboutTimeline { grid-template-columns: repeat(2, 1fr); gap: 0 20px; border-top: none; }
  .timelineItem { border-top: 1px solid var(--colorBorderStrong); }
}

@media (max-width: 860px) {
  .mainNav { display: none; }
  .menuToggle { display: grid; place-items: center; }
  .headerActions .btnHeaderCta { display: none; }
}

@media (max-width: 640px) {
  .brand .brandSub { display: none; }
  .quickGrid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .eventsGrid, .guideGrid, .recruitGrid, .reachRow { grid-template-columns: 1fr; }
  .sponsorGrid { grid-template-columns: 1fr; }
  .sponsorCard.tierTitle { grid-column: span 1; }
  .recruitSteps { grid-template-columns: 1fr; }
  .stepItem { border-left: none; }
  .stepItem:nth-child(n + 2) { border-top: 1px dashed var(--colorBorder); }
  .footerInner { grid-template-columns: 1fr; }
  .heroCtas .btn { flex: 1 1 auto; }
  .bannerSlide { min-height: 300px; }
}

/* ============================== 减弱动态 ============================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}