:root {
  --ink-deep: #07130C;
  --pitch-base: #0F3D2E;
  --pitch-light: #1B5A44;
  --gold-accent: #C8A45C;
  --gold-soft: #E5C98F;
  --cream-text: #F1EAD8;
  --muted-green: #7BA892;
  --warning-red: #E2623B;
  --overlay-dark: rgba(4, 12, 8, 0.72);
  --font-headline: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-body: "Source Serif SC", "Songti SC", "SimSun", serif;
  --font-data: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --header-h: 72px;
  --content-max: 1280px;
  --space-section: clamp(4rem, 10vw, 7.5rem);
}

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

html {
  scroll-behavior: smooth;
  background: var(--ink-deep);
}

body {
  background:
    radial-gradient(circle at 12% 8%, rgba(27, 90, 68, 0.28), transparent 34vw),
    radial-gradient(circle at 92% 18%, rgba(200, 164, 92, 0.08), transparent 26vw),
    var(--ink-deep);
  color: var(--cream-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--gold-soft);
  text-decoration: none;
  transition: color 0.24s ease;
}

a:hover {
  color: var(--gold-accent);
}

:focus-visible {
  outline: 2px solid var(--gold-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  background: var(--gold-accent);
  color: var(--ink-deep);
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 4px;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.main-wrap {
  display: block;
  width: 100%;
  overflow: clip;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid rgba(200, 164, 92, 0.18);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header[data-scrolled="true"] {
  background: var(--overlay-dark);
  border-bottom-color: rgba(200, 164, 92, 0.35);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--cream-text);
  white-space: nowrap;
}

.site-brand:hover {
  color: var(--gold-soft);
}

.site-brand__logo {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--gold-accent);
}

.site-brand__suffix {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted-green);
  text-transform: uppercase;
}

.site-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 15px;
  color: var(--cream-text);
  border-bottom: 2px solid transparent;
  letter-spacing: 0.06em;
  transition: color 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}

.site-nav__list a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-accent);
}

.site-nav__list a[aria-current="page"] {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-accent);
}

.site-nav__list .site-nav__cta {
  background: var(--gold-accent);
  color: var(--ink-deep);
  border-radius: 4px;
  border-bottom: none;
  padding: 9px 18px;
  font-weight: 900;
}

.site-nav__list .site-nav__cta:hover {
  background: var(--gold-soft);
  color: var(--ink-deep);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(200, 164, 92, 0.5);
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(200, 164, 92, 0.12);
  border-color: var(--gold-accent);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--gold-soft);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-footer {
  position: relative;
  background:
    linear-gradient(160deg, rgba(27, 90, 68, 0.24), transparent 42%),
    var(--pitch-base);
  color: var(--cream-text);
  margin-top: 2rem;
  border-top: 2px solid rgba(200, 164, 92, 0.5);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 8px;
  background: linear-gradient(90deg, transparent, var(--gold-accent));
}

.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 24px 28px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 0.7fr 1.2fr;
  gap: 36px;
  margin-bottom: 44px;
}

.site-footer__about {
  padding-right: 20px;
}

.site-footer__brand {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 28px;
  color: var(--gold-accent);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.site-footer__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted-green);
  max-width: 32em;
}

.site-footer__info-title {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
  border-bottom: 1px solid rgba(200, 164, 92, 0.3);
  padding-bottom: 8px;
  margin-bottom: 14px;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.5;
}

.site-footer__list a {
  color: var(--cream-text);
  border-bottom: 1px solid transparent;
}

.site-footer__list a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-accent);
}

.site-footer__trust {
  margin-top: 16px;
  font-size: 12px;
  color: var(--muted-green);
  border-left: 3px solid var(--gold-accent);
  padding-left: 12px;
  line-height: 1.65;
}

.site-footer__bottom {
  border-top: 1px solid rgba(200, 164, 92, 0.22);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--muted-green);
  font-family: var(--font-data);
}

.site-footer__icp {
  color: var(--muted-green);
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 15px;
  padding: 12px 22px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.24s ease, color 0.24s ease, border-color 0.24s ease, transform 0.2s ease;
  text-decoration: none;
}

.btn--solid {
  background: var(--gold-accent);
  color: var(--ink-deep);
  border-color: var(--gold-accent);
}

.btn--solid:hover {
  background: var(--gold-soft);
  color: var(--ink-deep);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--gold-soft);
  border-color: var(--gold-accent);
}

.btn--ghost:hover {
  background: rgba(200, 164, 92, 0.12);
  color: var(--gold-soft);
  transform: translateY(-2px);
}

/* 页面基础容器 */
.page-main {
  padding: var(--header-h) 0 0;
}

.page-main > .page-intro {
  margin-bottom: var(--space-section);
}

.page-intro {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 4rem) 24px 0;
}

.display-title {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(2.8rem, 9vw, 7rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--cream-text);
  max-width: 10em;
  margin-bottom: 24px;
}

.display-title em {
  font-style: normal;
  color: var(--gold-accent);
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 28px;
}

.section-head__line {
  width: 44px;
  height: 4px;
  background: var(--gold-accent);
  margin-top: 14px;
  flex-shrink: 0;
}

.section-head__title {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  color: var(--cream-text);
  line-height: 1.2;
}

.section-head__note {
  font-size: 12px;
  color: var(--muted-green);
  letter-spacing: 0.14em;
  writing-mode: vertical-rl;
  margin-left: auto;
  font-family: var(--font-data);
  text-transform: uppercase;
}

/* 斜切研究板 */
.pitch-panel {
  background: linear-gradient(145deg, rgba(27, 90, 68, 0.45), rgba(15, 61, 46, 0.9));
  border: 1px solid rgba(200, 164, 92, 0.16);
  border-radius: 0;
  padding: 28px 32px;
  position: relative;
}

.pitch-panel--slant {
  clip-path: polygon(0 0, 96% 0, 100% 7%, 100% 100%, 4% 100%, 0 93%);
  padding: 40px 38px 46px 34px;
  background:
    linear-gradient(120deg, rgba(200, 164, 92, 0.08), transparent 18%),
    linear-gradient(145deg, var(--pitch-base), #0A2E22);
}

.pitch-panel--gold-edge {
  border-left: 4px solid var(--gold-accent);
}

.label-note {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--muted-green);
  letter-spacing: 0.1em;
  line-height: 1.4;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.glow-line {
  height: 1px;
  background: linear-gradient(90deg, var(--gold-accent), transparent 70%);
  border: none;
  margin: 16px 0;
}

/* 数据表 */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1.5;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(200, 164, 92, 0.14);
  text-align: left;
}

.data-table th {
  font-family: var(--font-headline);
  font-weight: 800;
  color: var(--gold-soft);
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.1em;
  background: rgba(27, 90, 68, 0.28);
}

.data-table td {
  color: var(--cream-text);
}

.data-table tr:hover td {
  background: rgba(200, 164, 92, 0.05);
}

.stat-number {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.2rem);
  color: var(--gold-accent);
  line-height: 1;
}

/* 横向轮次主题带 */
.topic-strip {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding: 12px 4px 20px;
  scrollbar-color: var(--gold-accent) var(--pitch-light);
  scrollbar-width: thin;
}

.topic-strip__item {
  flex: 0 0 260px;
  background: rgba(15, 61, 46, 0.7);
  border: 1px solid rgba(200, 164, 92, 0.18);
  padding: 26px 22px;
  transition: transform 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}

.topic-strip__item:hover {
  transform: translateY(-6px) rotate(-1deg);
  border-color: var(--gold-accent);
  background: var(--pitch-base);
}

.topic-strip__item time,
.topic-strip__item .topic-strip__meta {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--muted-green);
}

.topic-strip__item h3 {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 20px;
  color: var(--cream-text);
  margin: 10px 0 8px;
}

.topic-strip__item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted-green);
}

/* 非对称事件网格 */
.event-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  margin-bottom: 20px;
}

.event-grid > .pitch-panel:first-child {
  transform: translateY(-20px);
  z-index: 1;
}

.event-grid > .pitch-panel:last-child {
  margin-top: 40px;
}

/* 面包屑 */
.breadcrumb {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--muted-green);
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: var(--muted-green);
}

.breadcrumb a:hover {
  color: var(--gold-soft);
}

.breadcrumb span[aria-current="page"] {
  color: var(--gold-soft);
}

/* 通用正文容器 */
.content-block {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 28px 24px;
}

.content-block > p {
  max-width: 64ch;
  margin-bottom: 1.2em;
}

.content-block h1,
.content-block h2,
.content-block h3,
.content-block h4 {
  font-family: var(--font-headline);
  font-weight: 900;
  color: var(--cream-text);
  line-height: 1.25;
  margin-top: 1.4em;
  margin-bottom: 0.5em;
}

.content-block h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  border-bottom: 1px solid rgba(200, 164, 92, 0.2);
  padding-bottom: 10px;
}

.content-block h3 {
  font-size: 1.3rem;
  color: var(--gold-soft);
}

.content-block ul,
.content-block ol {
  margin-left: 1.4em;
  margin-bottom: 1.2em;
  color: var(--cream-text);
}

.content-block code,
.content-block kbd {
  font-family: var(--font-data);
  font-size: 0.9em;
  background: rgba(27, 90, 68, 0.3);
  padding: 2px 6px;
  border-radius: 4px;
}

/* 滚动进度条 */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--pitch-light), var(--gold-accent));
  z-index: 2000;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* 图片容器基础规则 */
.image-frame {
  position: relative;
  background: var(--pitch-base);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-frame::after {
  content: attr(data-caption);
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 14px 10px;
  font-family: var(--font-headline);
  font-size: 13px;
  font-weight: 700;
  color: var(--gold-soft);
  background: linear-gradient(transparent, rgba(7, 19, 12, 0.9));
  letter-spacing: 0.08em;
}

.image-frame--portrait {
  aspect-ratio: 4 / 5;
}

.image-frame--pitch {
  aspect-ratio: 21 / 9;
}

/* 响应式 */
@media (max-width: 1024px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .event-grid {
    grid-template-columns: 1fr;
  }

  .event-grid > .pitch-panel:first-child {
    transform: none;
  }

  .event-grid > .pitch-panel:last-child {
    margin-top: 0;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .site-header__inner {
    padding: 0 16px;
  }

  .site-brand__suffix {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--overlay-dark);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(200, 164, 92, 0.3);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.3s ease;
    opacity: 0;
    visibility: hidden;
  }

  .site-nav[data-open="true"] {
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding: 12px 16px 20px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .site-nav__list a {
    font-size: 17px;
    padding: 14px 12px;
    border-bottom: 1px solid rgba(200, 164, 92, 0.12);
  }

  .site-nav__list .site-nav__cta {
    text-align: center;
    background: var(--gold-accent);
    color: var(--ink-deep);
    border-radius: 6px;
    margin-top: 8px;
  }
}

@media (max-width: 520px) {
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .pitch-panel {
    padding: 20px;
  }

  .pitch-panel--slant {
    clip-path: polygon(0 0, 92% 0, 100% 4%, 100% 100%, 8% 100%, 0 96%);
    padding: 28px 20px 34px;
  }

  .breadcrumb {
    font-size: 12px;
  }
}

@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;
    scroll-behavior: auto !important;
  }
}