:root {
  --color-gold: #E8B33A;
  --color-gold-dark: #A67C2E;
  --color-crimson: #7A2E2E;
  --color-navy: #0D1B2A;
  --color-navy-deep: #081020;
  --color-obsidian: #111827;
  --color-neon-purple: #9D4DFF;
  --color-neon-cyan: #00E5FF;
  --color-warm-white: #F5E9D8;
  --color-gray: #9AA4B2;
  --color-amber: #FFB300;
  --font-heading: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "SF Mono", "Cascadia Code", "Consolas", monospace;
  --header-h: 68px;
  --nav-w: 240px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --content-max: 1240px;
  --ease-out: cubic-bezier(0.22, 0.68, 0.35, 1);
  --transition: 0.28s var(--ease-out);
  --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-warm-white);
  background-color: var(--color-navy);
  background-image:
    radial-gradient(ellipse 80% 42% at 82% 8%, rgba(122, 46, 46, 0.28), transparent 60%),
    radial-gradient(ellipse 60% 36% at 10% 92%, rgba(157, 77, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 60% 30% at 50% 50%, rgba(0, 229, 255, 0.05), transparent 70%),
    linear-gradient(165deg, var(--color-navy) 0%, #0a1524 55%, var(--color-obsidian) 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.22;
  color: var(--color-warm-white);
  letter-spacing: 0.02em;
}

a {
  color: var(--color-neon-purple);
}

::selection {
  background: rgba(232, 179, 58, 0.35);
  color: var(--color-warm-white);
}

:focus-visible {
  outline: 2px solid var(--color-neon-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

#main-content {
  outline: none;
  display: block;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-navy-deep);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-gold-dark), var(--color-crimson));
  border-radius: 8px;
}

/* ========= 通用容器与排版 ========= */

.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 24px;
}

.prose {
  font-size: 16px;
  line-height: 2;
  color: rgba(245, 233, 216, 0.76);
}

.prose p {
  margin-bottom: 1em;
}

.prose h2,
.prose h3 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--color-warm-white);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  padding: 14px 0;
  font-size: 13px;
  color: var(--color-gray);
}

.breadcrumb a {
  color: var(--color-warm-white);
  text-decoration: none;
  transition: color 0.2s;
}

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

.breadcrumb-sep {
  color: var(--color-gold-dark);
  opacity: 0.6;
}

/* ========= 通用按钮 ========= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(120deg, var(--color-amber), var(--color-gold));
  color: #1c0f00;
  box-shadow: 0 6px 20px rgba(232, 179, 58, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(232, 179, 58, 0.42);
}

.btn-ghost {
  background: rgba(17, 24, 35, 0.5);
  border-color: rgba(166, 124, 46, 0.42);
  color: var(--color-warm-white);
}

.btn-ghost:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* ========= 头部 ========= */

.site-header {
  position: relative;
  z-index: 1000;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 1500;
  background: linear-gradient(to right, var(--color-gold), var(--color-neon-purple), var(--color-neon-cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--color-gold);
  color: #1a0e00;
  font-weight: 700;
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.3s;
}

.skip-link:focus-visible {
  top: 12px;
}

.header-topbar {
  position: sticky;
  top: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: 24px;
  background: rgba(13, 27, 42, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(166, 124, 46, 0.24);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.26);
  overflow: hidden;
}

.header-topbar > *:not(.header-particle) {
  position: relative;
  z-index: 1;
}

.header-particle {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-warm-white);
}

.brand-seal {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(232, 179, 58, 0.22), rgba(122, 46, 46, 0.3)),
    var(--color-obsidian);
  border: 1px solid var(--color-gold-dark);
  border-radius: 10px 14px 10px 14px;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  color: var(--color-gold);
  text-shadow: 0 0 14px rgba(232, 179, 58, 0.55);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease-out);
}

.brand-mark:hover .brand-seal {
  transform: rotate(-4deg);
}

.brand-seal::after {
  content: "";
  position: absolute;
  top: 0;
  left: -70%;
  width: 50%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.22), transparent);
  transform: skewX(-20deg);
  animation: brandShine 4.2s ease-in-out infinite;
}

@keyframes brandShine {
  0%, 55% {
    left: -70%;
  }
  85%, 100% {
    left: 140%;
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0.12em;
  color: var(--color-warm-white);
}

.brand-tagline {
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--color-gold-dark);
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cta-capsule {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--color-amber), var(--color-gold));
  color: #1a0e00;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
  box-shadow: 0 4px 18px rgba(255, 179, 0, 0.32);
  transition: transform var(--transition), box-shadow var(--transition);
}

.cta-capsule::before {
  content: "◆";
  font-size: 9px;
  color: rgba(0, 0, 0, 0.5);
}

.cta-capsule:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(255, 179, 0, 0.45);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(166, 124, 46, 0.4);
  border-radius: 12px;
  cursor: pointer;
}

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

.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);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 850;
  background: rgba(8, 16, 32, 0.6);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ========= 侧边轨道导航 ========= */

.site-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: var(--nav-w);
  z-index: 900;
  display: flex;
  align-items: center;
  padding: 40px 24px 40px 28px;
  background:
    linear-gradient(150deg, rgba(122, 46, 46, 0.28), rgba(13, 27, 42, 0.92) 45%),
    rgba(17, 24, 35, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-right: 1px solid rgba(166, 124, 46, 0.28);
  box-shadow: inset -12px 0 32px rgba(0, 0, 0, 0.18);
}

.nav-list {
  list-style: none;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.nav-list::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(166, 124, 46, 0.45), rgba(157, 77, 255, 0.5), rgba(0, 229, 255, 0.22), transparent);
}

.nav-item {
  position: relative;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px 12px 34px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(245, 233, 216, 0.72);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  width: 8px;
  height: 8px;
  transform: translateY(-50%) rotate(45deg);
  background: var(--color-obsidian);
  border: 1px solid var(--color-gold-dark);
  border-radius: 2px;
  transition: all 0.3s var(--ease-out);
}

.nav-link:hover {
  color: var(--color-warm-white);
  background: rgba(232, 179, 58, 0.07);
  transform: translateX(4px);
}

.nav-link:hover::before,
.nav-link[aria-current="page"]::before {
  background: var(--color-gold);
  border-color: var(--color-gold);
  box-shadow: 0 0 12px rgba(232, 179, 58, 0.8);
  transform: translateY(-50%) rotate(45deg) scale(1.4);
}

.nav-link[aria-current="page"] {
  color: var(--color-gold);
  background: linear-gradient(90deg, rgba(232, 179, 58, 0.12), rgba(232, 179, 58, 0.02));
  border-color: rgba(166, 124, 46, 0.22);
  font-weight: 700;
}

.nav-index {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-gold-dark);
  opacity: 0.85;
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--color-neon-cyan);
}

.nav-label {
  display: block;
}

/* ========= 移动端抽屉 ========= */

@media (max-width: 1023px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-overlay {
    display: block;
  }

  .site-nav {
    width: min(320px, 82vw);
    transform: translateX(-105%);
    transition: transform 0.34s var(--ease-out);
    border-radius: 0 22px 22px 0;
    box-shadow: 24px 0 50px rgba(0, 0, 0, 0.5);
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 15px;
  }
}

@media (max-width: 420px) {
  .header-topbar {
    padding-inline: 14px;
  }

  .brand-seal {
    width: 36px;
    height: 36px;
    font-size: 19px;
  }

  .brand-name {
    font-size: 19px;
  }

  .brand-tagline {
    display: none;
  }

  .cta-capsule {
    padding: 6px 12px;
    font-size: 13px;
  }

  .cta-capsule::before {
    display: none;
  }

  .nav-toggle {
    width: 36px;
    height: 36px;
  }
}

/* ========= 页脚 ========= */

.site-footer {
  position: relative;
  margin-top: 80px;
  background:
    radial-gradient(ellipse 70% 38% at 82% 0%, rgba(122, 46, 46, 0.3), transparent 55%),
    linear-gradient(180deg, var(--color-navy-deep), #070c16 75%);
  border-top: 1px solid rgba(166, 124, 46, 0.3);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, transparent, var(--color-gold) 30%, var(--color-neon-purple) 65%, transparent);
  opacity: 0.85;
  pointer-events: none;
}

.site-footer .brand-seal::after {
  animation: none;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.6fr 1fr 0.9fr 1.2fr;
  gap: 40px;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 56px 32px 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-brand-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  color: var(--color-warm-white);
}

.footer-brand-tagline {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-gold-dark);
}

.footer-trust {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(245, 233, 216, 0.62);
  max-width: 34em;
  padding: 12px 16px;
  background: rgba(17, 24, 35, 0.5);
  border-left: 2px solid var(--color-gold-dark);
  border-radius: 0 12px 12px 0;
}

.footer-nav-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.footer-nav ul,
.footer-contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  color: rgba(245, 233, 216, 0.66);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.25s, padding-left 0.25s;
}

.footer-nav a:hover {
  color: var(--color-gold);
  padding-left: 4px;
}

.footer-contact {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 233, 216, 0.68);
}

.footer-contact-list li {
  position: relative;
  padding-left: 20px;
  word-break: break-all;
}

.footer-contact-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 6px;
  height: 6px;
  background: var(--color-gold-dark);
  transform: rotate(45deg);
}

.footer-service-time {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 6px 12px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-neon-cyan);
}

.footer-service-time span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-neon-cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.8);
  animation: livePulse 2s ease-in-out infinite;
}

@keyframes livePulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.75);
  }
}

.footer-bottom {
  border-top: 1px solid rgba(166, 124, 46, 0.16);
  padding: 20px 32px;
}

.footer-bottom-inner {
  max-width: var(--content-max);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 13px;
  color: rgba(245, 233, 216, 0.38);
}

/* ========= 返回顶部 ========= */

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(232, 179, 58, 0.4);
  background: rgba(17, 24, 35, 0.85);
  color: var(--color-gold);
  font-size: 18px;
  display: grid;
  place-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s;
  z-index: 1200;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-gold);
  color: #1a0e00;
}

/* ========= 粒子 ========= */

.particle-dot {
  position: absolute;
  bottom: -6px;
  border-radius: 50%;
  background: var(--color-gold);
  opacity: 0;
  animation-name: particleFloat;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  will-change: transform, opacity;
}

@keyframes particleFloat {
  0% {
    transform: translate3d(0, 0, 0);
    opacity: 0;
  }
  10% {
    opacity: 0.75;
  }
  80% {
    opacity: 0.2;
  }
  100% {
    transform: translate3d(20px, -120px, 0);
    opacity: 0;
  }
}

/* ========= 页面首屏与章节 ========= */

.page-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 80px) 0 48px;
}

.page-hero::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -22%;
  width: 42%;
  height: 130%;
  background: linear-gradient(135deg, rgba(122, 46, 46, 0.5), rgba(157, 77, 255, 0.16));
  transform: skewX(-14deg);
  border-radius: 24px;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-title {
  font-size: clamp(32px, 5vw, 56px);
  letter-spacing: 0.04em;
  line-height: 1.18;
}

.page-intro {
  max-width: 660px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(245, 233, 216, 0.66);
  margin-top: 14px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
  border: 1px solid rgba(166, 124, 46, 0.32);
  border-radius: 999px;
  padding: 6px 14px;
  background: rgba(232, 179, 58, 0.06);
}

.section-label::before {
  content: "◆";
  font-size: 8px;
  color: var(--color-gold);
}

.section-index {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-neon-purple);
  letter-spacing: 0.1em;
}

.section-title {
  font-size: clamp(26px, 3.6vw, 42px);
  margin-top: 12px;
}

@media (max-width: 640px) {
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ========= 卡片与网格 ========= */

.card {
  background: linear-gradient(160deg, rgba(17, 24, 35, 0.88), rgba(13, 27, 42, 0.92));
  border: 1px solid rgba(166, 124, 46, 0.2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 28px;
}

.card-glass {
  background: rgba(17, 24, 35, 0.5);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(245, 233, 216, 0.12);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

/* ========= 图片占位 ========= */

.figure-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(166, 124, 46, 0.24);
  background:
    linear-gradient(145deg, rgba(122, 46, 46, 0.28), rgba(13, 27, 42, 0.42)),
    var(--color-obsidian);
  aspect-ratio: 16 / 9;
}

.figure-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.figure-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 27, 42, 0.35), transparent 42%);
  pointer-events: none;
}

.figure-ratio-wide {
  aspect-ratio: 21 / 9;
}

.figure-ratio-square {
  aspect-ratio: 1 / 1;
}

.figure-ratio-portrait {
  aspect-ratio: 3 / 4;
}

.figure-caption {
  font-size: 12px;
  color: var(--color-gray);
  padding: 8px 4px 0;
}

/* ========= 数据与时间线 ========= */

.stat-value {
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--color-gray);
  letter-spacing: 0.08em;
}

.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-gold-dark), var(--color-neon-purple), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-gold);
  background: var(--color-navy);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(232, 179, 58, 0.6);
}

.timeline-date {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-neon-cyan);
  letter-spacing: 0.12em;
}

/* ========= 标签与筛选 ========= */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid rgba(157, 77, 255, 0.5);
  color: var(--color-neon-purple);
  background: rgba(157, 77, 255, 0.1);
}

.badge-cyan {
  border-color: rgba(0, 229, 255, 0.5);
  color: var(--color-neon-cyan);
  background: rgba(0, 229, 255, 0.08);
}

.badge-gold {
  border-color: rgba(232, 179, 58, 0.5);
  color: var(--color-gold);
  background: rgba(232, 179, 58, 0.1);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid rgba(166, 124, 46, 0.4);
  background: rgba(17, 24, 35, 0.6);
  color: rgba(245, 233, 216, 0.72);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
}

.filter-btn:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.filter-btn.is-active,
.filter-btn[aria-pressed="true"] {
  background: linear-gradient(120deg, var(--color-amber), var(--color-gold));
  color: #1c0f00;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(232, 179, 58, 0.3);
}

/* ========= 显现动画 ========= */

.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.js-enabled [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ========= 桌面端内容偏移 ========= */

@media (min-width: 1024px) {
  #main-content {
    margin-left: var(--nav-w);
  }

  .site-footer {
    margin-left: var(--nav-w);
  }
}

@media (max-width: 1200px) {
  .footer-main {
    grid-template-columns: 1.3fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 22px 32px;
  }

  .footer-bottom {
    padding-inline: 22px;
  }

  .footer-bottom-inner {
    flex-direction: column;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
    width: 40px;
    height: 40px;
  }
}

/* ========= 减少动态偏好 ========= */

@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;
    transition-delay: 0ms !important;
  }

  .js-enabled [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .back-to-top {
    transition: none;
  }
}