:root {
  --c-deep-sea: #0B1F3F;
  --c-orange: #FF6B00;
  --c-green: #39FF14;
  --c-teal: #0A3D4A;
  --c-wine: #722F37;
  --c-indigo: #3F51B5;
  --c-light: #F5F7FA;
  --c-gray: #B0B8C4;
  --c-dark: #1A1A2E;
  --c-white: #FFFFFF;

  --font-display: "Anton", "Arial Narrow", Impact, "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-heading: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --header-height: 72px;
  --progress-height: 3px;
  --max-width: 1440px;
  --container-pad: clamp(16px, 4vw, 48px);
  --radius: 4px;
  --shadow: 0 12px 32px rgba(11, 31, 63, 0.10);
  --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  --z-scrim: 94;
  --z-drawer: 95;
  --z-header: 100;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + 12px);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-dark);
  background: var(--c-light);
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.25;
  color: var(--c-deep-sea);
}

::selection {
  background: var(--c-orange);
  color: var(--c-white);
}

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

#main-content:focus {
  outline: none;
}

/* ====== 通用布局 ====== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  position: relative;
  padding-block: clamp(48px, 8vw, 100px);
}

.section--narrow {
  max-width: 860px;
}

.section--wide {
  max-width: var(--max-width);
}

.section--dark {
  background: var(--c-deep-sea);
  color: rgba(255, 255, 255, 0.88);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--c-white);
}

.section--tinted {
  background: rgba(11, 31, 63, 0.05);
}

.section--teal {
  background: var(--c-teal);
  color: rgba(255, 255, 255, 0.88);
}

/* ====== 网格 ====== */

.grid {
  display: grid;
  gap: 24px;
}

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

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

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

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

/* ====== 按钮 ====== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  background: var(--c-orange);
  color: var(--c-white);
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
  text-align: center;
  line-height: 1.4;
}

.btn:hover,
.btn:focus-visible {
  background: var(--c-green);
  color: var(--c-deep-sea);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(57, 255, 20, 0.28);
}

.btn--ghost {
  background: transparent;
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-white);
  box-shadow: 0 10px 24px rgba(255, 107, 0, 0.24);
}

.btn--small {
  padding: 8px 18px;
  font-size: 0.8125rem;
}

/* ====== 面包屑 ====== */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-size: 0.8125rem;
  color: var(--c-gray);
  padding-block: 16px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--c-gray);
}

.breadcrumb a {
  color: var(--c-teal);
  font-weight: 500;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-orange);
}

.breadcrumb [aria-current="page"] {
  color: var(--c-dark);
  font-weight: 700;
}

/* ====== 页头 ====== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(11, 31, 63, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 107, 0, 0.18);
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--progress-height);
  background: linear-gradient(90deg, var(--c-orange), var(--c-green));
  transform: scaleX(var(--reading-progress, 0));
  transform-origin: left center;
  z-index: 2;
  pointer-events: none;
}

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

.skip-link {
  position: fixed;
  top: -96px;
  left: 16px;
  z-index: 999;
  background: var(--c-orange);
  color: var(--c-white);
  padding: 12px 22px;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 0 0 6px 6px;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 0;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--c-white);
  flex-shrink: 0;
}

.site-header__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 38px;
  padding: 0 12px;
  background: var(--c-orange);
  color: var(--c-white);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  border-radius: 3px 3px 3px 12px;
  box-shadow: 0 4px 14px rgba(255, 107, 0, 0.32);
}

.site-header__brand-body {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__brand-name {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--c-white);
}

.site-header__brand-latin {
  color: var(--c-green);
}

.site-header__brand-meta {
  margin-top: 4px;
  font-size: 0.5625rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

.site-nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 14px;
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--font-heading);
  text-decoration: none;
  transition: color var(--transition);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-green));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link[aria-current="page"],
.site-nav__link.is-spied {
  color: var(--c-white);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after,
.site-nav__link.is-spied::after {
  transform: scaleX(1);
}

.site-nav__index {
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-orange);
  line-height: 1.1;
}

.site-nav__label {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  z-index: 110;
  flex-shrink: 0;
}

.nav-toggle__bar {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-white);
  transition: transform var(--transition), opacity var(--transition), top var(--transition);
}

.nav-toggle__bar--top {
  top: 15px;
}

.nav-toggle__bar--mid {
  top: 21px;
}

.nav-toggle__bar--bot {
  top: 27px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar--top {
  top: 21px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar--mid {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar--bot {
  top: 21px;
  transform: rotate(-45deg);
}

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: var(--z-scrim);
  background: rgba(11, 31, 63, 0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav-scrim[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}

/* ====== 页脚 ====== */

.site-footer {
  position: relative;
  background: var(--c-deep-sea);
  color: rgba(255, 255, 255, 0.76);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-green) 100%);
  z-index: 1;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px var(--container-pad) 36px;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 1.625rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--c-white);
}

.site-footer__brand-latin {
  color: var(--c-green);
}

.site-footer__trust {
  margin-top: 14px;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 32em;
}

.site-footer__heading {
  position: relative;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.site-footer__heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 32px;
  height: 2px;
  background: var(--c-green);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9375rem;
}

.site-footer__list a {
  color: rgba(255, 255, 255, 0.72);
  transition: color var(--transition), padding-left var(--transition);
}

.site-footer__list a:hover,
.site-footer__list a:focus-visible {
  color: var(--c-orange);
  padding-left: 6px;
}

.site-footer__contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-footer__contact-item dt {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-green);
}

.site-footer__contact-item dd {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.72);
  word-break: break-all;
}

.site-footer__bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px var(--container-pad) 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.48);
}

/* ====== 章节标题 ====== */

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 32px;
}

.section-heading__index {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-orange);
  white-space: nowrap;
}

.section-heading__title {
  font-size: clamp(1.75rem, 4vw, 2.875rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.section-heading__title::after {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-left: 12px;
  background: var(--c-green);
  vertical-align: middle;
}

/* ====== 卡片 ====== */

.card {
  background: var(--c-white);
  border: 1px solid var(--c-gray);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 44px rgba(11, 31, 63, 0.14);
  border-color: var(--c-orange);
}

.card--accent {
  border-top: 3px solid var(--c-orange);
}

.card--data {
  background: var(--c-deep-sea);
  color: rgba(255, 255, 255, 0.88);
  border-color: rgba(255, 255, 255, 0.12);
}

.card--data h3,
.card--data h4 {
  color: var(--c-white);
}

.card--data .card__num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1;
  color: var(--c-orange);
}

/* ====== 图片容器 ====== */

.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-deep-sea) 0%, var(--c-teal) 100%);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 42%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 14px);
  pointer-events: none;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: inherit;
  pointer-events: none;
}

.media img,
.media video {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.media:hover img {
  transform: scale(1.04);
}

.media--tall {
  aspect-ratio: 4 / 5;
}

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

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

/* ====== 标签与状态 ====== */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--c-teal);
  color: var(--c-white);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.tag--accent {
  background: var(--c-orange);
  color: var(--c-white);
}

.tag--live {
  background: var(--c-green);
  color: var(--c-deep-sea);
}

.tag--wine {
  background: var(--c-wine);
  color: var(--c-white);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.6);
  animation: status-pulse 2s infinite;
}

@keyframes status-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.6);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(57, 255, 20, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0);
  }
}

/* ====== 数据表 ====== */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  background: var(--c-white);
  border-radius: 8px;
  overflow: hidden;
}

.data-table th {
  text-align: left;
  padding: 12px 14px;
  background: var(--c-deep-sea);
  color: var(--c-white);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--c-gray);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr {
  transition: background 0.2s ease;
}

.data-table tbody tr:hover {
  background: rgba(255, 107, 0, 0.06);
}

/* ====== 展示数字与文本工具 ====== */

.display-number {
  font-family: var(--font-display);
  font-weight: 100;
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--c-deep-sea);
}

.text-accent {
  color: var(--c-orange);
}

.text-live {
  color: var(--c-green);
}

.text-wine {
  color: var(--c-wine);
}

.text-muted {
  color: var(--c-gray);
}

/* ====== 显现动效 ====== */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ====== 响应式 ====== */

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

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    width: min(360px, 85vw);
    background: var(--c-deep-sea);
    border-left: 1px solid rgba(255, 107, 0, 0.3);
    box-shadow: -24px 0 48px rgba(11, 31, 63, 0.4);
    transform: translateX(100%);
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: var(--z-drawer);
    padding: 24px 24px calc(24px + env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

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

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

  .site-nav__item + .site-nav__item {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-nav__link {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 18px 10px;
  }

  .site-nav__index {
    font-size: 0.6875rem;
    min-width: 28px;
  }

  .site-nav__label {
    font-size: 1.0625rem;
  }

  .site-nav__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    bottom: 10px;
    width: 3px;
    border-radius: 0 2px 2px 0;
    background: linear-gradient(to bottom, var(--c-orange), var(--c-green));
    transform: scaleY(0);
    transform-origin: top center;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .site-nav__link:hover::before,
  .site-nav__link:focus-visible::before,
  .site-nav__link[aria-current="page"]::before,
  .site-nav__link.is-spied::before {
    transform: scaleY(1);
  }

  .site-nav__link::after {
    display: none;
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px 28px;
  }
}

@media (max-width: 639px) {
  .site-header__brand-meta {
    display: none;
  }

  .site-header__brand-name {
    font-size: 1.125rem;
  }

  .site-header__brand-mark {
    min-width: 38px;
    height: 32px;
    font-size: 0.875rem;
    padding: 0 8px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 40px;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .btn {
    width: 100%;
  }

  .btn--small {
    width: auto;
  }
}

/* ====== 动效偏好 ====== */

@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .status-dot {
    animation: none !important;
  }
}