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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd,
pre,
ul,
ol,
li {
  margin: 0;
}

ul[class],
ol[class] {
  list-style: none;
  padding: 0;
}

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

address {
  font-style: normal;
}

:root {
  --space-900: #060D1F;
  --space-800: #0B1B3A;
  --space-700: #122855;
  --space-600: #1D3B75;
  --silver-100: #E8ECF1;
  --silver-300: #C0C7D1;
  --silver-500: #8A94A6;
  --neon-500: #FF6A00;
  --neon-400: #FF7A1A;
  --alarm-500: #D93636;
  --glass-100: rgba(255, 255, 255, 0.12);
  --glass-200: rgba(255, 255, 255, 0.08);
  --line-soft: rgba(192, 199, 209, 0.18);
  --line-strong: rgba(192, 199, 209, 0.35);
  --grad-hero: linear-gradient(135deg, #0B1B3A 0%, #1D3B75 100%);
  --grad-orange: linear-gradient(135deg, #FF6A00 0%, #FF9A3C 100%);
  --font-display: "Inter", "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --fs-hero: clamp(3rem, 8vw, 6rem);
  --fs-section: clamp(2rem, 4vw, 3rem);
  --fs-card: clamp(1.2rem, 2vw, 1.8rem);
  --fs-body: 1rem;
  --fs-caption: 0.875rem;
  --space-section: clamp(4rem, 10vh, 8rem);
  --radius-card: 1.5rem;
  --radius-pill: 999px;
  --shadow-panel: 0 24px 50px rgba(6, 13, 31, 0.5);
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--silver-300);
  background: var(--space-800);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.25;
  color: #ffffff;
  margin: 0 0 1rem;
}

p {
  color: var(--silver-300);
}

a {
  color: var(--neon-500);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #ffffff;
}

:focus-visible {
  outline: 3px solid var(--neon-500);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--neon-500);
  color: var(--space-900);
}

.skip-bridge {
  position: fixed;
  top: 0.875rem;
  left: 0.875rem;
  z-index: 10000;
  transform: translateY(-240%);
  font-family: var(--font-display);
  font-weight: 700;
  background: var(--neon-500);
  color: var(--space-900);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  box-shadow: 0 6px 24px rgba(255, 106, 0, 0.6);
  text-decoration: none;
  transition: transform 0.2s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  z-index: 10001;
  background: var(--grad-orange);
  box-shadow: 0 0 12px rgba(255, 106, 0, 0.55);
  pointer-events: none;
}

.main-content {
  min-height: 62vh;
}

.page-wrap {
  width: min(100%, 92rem);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

.section-space {
  padding-block: var(--space-section);
}

/* ===================== 头部 ===================== */

.site-mast {
  position: sticky;
  top: 0;
  z-index: 94;
  padding-top: 0.875rem;
  pointer-events: none;
}

.site-mast .mast-inner,
.site-mast .brand-lock,
.site-mast .nav-capsule,
.site-mast .nav-trigger {
  pointer-events: auto;
}

.mast-veil {
  position: absolute;
  inset: -1.5rem -1rem 0;
  background:
    radial-gradient(ellipse 55% 90% at 18% -20%, rgba(29, 59, 117, 0.35) 0%, transparent 100%),
    radial-gradient(ellipse 60% 100% at 85% -20%, rgba(255, 106, 0, 0.08) 0%, transparent 100%);
  pointer-events: none;
}

.mast-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand-lock {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-lock__sigil {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--neon-500);
  background: linear-gradient(135deg, #0B1B3A 0%, #1D3B75 100%);
  border: 1px solid rgba(255, 106, 0, 0.6);
  box-shadow: 0 0 18px rgba(255, 106, 0, 0.25);
}

.brand-lock__body {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-lock__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.brand-lock__caption {
  font-size: 0.63rem;
  font-weight: 400;
  color: var(--silver-300);
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.nav-capsule {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.45rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid var(--line-soft);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 34px rgba(6, 13, 31, 0.35);
}

.nav-capsule__link {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--silver-300);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.nav-capsule__link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
}

.nav-capsule__link[aria-current="page"] {
  color: var(--neon-500);
  font-weight: 700;
  box-shadow: inset 0 -1px 0 rgba(255, 106, 0, 0.45);
}

.nav-capsule__cta {
  margin-left: 0.5rem;
  text-decoration: none;
}

.nav-trigger {
  display: none;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--line-strong);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-trigger:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: var(--neon-500);
}

.nav-trigger span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--silver-300);
  transition: transform 0.25s ease, opacity 0.25s ease, background 0.2s ease;
}

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

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

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

.nav-trigger[aria-expanded="true"] span {
  background: var(--neon-500);
}

/* ===================== 页脚 ===================== */

.site-foot {
  position: relative;
  background: var(--space-900);
  border-top: 1px solid rgba(192, 199, 209, 0.12);
  margin-top: var(--space-section);
}

.foot-halo {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(72rem, 90%);
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 106, 0, 0.8) 50%, transparent 100%);
  box-shadow: 0 0 12px rgba(255, 106, 0, 0.5);
}

.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.3fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  padding-block: clamp(3rem, 6vh, 4.5rem) 2.75rem;
}

.foot-brief {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: flex-start;
}

.brand-lock--foot .brand-lock__title {
  color: #ffffff;
}

.brand-lock--foot .brand-lock__caption {
  color: var(--silver-500);
}

.foot-claim {
  max-width: 26rem;
  font-size: 0.9375rem;
  color: var(--silver-500);
  line-height: 1.8;
}

.foot-links,
.foot-contact {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  align-items: flex-start;
}

.foot-heading {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--silver-300);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.foot-links a {
  font-size: 0.9375rem;
  color: var(--silver-500);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.foot-links a:hover {
  color: var(--neon-500);
  padding-left: 0.35rem;
}

.foot-contact__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9375rem;
  color: var(--silver-500);
  line-height: 1.75;
}

.foot-contact__list a {
  color: var(--silver-500);
  text-decoration: none;
  transition: color 0.2s ease;
}

.foot-contact__list a:hover {
  color: var(--neon-500);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1.5rem;
  border-top: 1px solid rgba(192, 199, 209, 0.09);
}

.foot-legal p {
  margin: 0;
  font-size: 0.8125rem;
  color: rgba(192, 199, 209, 0.55);
}

.foot-legal a {
  color: rgba(192, 199, 209, 0.55);
}

.foot-legal a:hover {
  color: var(--neon-500);
}

/* ===================== 通用按钮 ===================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.1s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--grad-orange);
  color: var(--space-900);
  border-color: rgba(255, 122, 26, 0.5);
  box-shadow: 0 6px 22px rgba(255, 106, 0, 0.3);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #FF7A1A 0%, #FFAB5C 100%);
  color: var(--space-900);
  box-shadow: 0 10px 30px rgba(255, 106, 0, 0.45);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  color: var(--silver-300);
  border-color: var(--line-strong);
  box-shadow: none;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border-color: var(--neon-500);
}

.btn--small {
  padding: 0.55rem 1.25rem;
  font-size: 0.8125rem;
}

/* ===================== 面包屑 ===================== */

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding-block: 1rem 0.25rem;
  font-size: 0.875rem;
  color: var(--silver-500);
}

.breadcrumbs .crumb {
  color: var(--silver-300);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs .crumb:hover {
  color: var(--neon-500);
}

.breadcrumbs .crumb[aria-current="page"] {
  color: var(--neon-500);
  font-weight: 700;
}

.crumb-sep {
  color: var(--silver-500);
  opacity: 0.6;
}

/* ===================== 图片容器 ===================== */

.media-plate {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background:
    repeating-linear-gradient(0deg, transparent 0 10px, rgba(192, 199, 209, 0.04) 10px 11px),
    var(--grad-hero);
  border: 1px solid var(--line-soft);
  aspect-ratio: 4 / 3;
}

.media-plate::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 106, 0, 0.12) 0%, rgba(29, 59, 117, 0.12) 40%, rgba(11, 27, 58, 0.25) 100%);
  z-index: 1;
}

.media-plate img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

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

/* ===================== 网格工具 ===================== */

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 2vw, 2rem);
}

.grid-stack {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.span-3 {
  grid-column: span 3;
}

.span-4 {
  grid-column: span 4;
}

.span-6 {
  grid-column: span 6;
}

.span-8 {
  grid-column: span 8;
}

/* ===================== 基础组件 ===================== */

.glass-card {
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}

.glass-card:hover {
  border-color: rgba(255, 106, 0, 0.5);
  box-shadow: 0 0 40px rgba(255, 106, 0, 0.08);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--space-900);
  background: var(--neon-500);
}

.tag--silver {
  background: rgba(192, 199, 209, 0.15);
  color: var(--silver-300);
  border: 1px solid var(--line-soft);
}

.note {
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--neon-500);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 0 1rem 1rem 0;
  font-size: 0.9375rem;
  color: var(--silver-300);
}

.note--warn {
  border-left-color: var(--alarm-500);
  background: rgba(217, 54, 54, 0.08);
}

.note--warn strong {
  color: var(--alarm-500);
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line-soft);
  font-size: 0.8125rem;
  color: var(--silver-300);
}

.stat-pill strong {
  color: var(--neon-500);
  font-family: var(--font-display);
  font-size: 1rem;
}

.prose {
  max-width: 46rem;
}

.prose h2 {
  font-size: var(--fs-card);
  margin-top: 2.5rem;
}

.prose h3 {
  font-size: 1.35rem;
  margin-top: 2rem;
}

.prose p {
  margin-bottom: 1.25rem;
  color: var(--silver-300);
  line-height: 1.85;
}

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

@media (max-width: 1199px) {
  .grid-stack {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991px) {
  .site-mast {
    padding-top: 0.625rem;
  }

  .nav-trigger {
    display: inline-flex;
  }

  .nav-capsule {
    display: none;
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem;
    border-radius: 1.5rem;
    background: rgba(6, 13, 31, 0.94);
    border: 1px solid var(--line-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 28px 60px rgba(0, 0, 0, 0.6);
  }

  .nav-capsule[data-open] {
    display: flex;
  }

  .nav-capsule__link {
    padding: 0.8rem 1rem;
    border-radius: 0.75rem;
    font-size: 0.9375rem;
  }

  .nav-capsule__cta {
    margin-left: 0;
    margin-top: 0.5rem;
    justify-content: center;
  }

  .foot-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .foot-brief {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  .grid-12 {
    grid-template-columns: 1fr;
  }

  .span-3,
  .span-4,
  .span-6,
  .span-8 {
    grid-column: span 1;
  }

  .grid-stack {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .foot-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .foot-brief {
    grid-column: span 1;
  }

  .foot-legal {
    flex-direction: column;
    align-items: flex-start;
  }

  .brand-lock__caption {
    letter-spacing: 0.08em;
  }
}

@media (max-width: 480px) {
  .mast-inner {
    gap: 0.75rem;
  }

  .brand-lock__title {
    font-size: 1.15rem;
  }

  .brand-lock__sigil {
    width: 2.2rem;
    height: 2.2rem;
    font-size: 1.1rem;
  }
}

/* ===================== 动效与无障碍 ===================== */

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