@charset "UTF-8";

/* ============ 1. 变量 ============ */
:root {
  --c-green: #00A651;
  --c-green-deep: #006B3D;
  --c-orange: #FF6B00;
  --c-bg: #121212;
  --c-surface: #1E1E1E;
  --c-surface-alt: #2A2A2A;
  --c-white: #FFFFFF;
  --c-gray: #B0B0B0;
  --c-data: #00E676;
  --c-line: #3A3A3A;
  --c-footer-bg: #0A0A0A;

  --font-sans: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "JetBrains Mono", monospace;

  --container: 1280px;
  --gutter: clamp(16px, 4vw, 32px);

  --ts-fast: 0.2s ease;
  --ts-slow: 0.35s ease;
}

/* ============ 2. 重置 ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--c-white);
  background: var(--c-bg);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: var(--c-green);
  text-decoration: none;
  transition: color var(--ts-fast);
}

a:hover {
  color: var(--c-white);
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: 1;
  border: none;
  background: none;
  cursor: pointer;
}

/* ============ 3. 基础排版 ============ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 900;
  line-height: 1.2;
  color: var(--c-white);
  margin-bottom: 0.5em;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

h3 {
  font-size: clamp(1.125rem, 1.5vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 1em;
}

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

/* ============ 4. 布局工具 ============ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  width: 100%;
}

.section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-green);
  margin-bottom: 16px;
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--c-green);
  flex: none;
}

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

.grid-cols-2 {
  grid-template-columns: 1fr;
}

.grid-cols-3 {
  grid-template-columns: 1fr;
}

.grid-cols-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

.divider {
  height: 1px;
  border: none;
  background: var(--c-line);
  margin: 32px 0;
}

.list-plain {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#main-content {
  scroll-margin-top: 140px;
}

/* ============ 5. 媒体与图片容器 ============ */
.media {
  position: relative;
  overflow: hidden;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  aspect-ratio: 16 / 9;
}

.media img,
.media [data-media-image] {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--ts-slow);
}

.media:hover img,
.media:hover [data-media-image] {
  transform: scale(1.03);
}

.media[data-ratio="4:3"] {
  aspect-ratio: 4 / 3;
}

.media[data-ratio="3:4"] {
  aspect-ratio: 3 / 4;
}

.media[data-ratio="1:1"] {
  aspect-ratio: 1 / 1;
}

.media[data-ratio="21:9"] {
  aspect-ratio: 21 / 9;
}

.media-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gray);
  background: linear-gradient(120deg, var(--c-green-deep) 0%, var(--c-surface) 70%);
}

/* ============ 6. 按钮 ============ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--c-white);
  border: none;
  cursor: pointer;
  transition: background-color var(--ts-fast), color var(--ts-fast), border-color var(--ts-fast), transform var(--ts-fast);
}

.btn-cta {
  background: var(--c-orange);
  color: var(--c-white);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.btn-cta:hover {
  background: #E85F00;
  color: var(--c-white);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--c-green);
  color: var(--c-white);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.btn-primary:hover {
  background: var(--c-green-deep);
  color: var(--c-white);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--c-white);
  border: 1px solid var(--c-line);
}

.btn-ghost:hover {
  border-color: var(--c-green);
  color: var(--c-white);
}

/* ============ 7. 内容组件 ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-gray);
  margin-bottom: 24px;
}

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

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

.breadcrumb a {
  color: var(--c-green);
  text-decoration: none;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--c-gray);
}

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  padding: 24px;
  transition: background-color var(--ts-fast), border-color var(--ts-fast), transform var(--ts-fast);
}

.card:hover {
  background: var(--c-surface-alt);
  border-color: var(--c-green);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-gray);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--c-line);
  color: var(--c-gray);
  background: var(--c-surface);
}

.tag-green {
  border-color: rgba(0, 166, 81, 0.4);
  color: var(--c-green);
}

.tag-orange {
  border-color: rgba(255, 107, 0, 0.4);
  color: var(--c-orange);
}

/* ============ 8. 头部 ============ */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 2000;
  background: var(--c-orange);
  color: var(--c-white);
  padding: 12px 20px;
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: top var(--ts-fast);
}

.skip-link:focus {
  top: 12px;
  color: var(--c-white);
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--c-green), var(--c-orange));
  z-index: 3000;
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
}

.header-masthead {
  position: relative;
  background: var(--c-bg);
}

.header-masthead::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 4px;
  background: linear-gradient(90deg, var(--c-green), var(--c-orange));
  z-index: 1;
}

.header-masthead-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  min-height: 84px;
}

.header-side {
  display: flex;
  align-items: center;
}

.header-side-left {
  justify-self: start;
}

.header-side-right {
  justify-self: end;
  gap: 12px;
}

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

.brand:hover {
  color: var(--c-white);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--c-green);
  color: var(--c-white);
  font-weight: 900;
  font-size: 1.25rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.brand-tagline {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  letter-spacing: 0.32em;
  color: var(--c-gray);
  margin-top: 2px;
}

.brand-masthead .brand-name {
  font-size: 1.625rem;
}

/* 实时指示器 */
.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--c-data);
  border: 1px solid rgba(0, 230, 118, 0.25);
  background: rgba(0, 230, 118, 0.05);
  padding: 6px 12px;
}

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-data);
  box-shadow: 0 0 8px rgba(0, 230, 118, 0.6);
  flex: none;
  animation: live-pulse 2s ease-in-out infinite;
}

.live-text {
  white-space: nowrap;
}

/* 导航区 */
.header-nav {
  background: var(--c-bg);
}

.header-nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  border-top: 1px solid var(--c-line);
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 14px 22px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--c-gray);
  text-decoration: none;
  transition: color var(--ts-fast);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 2px;
  background: var(--c-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--ts-fast);
}

.nav-list a:hover {
  color: var(--c-white);
}

.nav-list a:hover::after {
  transform: scaleX(1);
}

.nav-list a[aria-current="page"] {
  color: var(--c-white);
}

.nav-list a[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-index {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  color: var(--c-gray);
  pointer-events: none;
}

.header-index span + span::before {
  content: "·";
  margin: 0 8px;
  color: var(--c-line);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  padding: 10px;
  cursor: pointer;
  transition: border-color var(--ts-fast);
}

.nav-toggle:hover {
  border-color: var(--c-green);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-white);
  transition: transform var(--ts-fast), opacity var(--ts-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

/* ============ 9. 页脚 ============ */
.site-footer {
  background: var(--c-footer-bg);
  border-top: 2px solid var(--c-green);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.6fr;
  gap: 40px;
  padding: 56px 0 44px;
}

.footer-block {
  min-width: 0;
}

.footer-brand .brand {
  margin-bottom: 20px;
}

.brand-footer .brand-name {
  font-size: 1.375rem;
}

.footer-about {
  font-size: 0.875rem;
  color: var(--c-gray);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-trust {
  border-left: 3px solid var(--c-orange);
  padding-left: 16px;
  font-size: 0.8125rem;
  color: var(--c-gray);
}

.footer-trust-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-orange);
  margin-bottom: 6px;
}

.footer-heading {
  font-size: 0.875rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--c-white);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  position: relative;
}

.footer-heading::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--c-green);
}

.footer-list li {
  margin-bottom: 10px;
}

.footer-list a {
  color: var(--c-gray);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--ts-fast), padding-left var(--ts-fast);
}

.footer-list a:hover {
  color: var(--c-white);
  padding-left: 4px;
}

.footer-contact-list {
  margin: 0;
  padding: 0;
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(58, 58, 58, 0.6);
}

.footer-contact-label {
  flex: none;
  width: 56px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--c-orange);
  padding-top: 3px;
}

.footer-contact-value {
  font-size: 0.8125rem;
  color: var(--c-gray);
  word-break: break-all;
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid var(--c-line);
  background: var(--c-bg);
  padding: 16px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-copyright,
.footer-icp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-gray);
}

.footer-icp {
  text-decoration: none;
  transition: color var(--ts-fast);
}

.footer-icp:hover {
  color: var(--c-white);
}

.back-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  color: var(--c-gray);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 6px 12px;
  cursor: pointer;
  transition: color var(--ts-fast), border-color var(--ts-fast);
}

.back-top:hover {
  color: var(--c-green);
  border-color: var(--c-green);
}

/* ============ 10. 焦点与无障碍 ============ */
:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

/* ============ 11. 响应式 ============ */
@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 48px 0 36px;
  }

  #main-content {
    scroll-margin-top: 120px;
  }
}

@media (max-width: 768px) {
  .header-masthead-inner {
    grid-template-columns: 1fr auto;
    gap: 12px;
    min-height: 64px;
  }

  .header-side-left {
    display: none;
  }

  .brand-masthead {
    justify-self: start;
  }

  .brand-masthead .brand-name {
    font-size: 1.1875rem;
  }

  .brand-tagline {
    letter-spacing: 0.18em;
  }

  .header-side-right {
    justify-self: end;
  }

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

  .header-nav-inner {
    display: block;
    border-top: none;
    padding-top: 0;
  }

  .site-nav {
    display: none;
    justify-content: stretch;
  }

  .site-nav[data-open="true"] {
    display: block;
    background: var(--c-surface);
    border-top: 1px solid var(--c-line);
    border-bottom: 1px solid var(--c-line);
  }

  .nav-list {
    flex-direction: column;
    padding: 4px 0;
  }

  .nav-list a {
    padding: 12px 20px;
    border-bottom: 1px solid rgba(58, 58, 58, 0.4);
  }

  .nav-list a:last-child {
    border-bottom: none;
  }

  .nav-list a::after {
    left: 20px;
    right: 20px;
    bottom: 0;
  }

  .header-index {
    display: none;
  }

  #main-content {
    scroll-margin-top: 70px;
  }

  .live-indicator {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 0 32px;
  }

  .footer-bottom-inner {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }

  .brand-masthead .brand-name {
    font-size: 1.0625rem;
  }

  .btn-cta {
    padding: 8px 14px;
    font-size: 0.75rem;
  }

  .nav-toggle {
    width: 38px;
    height: 38px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    gap: 8px;
  }
}

/* ============ 12. 动效约束 ============ */
@keyframes live-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

@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;
  }

  .live-dot {
    animation: none;
  }

  .card:hover {
    transform: none;
  }

  .media:hover img,
  .media:hover [data-media-image] {
    transform: none;
  }
}