/* ===== 全站共享样式 /assets/site.css ===== */

/* ---------- CSS 变量 ---------- */
:root {
  --color-bg: #0A1628;
  --color-surface: #14263F;
  --color-accent: #00FF88;
  --color-warning: #FF6A00;
  --color-text: #F0F5FF;
  --color-muted: #9BB0CC;
  --color-border: #1E3A5F;
  --color-cyan: #00E5FF;
  --color-purple: #7B2CFF;
  --color-bg-deep: #071121;

  --font-heading: Futura, "Futura PT", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Roboto Mono", "SFMono-Regular", "Cascadia Mono", "Noto Sans SC", "PingFang SC", monospace;

  --sidebar-width: 280px;
  --container-max: 1240px;
  --header-h-mobile: 64px;

  --radius-pill: 999px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --speed-fast: 200ms;
  --speed-base: 320ms;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse at 85% 10%, rgba(123, 44, 255, 0.07), transparent 50%),
    radial-gradient(ellipse at 8% 90%, rgba(0, 229, 255, 0.05), transparent 50%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-4);
}

li {
  margin-bottom: var(--space-1);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--space-3);
  color: var(--color-text);
}

h1 {
  font-size: clamp(44px, 6vw, 72px);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 24px;
}

p {
  margin: 0 0 var(--space-3);
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--speed-fast) var(--ease);
}

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

::selection {
  background: rgba(0, 255, 136, 0.28);
  color: var(--color-text);
}

:focus {
  outline: none;
}

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

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: 50%;
  transform: translate(-50%, -300%);
  z-index: 3000;
  background: var(--color-accent);
  color: #04101F;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(0, 255, 136, 0.35);
  transition: transform var(--speed-fast) var(--ease);
  white-space: nowrap;
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

@media (max-width: 1023px) {
  .skip-link {
    top: calc(var(--header-h-mobile) + 10px);
  }
}

/* ---------- 主内容与页脚定位 ---------- */
.site-main {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  position: relative;
  z-index: 1;
  scroll-margin-top: var(--space-4);
}

.site-footer {
  margin-left: var(--sidebar-width);
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
  position: relative;
  z-index: 1;
}

/* ---------- Header 侧边导览栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  background: rgba(10, 22, 40, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-right: 1px solid var(--color-border);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.13;
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-cyan), transparent);
  opacity: 0.35;
  pointer-events: none;
}

.site-header__bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5);
  color: var(--color-text);
  transition: opacity var(--speed-fast) var(--ease);
}

.brand:hover {
  color: var(--color-text);
  opacity: 0.85;
}

.brand__logo {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

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

.brand__name {
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.brand__mark {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-muted);
  margin-top: 2px;
}

/* ---------- 导航浮岛 ---------- */
.site-nav {
  position: relative;
  z-index: 2;
  margin: var(--space-2) var(--space-3);
  padding: var(--space-3) var(--space-2);
  background: rgba(20, 38, 63, 0.5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.site-nav::-webkit-scrollbar {
  width: 4px;
}

.site-nav::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0.02em;
  line-height: 1.4;
  transition:
    background var(--speed-fast) var(--ease),
    color var(--speed-fast) var(--ease),
    border-color var(--speed-fast) var(--ease),
    transform var(--speed-fast) var(--ease);
}

.site-nav__link:hover {
  background: rgba(20, 38, 63, 0.85);
  border-color: rgba(30, 58, 95, 0.9);
  color: var(--color-text);
}

@media (min-width: 1024px) {
  .site-nav__link:hover {
    transform: translateX(4px);
  }
}

.site-nav__link:active {
  transform: translateX(4px) scale(0.98);
}

.site-nav__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(0, 255, 136, 0.16), rgba(0, 255, 136, 0.03));
  border-color: rgba(0, 255, 136, 0.28);
  color: var(--color-accent);
  font-weight: 700;
}

.site-nav__index {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-muted);
  min-width: 22px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: var(--color-accent);
  opacity: 1;
}

.site-nav__label {
  flex: 1;
}

/* ---------- Header 状态与进度 ---------- */
.site-header__status {
  margin-top: auto;
  position: relative;
  z-index: 2;
  padding: var(--space-4) var(--space-5) var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.site-header__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
  animation: site-pulse 2.2s ease-out infinite;
}

@keyframes site-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.45);
  }
  60% {
    box-shadow: 0 0 0 8px rgba(0, 255, 136, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 136, 0);
  }
}

.site-header__progress {
  position: relative;
  z-index: 2;
  margin: 0 var(--space-5) var(--space-5);
  height: 3px;
  background: rgba(30, 58, 95, 0.5);
  border-radius: 3px;
  overflow: hidden;
}

.site-header__progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan));
  transition: width 0.1s linear;
}

/* ---------- 移动端导航切换按钮 ---------- */
.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: border-color var(--speed-fast) var(--ease), background var(--speed-fast) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--color-accent);
  background: rgba(0, 255, 136, 0.08);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--speed-fast) var(--ease), opacity var(--speed-fast) var(--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);
}

.nav-toggle__sr {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

/* ---------- Footer ---------- */
.site-footer__track {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-6) var(--space-6) var(--space-5);
  display: grid;
  grid-template-columns: 2fr 1fr 1.6fr;
  gap: var(--space-6);
}

.site-footer__name {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.site-footer__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 440px;
  margin-bottom: 0;
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 14px;
}

.site-footer__list li {
  margin: 0;
}

.site-footer__list a {
  color: var(--color-muted);
  transition: color var(--speed-fast) var(--ease), padding-left var(--speed-fast) var(--ease);
}

.site-footer__list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.site-footer__list--plain li {
  color: var(--color-muted);
  line-height: 1.6;
}

.site-footer__note {
  font-size: 12px;
  color: rgba(155, 176, 204, 0.7);
  margin-top: var(--space-3);
  margin-bottom: 0;
}

.site-footer__bottom {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-muted);
}

.site-footer__bottom p {
  margin: 0;
}

/* ---------- 正文容器 ---------- */
.page-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-7) var(--space-6) var(--space-8);
  position: relative;
}

.section {
  margin-bottom: var(--space-8);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.4;
  cursor: pointer;
  transition:
    background var(--speed-fast) var(--ease),
    border-color var(--speed-fast) var(--ease),
    color var(--speed-fast) var(--ease),
    transform var(--speed-fast) var(--ease),
    box-shadow var(--speed-fast) var(--ease);
}

.btn:hover {
  background: var(--color-border);
  border-color: var(--color-border);
  color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #04101F;
}

.btn--primary:hover {
  background: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.2);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--outline:hover {
  background: rgba(0, 255, 136, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.15);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px var(--space-3);
  font-size: 12px;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.08em;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  text-transform: uppercase;
  line-height: 1.5;
}

.tag--green {
  color: var(--color-accent);
  border-color: rgba(0, 255, 136, 0.3);
  background: rgba(0, 255, 136, 0.06);
}

.tag--orange {
  color: var(--color-warning);
  border-color: rgba(255, 106, 0, 0.3);
  background: rgba(255, 106, 0, 0.06);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: 13px;
  font-family: var(--font-body);
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.breadcrumbs a {
  color: var(--color-muted);
  transition: color var(--speed-fast) var(--ease);
}

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

.breadcrumbs__sep {
  color: var(--color-border);
  margin: 0 var(--space-1);
}

.breadcrumbs__current {
  color: var(--color-text);
  font-weight: 700;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space-4);
}

.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));
}

.grid--gap-lg {
  gap: var(--space-6);
}

/* ---------- 卡片 ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition:
    border-color var(--speed-fast) var(--ease),
    box-shadow var(--speed-fast) var(--ease),
    transform var(--speed-fast) var(--ease);
}

.card:hover {
  border-color: rgba(0, 255, 136, 0.25);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  transform: translateY(-3px);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.card__meta {
  font-size: 13px;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

.card__value {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

/* ---------- 图片占位容器 ---------- */
.media-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-surface), #0d1c31);
  border: 1px solid var(--color-border);
}

.media-frame::before {
  content: "";
  display: block;
}

.media-frame--hero::before {
  padding-top: 56.25%;
}

.media-frame--portrait::before {
  padding-top: 125%;
}

.media-frame--square::before {
  padding-top: 100%;
}

.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 13px;
  font-family: var(--font-body);
  letter-spacing: 0.1em;
}

/* ---------- 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.55s ease,
    transform 0.55s ease;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 1024px) and (max-width: 1279px) {
  :root {
    --sidebar-width: 240px;
  }

  .brand__logo {
    width: 38px;
    height: 38px;
  }

  .brand__name {
    font-size: 18px;
  }

  .site-nav__link {
    font-size: 13px;
    padding: var(--space-2) var(--space-3);
  }

  .site-footer__track {
    gap: var(--space-4);
  }
}

@media (max-width: 1023px) {
  html {
    scroll-padding-top: calc(var(--header-h-mobile) + var(--space-3));
  }

  .site-main,
  .site-footer {
    margin-left: 0;
  }

  .site-header {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    min-height: var(--header-h-mobile);
    background: rgba(10, 22, 40, 0.96);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .site-header::before {
    display: none;
  }

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

  .site-header__bar {
    height: var(--header-h-mobile);
    padding: 0 var(--space-4);
  }

  .brand {
    padding: 0;
  }

  .brand__logo {
    width: 36px;
    height: 36px;
  }

  .brand__name {
    font-size: 18px;
  }

  .brand__mark {
    font-size: 11px;
  }

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

  .site-nav {
    position: fixed;
    top: var(--header-h-mobile);
    left: 0;
    right: 0;
    bottom: auto;
    z-index: 1200;
    display: none;
    max-height: calc(100vh - var(--header-h-mobile));
    overflow-y: auto;
    margin: 0;
    padding: var(--space-3);
    background: rgba(10, 22, 40, 0.98);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    border: none;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }

  .site-nav[data-open] {
    display: block;
  }

  .site-nav__link {
    font-size: 15px;
    padding: var(--space-2) var(--space-4);
  }

  .site-header__status,
  .site-header__progress {
    display: none;
  }

  .site-footer__track {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding: var(--space-5) var(--space-4);
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-3) var(--space-4);
  }

  .page-container {
    padding: var(--space-5) var(--space-4) var(--space-7);
  }

  .section {
    margin-bottom: var(--space-6);
  }
}

@media (max-width: 767px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: var(--space-4);
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 26px;
  }
}

/* ---------- 减少动态 ---------- */
@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;
  }

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

  .site-header__pulse {
    animation: none;
  }
}