/* ==========================================================================
   a9看台 · 共享外壳样式  /assets/site.css
   场域深绿底 + 荧光黄绿数据色 + 暖橙指标点缀 + 极细边界与斜切面板
   ========================================================================== */

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

html {
  margin: 0;
  padding: 0;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background-color: #06251a;
  color: #f4f8ef;
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

img, svg, video {
  max-width: 100%;
}

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

button {
  font: inherit;
  color: inherit;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* ---------- CSS 变量 ---------- */
:root {
  --ink-950: #03150e;
  --ink-900: #06251a;
  --panel-800: #0a3a27;
  --edge-700: #10543a;
  --lime-400: #c7ff3e;
  --lime-200: #e6ff9e;
  --orange-500: #ff8a3d;
  --paper-050: #f4f8ef;
  --mist-300: #a9c4b1;
  --line-500: #2a5a44;
  --focus: #ffffff;

  --font-display: "Archivo Black", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", "SFMono-Regular", ui-monospace, monospace;

  --shell: min(1240px, calc(100% - 3rem));
  --header-h: 84px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.32s;
}

/* ---------- 基础排版 ---------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.2rem, 4.2vw, 4rem);
}

h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  letter-spacing: -0.02em;
}

p {
  max-width: 72ch;
}

strong {
  font-weight: 700;
}

::selection {
  background-color: var(--lime-400);
  color: var(--ink-950);
}

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

/* ---------- 通用工具 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  font-feature-settings: "tnum" 1, "lnum" 1;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background-color: var(--lime-400);
}

.content-shell {
  width: var(--shell);
  margin-inline: auto;
}

.page-main {
  display: block;
  padding-top: calc(var(--header-h) + clamp(1rem, 3vw, 2rem));
}

.page-main--flush {
  padding-top: 0;
}

/* ---------- 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--paper-050);
  --btn-bd: var(--line-500);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.55rem 1.2rem;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  color: var(--btn-fg);
  background-color: var(--btn-bg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn--primary {
  --btn-bg: var(--lime-400);
  --btn-fg: var(--ink-950);
  --btn-bd: var(--lime-400);
  font-weight: 700;
}

.btn--primary:hover {
  --btn-bg: var(--lime-200);
  --btn-bd: var(--lime-200);
}

.btn--ghost {
  --btn-fg: var(--paper-050);
  --btn-bd: var(--edge-700);
  background-color: rgba(16, 84, 58, 0.38);
}

.btn--ghost:hover {
  --btn-bd: var(--lime-400);
  color: var(--lime-200);
}

.btn--sm {
  min-height: 36px;
  padding: 0.4rem 0.85rem;
  font-size: 0.84rem;
}

/* ---------- 跳至主要内容 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 0.65rem 1.1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-950);
  background-color: var(--lime-400);
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease);
}

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

/* ---------- 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  color: var(--paper-050);
  background-image: linear-gradient(
    180deg,
    rgba(3, 21, 14, 0.94) 0%,
    rgba(3, 21, 14, 0.58) 62%,
    rgba(3, 21, 14, 0) 100%
  );
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.site-header.is-stuck {
  background-color: rgba(6, 37, 26, 0.97);
  background-image: none;
  border-bottom-color: var(--line-500);
  box-shadow: 0 12px 32px -22px rgba(0, 0, 0, 0.95);
}

.header-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  background-color: rgba(42, 90, 68, 0.4);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.site-header.is-stuck .header-rail {
  opacity: 1;
}

.header-rail__fill {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--lime-400), var(--orange-500));
  box-shadow: 0 0 12px rgba(199, 255, 62, 0.6);
  transition: width 0.1s linear;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 2.25rem);
  width: var(--shell);
  min-height: var(--header-h);
  margin-inline: auto;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  color: inherit;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink-950);
  background-color: var(--lime-400);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-300);
}

/* 轮次刻度装饰 */
.header-tick {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  margin: 0;
  padding-left: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--mist-300);
  border-left: 1px solid var(--line-500);
}

.header-tick::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--lime-400);
  box-shadow: 0 0 0 4px rgba(199, 255, 62, 0.16);
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 2rem);
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  counter-reset: nav;
}

.site-nav__list > li {
  counter-increment: nav;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 0.55rem 0.78rem;
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--mist-300);
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link:hover {
  color: var(--paper-050);
  background-color: rgba(199, 255, 62, 0.08);
}

.site-nav__link[aria-current="page"] {
  color: var(--lime-400);
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.78rem;
  right: 0.78rem;
  bottom: 0.16rem;
  height: 2px;
  background-color: var(--lime-400);
  box-shadow: 0 0 10px rgba(199, 255, 62, 0.6);
}

.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-left: 1rem;
  border-left: 1px solid var(--line-500);
}

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  min-height: 44px;
  padding: 0.4rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--paper-050);
  background-color: rgba(16, 84, 58, 0.5);
  border: 1px solid var(--edge-700);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--lime-400);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  background-color: var(--lime-400);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.nav-toggle__label {
  line-height: 1;
}

/* 抽屉遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 110;
  background-color: rgba(3, 21, 14, 0.74);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s var(--ease), visibility 0.28s var(--ease);
}

.nav-scrim[data-open] {
  opacity: 1;
  visibility: visible;
}

body.nav-open {
  overflow: hidden;
}

/* ---------- 堆叠面板基础件 ---------- */
.panel {
  position: relative;
  padding: clamp(1.25rem, 2.6vw, 2.25rem);
  background-color: var(--panel-800);
  border: 1px solid var(--line-500);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 44px -36px rgba(0, 0, 0, 0.95);
}

.panel--edge {
  border-left: 3px solid var(--lime-400);
}

.panel__index {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.28rem 0.62rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--mist-300);
  background-color: rgba(3, 21, 14, 0.55);
  border-left: 1px solid var(--line-500);
  border-bottom: 1px solid var(--line-500);
  border-top-right-radius: var(--radius-md);
  border-bottom-left-radius: 8px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist-300);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--line-500);
}

.breadcrumb a {
  color: var(--mist-300);
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover {
  color: var(--lime-400);
}

.breadcrumb [aria-current="page"] {
  color: var(--paper-050);
}

/* ---------- 媒体容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-500);
  border-radius: var(--radius-md);
  background-color: var(--panel-800);
  background-image:
    linear-gradient(135deg, rgba(16, 84, 58, 0.65), rgba(3, 21, 14, 0.92)),
    repeating-linear-gradient(45deg, rgba(199, 255, 62, 0.07) 0 2px, transparent 2px 14px);
}

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

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

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

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

.media-frame--slant {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
}

/* ---------- 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  padding: clamp(2.75rem, 5vw, 4.5rem) 0 1.75rem;
  color: var(--paper-050);
  background-color: var(--ink-950);
  border-top: 1px solid var(--line-500);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 140px;
  background-image: linear-gradient(180deg, rgba(16, 84, 58, 0.6), rgba(3, 21, 14, 0));
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
  pointer-events: none;
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns:
    minmax(0, 1.6fr)
    minmax(0, 0.8fr)
    minmax(0, 0.8fr)
    minmax(0, 0.9fr)
    minmax(0, 1.35fr);
  gap: clamp(1.75rem, 3.2vw, 3rem);
  width: var(--shell);
  margin-inline: auto;
}

/* 页脚品牌 */
.footer-brand {
  min-width: 0;
}

.footer-brand__lock {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
}

.footer-brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--ink-950);
  background-color: var(--lime-400);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.footer-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.footer-brand__sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist-300);
}

.footer-brand__note {
  margin-top: 1rem;
  max-width: 34ch;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist-300);
}

/* 页脚栏目 */
.footer-col {
  min-width: 0;
}

.footer-col__title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper-050);
}

.footer-col__title::before {
  content: "//";
  margin-right: 0.4rem;
  color: var(--lime-400);
}

.footer-list {
  display: grid;
  gap: 0.5rem;
}

.footer-list a {
  display: inline-block;
  font-size: 0.92rem;
  color: var(--mist-300);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-list a:hover {
  color: var(--lime-400);
  transform: translateX(3px);
}

/* 页脚联系摘要 */
.footer-contact {
  min-width: 0;
}

.footer-contact__list {
  display: grid;
  gap: 0.7rem;
}

.footer-contact__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.6rem;
  align-items: baseline;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.footer-contact__val {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--paper-050);
  overflow-wrap: anywhere;
}

.footer-contact__note {
  margin-top: 0.9rem;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--mist-300);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-500);
}

.footer-legal a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist-300);
  transition: color var(--dur) var(--ease);
}

.footer-legal a:hover {
  color: var(--lime-200);
}

/* 页脚底条 */
.footer-meta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem 1.5rem;
  width: var(--shell);
  margin: clamp(2rem, 4vw, 3rem) auto 0;
  padding-top: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist-300);
  border-top: 1px solid var(--line-500);
}

.footer-meta__copy,
.footer-meta__icp,
.footer-meta__note {
  max-width: none;
}

.footer-meta__icp {
  color: var(--paper-050);
}

.footer-meta__note {
  color: var(--edge-700);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1320px) {
  .site-nav {
    gap: 1rem;
  }

  .site-nav__link {
    padding: 0.5rem 0.6rem;
    font-size: 0.9rem;
  }

  .site-nav__link[aria-current="page"]::after {
    left: 0.6rem;
    right: 0.6rem;
  }
}

@media (max-width: 1180px) {
  .header-tick {
    display: none;
  }

  .site-nav__actions .btn--ghost {
    display: none;
  }
}

@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1024px) {
  :root {
    --header-h: 70px;
  }

  .header-inner {
    gap: 0.75rem;
  }

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

  .brand__mark {
    width: 38px;
    height: 38px;
    font-size: 0.85rem;
  }

  .site-nav {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: max(12px, env(safe-area-inset-bottom));
    z-index: 111;
    display: block;
    width: auto;
    max-height: calc(100vh - 96px);
    margin: 0;
    padding: 1.1rem;
    overflow-y: auto;
    background-color: var(--ink-950);
    border: 1px solid var(--edge-700);
    border-radius: 14px;
    box-shadow: 0 -20px 60px rgba(0, 0, 0, 0.65);
    transform: translateY(calc(100% + 32px));
    visibility: hidden;
    transition: transform 0.34s var(--ease), visibility 0.34s var(--ease);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.8rem 0.95rem;
    font-size: 1rem;
    color: var(--paper-050);
    border: 1px solid var(--line-500);
    border-radius: 8px;
  }

  .site-nav__link::before {
    content: "0" counter(nav);
    order: 2;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--mist-300);
  }

  .site-nav__link[aria-current="page"] {
    color: var(--lime-200);
    background-color: rgba(199, 255, 62, 0.1);
    border-color: var(--lime-400);
  }

  .site-nav__link[aria-current="page"]::after {
    display: none;
  }

  .site-nav__link[aria-current="page"]::before {
    color: var(--lime-400);
  }

  .site-nav__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
    margin-top: 0.9rem;
    padding: 1rem 0 0;
    border-left: 0;
    border-top: 1px solid var(--line-500);
  }

  .site-nav__actions .btn {
    width: 100%;
    min-height: 44px;
    font-size: 0.94rem;
  }

  .site-nav__actions .btn--ghost {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: calc(100% - 2rem);
  }

  body {
    font-size: 16px;
  }

  .brand__sub {
    letter-spacing: 0.16em;
  }

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

  .footer-brand {
    grid-column: auto;
  }

  .footer-meta {
    justify-content: flex-start;
    gap: 0.4rem 1rem;
  }
}

@media (max-width: 380px) {
  .brand__text {
    display: none;
  }
}

/* ---------- 无障碍：动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .site-nav,
  .nav-scrim {
    transition: none;
  }
}