/* ============================================================
   Clash中文网 base.css
   「网络组件仪表盘」石墨工程风:全站直角、1px 细线分层、
   无投影 / 无渐变 / 无光晕;琥珀橙只用于主按钮、状态点、关键数据。
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --c-bg: #16181D;
  --c-panel: #1C2027;
  --c-panel-2: #232932;
  --c-line: #343C47;
  --c-line-soft: #2A303A;
  --c-accent: #E08A00;
  --c-accent-deep: #B56F00;
  --c-text: #E5E8EC;
  --c-mute: #96A0AC;
  --c-ok: #4CB782;
  --c-warn: #D9A62E;
  --c-err: #D95757;

  --f-display: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --f-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --f-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Courier New', monospace;

  --wrap: 1180px;
  --hdr-h: 60px;
  --ease: cubic-bezier(0.3, 0.6, 0.3, 1);
}

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

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

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
}

img,
svg {
  max-width: 100%;
  display: inline-block;
  vertical-align: middle;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--f-display);
  font-weight: 650;
  line-height: 1.3;
}

::selection {
  background: var(--c-accent);
  color: var(--c-bg);
}

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

/* ---------- 布局原语 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.sec {
  padding: 72px 0;
  border-bottom: 1px solid var(--c-line);
}

.sec-kicker {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-mute);
  margin-bottom: 12px;
}

.sec-kicker::before {
  content: "// ";
}

.sec-title {
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.01em;
}

.sec-desc {
  color: var(--c-mute);
  max-width: 56em;
  margin-top: 12px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.grid-2 > *,
.grid-3 > * {
  min-width: 0;
}

/* ---------- 面板 ---------- */
.panel {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
}

.panel-2 {
  background: var(--c-panel-2);
  border: 1px solid var(--c-line);
}

.panel-pad {
  padding: 22px 24px;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
  font-weight: 600;
}

/* ---------- 状态圆点(全站唯一允许圆角的元素) ---------- */
.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-mute);
  flex-shrink: 0;
}

.dot--ok { background: var(--c-ok); }
.dot--warn { background: var(--c-warn); }
.dot--err { background: var(--c-err); }
.dot--acc { background: var(--c-accent); }
.dot--idle { background: var(--c-line); }

.dot--pulse {
  animation: dotPulse 2.4s var(--ease) infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 550;
  border: 1px solid transparent;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
  white-space: nowrap;
}

.btn svg {
  flex-shrink: 0;
}

.btn-solid {
  background: var(--c-accent);
  color: var(--c-bg);
  border-color: var(--c-accent);
}

.btn-solid:hover {
  background: var(--c-accent-deep);
  border-color: var(--c-accent-deep);
}

.btn-line {
  border-color: var(--c-line);
  color: var(--c-text);
  background: transparent;
}

.btn-line:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 等宽工具类 ---------- */
.mono {
  font-family: var(--f-mono);
}

.accent-num {
  font-family: var(--f-mono);
  color: var(--c-accent);
}

/* ---------- 代码块 ---------- */
pre {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  padding: 14px 18px;
  overflow-x: auto;
  font-family: var(--f-mono);
  font-size: 13px;
  line-height: 1.7;
}

code {
  font-family: var(--f-mono);
  font-size: 0.92em;
}

p code,
li code {
  background: var(--c-panel-2);
  border: 1px solid var(--c-line-soft);
  padding: 1px 6px;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
}

/* ---------- 头部(header.js 注入) ---------- */
.site-hdr {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
}

.hdr-in {
  display: flex;
  align-items: stretch;
  height: var(--hdr-h);
  gap: 24px;
}

.hdr-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-display);
  font-weight: 650;
  font-size: 16px;
  flex-shrink: 0;
}

.hdr-brand img {
  flex-shrink: 0;
  display: block;
}

.hdr-nav {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.hdr-nav a {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 13px;
  font-size: 14px;
  color: var(--c-mute);
  transition: color 0.18s var(--ease);
}

.hdr-nav a:hover {
  color: var(--c-text);
}

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

.hdr-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 2px;
  background: var(--c-accent);
}

.hdr-tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* 语言切换 */
.lang {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--c-line);
  font-size: 13px;
  color: var(--c-mute);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.lang-btn svg {
  flex-shrink: 0;
}

.lang-btn:hover {
  color: var(--c-text);
  border-color: var(--c-mute);
}

.lang-menu {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 150px;
  background: var(--c-panel-2);
  border: 1px solid var(--c-line);
  z-index: 60;
}

.lang.open .lang-menu {
  display: block;
}

.lang-menu li + li {
  border-top: 1px solid var(--c-line-soft);
}

.lang-menu a {
  display: block;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--c-mute);
  transition: color 0.15s var(--ease), background 0.15s var(--ease);
}

.lang-menu a:hover {
  color: var(--c-text);
  background: var(--c-panel);
}

.lang-menu a.is-cur {
  color: var(--c-accent);
}

/* 汉堡按钮(仅窄屏) */
.hdr-burger {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-line);
  color: var(--c-mute);
}

.hdr-burger:hover {
  color: var(--c-text);
  border-color: var(--c-mute);
}

.hdr-burger svg {
  flex-shrink: 0;
}

/* ---------- 页脚(footer.js 注入) ---------- */
.site-ftr {
  background: var(--c-panel);
  border-top: 1px solid var(--c-line);
}

.ftr-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.1fr 0.9fr;
  gap: 40px;
  padding: 56px 0 44px;
}

.ftr-grid > * {
  min-width: 0;
}

.ftr-brand a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: 16px;
}

.ftr-brand img {
  flex-shrink: 0;
}

.ftr-brand p {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-mute);
  max-width: 26em;
}

.ftr-col h3 {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-mute);
  margin-bottom: 16px;
}

.ftr-col li {
  margin-bottom: 9px;
}

.ftr-col a {
  font-size: 13px;
  color: var(--c-mute);
  transition: color 0.15s var(--ease);
}

.ftr-col a:hover {
  color: var(--c-text);
}

.ftr-base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--c-line);
  padding: 18px 0;
  font-size: 12px;
  color: var(--c-mute);
}

.ftr-host {
  font-family: var(--f-mono);
  letter-spacing: 0.06em;
}

/* ---------- Hero ---------- */
.hero {
  padding: 84px 0 76px;
  border-bottom: 1px solid var(--c-line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--c-line);
  padding: 6px 13px;
  font-size: 12px;
  color: var(--c-mute);
  letter-spacing: 0.04em;
}

.hero h1 {
  font-size: clamp(30px, 4.2vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  margin: 20px 0 24px;
}

.hero .btn-row {
  margin-bottom: 24px;
}

.hero-desc {
  color: var(--c-mute);
  font-size: 15.5px;
  max-width: 34em;
}

.hero-desc strong {
  color: var(--c-text);
  font-weight: 600;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.hero-tags li {
  border: 1px solid var(--c-line);
  padding: 4px 11px;
  font-size: 12px;
  color: var(--c-mute);
}

/* ---------- Hero 右侧:低调的服务器节点网格(纯 CSS) ----------
   刻意做得内敛:细线格 + 暗色小节点,仅少数节点用状态色,
   不与左侧标题/按钮争夺视觉焦点。 */
.hero-visual {
  min-width: 0;
}

.nodegrid {
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

.nodegrid-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-line);
}

.ng-cap {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.nodegrid-head .ng-cap:last-child {
  margin-left: auto;
}

.ng-field {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
}

.ng-cell {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--c-line-soft);
  border-bottom: 1px solid var(--c-line-soft);
}

.ng-cell:nth-child(9n) {
  border-right: 0;
}

.ng-cell:nth-last-child(-n+9) {
  border-bottom: 0;
}

.ng-cell::before {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--c-line);
  flex-shrink: 0;
}

.ng-cell.is-node::before {
  width: 4px;
  height: 4px;
  background: var(--c-mute);
  opacity: 0.65;
}

.ng-cell.is-ok::before {
  width: 5px;
  height: 5px;
  background: var(--c-ok);
  opacity: 0.85;
}

.ng-cell.is-live::before {
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  animation: ngBreath 3.4s var(--ease) infinite;
}

@keyframes ngBreath {
  0%, 100% { opacity: 0.95; }
  50% { opacity: 0.3; }
}

.nodegrid-foot {
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--c-line);
}

.nodegrid-foot span {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-mute);
  padding: 9px 14px;
  border-right: 1px solid var(--c-line-soft);
}

.nodegrid-foot span:last-child {
  border-right: 0;
}

/* ---------- 正文排版作用域(教程/文章页) ---------- */
.article {
  max-width: 780px;
}

.article h2 {
  font-size: 24px;
  margin: 44px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.article h3 {
  font-size: 18px;
  margin: 30px 0 12px;
}

.article p {
  margin: 0 0 16px;
  color: var(--c-text);
}

.article ul {
  list-style: none;
  margin: 0 0 18px;
}

.article ul > li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 9px;
  color: var(--c-text);
}

.article ul > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background: var(--c-accent);
}

.article ol {
  list-style: none;
  counter-reset: astep;
  margin: 0 0 18px;
}

.article ol > li {
  counter-increment: astep;
  position: relative;
  padding-left: 46px;
  margin-bottom: 12px;
}

.article ol > li::before {
  content: counter(astep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--c-accent);
  border: 1px solid var(--c-line);
  padding: 1px 7px;
}

.article pre {
  margin: 0 0 18px;
}

.article blockquote {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 2px solid var(--c-accent);
  padding: 14px 18px;
  color: var(--c-mute);
  margin: 0 0 18px;
}

/* ---------- 滚动淡入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hdr-nav {
    display: none;
  }

  .hdr-burger {
    display: flex;
  }

  .site-hdr.nav-open .hdr-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: var(--hdr-h);
    left: 0;
    right: 0;
    background: var(--c-panel);
    border-bottom: 1px solid var(--c-line);
    padding: 6px 0;
    gap: 0;
  }

  .site-hdr.nav-open .hdr-nav a {
    padding: 13px 24px;
  }

  .site-hdr.nav-open .hdr-nav a[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    max-width: 460px;
  }

  .ftr-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 620px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .sec {
    padding: 52px 0;
  }

  .hero {
    padding: 56px 0 52px;
  }

  .ftr-grid {
    grid-template-columns: 1fr;
    padding: 44px 0 32px;
  }
}

@media (min-width: 621px) and (max-width: 860px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .hero-visual {
    display: none;
  }

  .wrap {
    padding: 0 18px;
  }

  .btn {
    padding: 11px 18px;
    font-size: 14px;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .dot--pulse,
  .ng-cell.is-live::before {
    animation: none;
  }
}
@media (max-width: 960px) {
  html.nav-lock { overflow: hidden; }
  .site-hdr.nav-open .hdr-nav {
    max-height: calc(100vh - 64px);
    max-height: calc(100dvh - 64px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
}