/* ==========================================================================
   Clash Verge 官方网站 - 单栏阅读说明页风格样式表 (Single-Column Editorial & Long-Form Reading Theme)
   ========================================================================== */

:root {
  --bg-read: #0d1117;
  --bg-surface: #161b22;
  --bg-card: rgba(22, 27, 34, 0.85);
  --bg-card-hover: rgba(29, 36, 46, 0.95);
  --bg-header: rgba(13, 17, 23, 0.94);
  --accent-read: #58a6ff;
  --accent-cyan: #39c5cf;
  --accent-purple: #bc8cff;
  --accent-emerald: #3fb950;
  --border-read: #30363d;
  --border-subtle: rgba(240, 246, 252, 0.1);
  --border-focus: #58a6ff;
  --text-main: #f0f6fc;
  --text-body: #c9d1d9;
  --text-sub: #8b949e;
  --text-dim: #6e7681;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --max-w-read: 920px;
  --max-w-full: 1160px;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background-color: var(--bg-read);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-read);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(88, 166, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 40%, rgba(188, 140, 255, 0.06) 0%, transparent 40%);
  color: var(--text-body);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-w-read);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  width: 100%;
  max-width: var(--max-w-full);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 顶部公告条 */
.read-top-bar {
  background: #090d13;
  border-bottom: 1px solid var(--border-read);
  padding: 0.5rem 0;
  font-size: 0.82rem;
  color: var(--text-sub);
}

.read-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--accent-read);
}

.read-tag-pill {
  background: rgba(88, 166, 255, 0.15);
  border: 1px solid rgba(88, 166, 255, 0.35);
  color: var(--accent-read);
  font-size: 0.72rem;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-read);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.read-logo-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #1f6feb 0%, #58a6ff 100%);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-weight: 900;
  font-size: 1.05rem;
  box-shadow: 0 4px 14px rgba(31, 111, 235, 0.35);
}

.brand-logo .accent-read {
  background: linear-gradient(135deg, #58a6ff, #39c5cf);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-item {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-sub);
  padding: 0.35rem 0.2rem;
  position: relative;
}

.nav-item:hover,
.nav-item.active {
  color: var(--text-main);
}

.nav-item.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-read);
  border-radius: 2px;
}

.nav-btn-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-toggle {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  color: var(--text-main);
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.15rem;
}

/* 按钮设计 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.68rem 1.55rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #238636 0%, #2ea043 100%);
  color: #ffffff;
  box-shadow: 0 2px 12px rgba(35, 134, 54, 0.35);
  border: 1px solid rgba(240, 246, 252, 0.1);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2ea043 0%, #3fb950 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(35, 134, 54, 0.45);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-read);
}

.btn-secondary:hover {
  background: #21262d;
  border-color: var(--text-sub);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.42rem 0.95rem;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.85rem 2.15rem;
  font-size: 1.02rem;
  border-radius: var(--radius-md);
}

/* 单栏 Hero 首屏说明区 */
.read-hero-section {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border-read);
}

.read-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(88, 166, 255, 0.12);
  border: 1px solid rgba(88, 166, 255, 0.3);
  padding: 0.32rem 0.95rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-read);
  margin-bottom: 1.5rem;
}

.read-hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1.25rem;
}

.read-gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #58a6ff 60%, #39c5cf 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.read-hero-desc {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-body);
  max-width: 780px;
  margin: 0 auto 2rem;
}

.read-hero-desc strong {
  color: var(--text-main);
}

/* 软件窗口展示框架 */
.read-window-frame {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  margin: 2.5rem 0;
  text-align: left;
}

.read-frame-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: #090d13;
  border-bottom: 1px solid var(--border-read);
  font-size: 0.82rem;
  color: var(--text-sub);
}

.read-dots {
  display: flex;
  gap: 6px;
}

.read-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-read);
}

/* 数据背书区 (单栏精炼排版) */
.endorsement-section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border-read);
  background: rgba(22, 27, 34, 0.4);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: var(--transition);
}

.stat-box:hover {
  border-color: var(--accent-read);
  transform: translateY(-2px);
}

.stat-val {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent-read);
  margin-bottom: 0.2rem;
}

.stat-tit {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.stat-inf {
  font-size: 0.78rem;
  color: var(--text-sub);
}

/* 单栏文章段落规范 */
.read-article-section {
  padding: 4.5rem 0;
}

.article-header {
  margin-bottom: 2.5rem;
  text-align: left;
}

.article-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-read);
  background: rgba(88, 166, 255, 0.12);
  border: 1px solid rgba(88, 166, 255, 0.25);
  padding: 0.2rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 2.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.article-intro {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.75;
}

/* 功能卡片单栏/两栏优雅排列 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--accent-read);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.feature-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(88, 166, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-read);
  font-size: 1.35rem;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.feature-text {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
}

.feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 0.65rem;
}

.chip {
  font-size: 0.75rem;
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
  background: #21262d;
  color: var(--text-sub);
  border: 1px solid var(--border-read);
}

/* 文章中的图文并茂说明块 */
.editorial-callout {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin: 3rem 0;
}

.editorial-callout h3 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.editorial-callout p {
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  font-size: 0.98rem;
}

.read-checklist {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.read-check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.read-check-item svg {
  color: var(--accent-emerald);
  flex-shrink: 0;
  margin-top: 4px;
}

/* 多平台支持矩阵 (单栏下卡片平铺) */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.platform-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  transition: var(--transition);
}

.platform-card:hover {
  border-color: var(--accent-read);
  transform: translateY(-2px);
}

.platform-icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #21262d;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.platform-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.platform-meta {
  font-size: 0.78rem;
  color: var(--text-sub);
}

.platform-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 9999px;
  background: rgba(88, 166, 255, 0.15);
  color: var(--accent-read);
}

/* FAQ 常见问题网格 (单栏列表式) */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 2rem;
}

.faq-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  transition: var(--transition);
}

.faq-card:hover {
  border-color: var(--accent-read);
}

.faq-q {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-q .q-tag {
  color: var(--accent-read);
  font-weight: 800;
}

.faq-a {
  font-size: 0.94rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* 底部 CTA 横幅 */
.read-cta-banner {
  background: linear-gradient(180deg, var(--bg-surface) 0%, #090d13 100%);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  text-align: center;
  margin: 3.5rem 0;
}

.cta-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.85rem;
}

.cta-desc {
  font-size: 1.08rem;
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto 2rem;
}

/* 内页头部 */
.page-hero {
  padding: 4rem 0 3rem;
  text-align: center;
  background: #090d13;
  border-bottom: 1px solid var(--border-read);
}

.page-hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

.page-hero p {
  font-size: 1.1rem;
  color: var(--text-sub);
  max-width: 720px;
  margin: 0 auto 1.5rem;
}

/* 下载矩阵网格 */
.dl-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.dl-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.dl-card.featured {
  border-color: var(--accent-read);
  box-shadow: 0 0 24px rgba(88, 166, 255, 0.2);
}

.dl-hot-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--accent-read);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.18rem 0.55rem;
  border-radius: 9999px;
  text-transform: uppercase;
}

.dl-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1.25rem;
}

.dl-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(88, 166, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-read);
  font-size: 1.35rem;
}

.dl-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.dl-card-sub {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.dl-specs-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.dl-spec-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.85rem;
  background: #090d13;
  border: 1px solid var(--border-read);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.dl-spec-k {
  color: var(--text-sub);
}

.dl-spec-v {
  color: var(--text-main);
  font-weight: 600;
  font-family: var(--font-mono);
}

.dl-btn-group {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

/* 教程步骤卡片 */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  margin-top: 2rem;
}

.step-box {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--transition);
}

.step-box:hover {
  border-color: var(--accent-read);
}

.step-idx {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(88, 166, 255, 0.15);
  color: var(--accent-read);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  border: 1px solid rgba(88, 166, 255, 0.3);
}

.step-main h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.65rem;
}

.step-main p {
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.step-code-bar {
  background: #090d13;
  border: 1px solid var(--border-read);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-read);
  overflow-x: auto;
  margin-top: 0.75rem;
}

.step-pic-box {
  margin-top: 1.25rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-read);
}

/* 对比表格 */
.table-responsive-box {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-read);
  border-radius: var(--radius-md);
  margin-top: 2rem;
}

.client-compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.93rem;
}

.client-compare-table th,
.client-compare-table td {
  padding: 1rem 1.35rem;
  border-bottom: 1px solid var(--border-read);
}

.client-compare-table th {
  background: #090d13;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.client-compare-table tr:last-child td {
  border-bottom: none;
}

.client-compare-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.color-highlight { color: var(--accent-read); font-weight: 600; }
.color-dim { color: var(--text-dim); }

/* 页脚 */
.site-footer {
  margin-top: auto;
  background: #090d13;
  border-top: 1px solid var(--border-read);
  padding: 4rem 0 2rem;
  color: var(--text-sub);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-brand p {
  color: var(--text-dim);
  line-height: 1.6;
  font-size: 0.85rem;
}

.footer-col h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1.15rem;
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--text-sub);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-read);
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-read);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-chips {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* 响应式 */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .platforms-grid { grid-template-columns: repeat(3, 1fr); }
  .dl-matrix-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #0d1117;
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-read);
    gap: 1rem;
  }
  .nav-links.active { display: flex; }
  .read-hero-title { font-size: 2.25rem; }
  .features-grid { grid-template-columns: 1fr; }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .dl-matrix-grid { grid-template-columns: 1fr; }
  .step-box { grid-template-columns: 1fr; gap: 1rem; }
  .step-idx { width: 44px; height: 44px; font-size: 1.2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}