/* ============================================================
   CLV3000 官网 · DeepSeek Harness 风格
   设计 token 取自应用内 src/theme.rs（保持品牌一致）
   ============================================================ */

:root {
  /* 品牌色（对应 theme.rs::colors） */
  --bg: #0a0d12;            /* BG_APP */
  --bg-deep: #06080b;       /* BG_SIDEBAR */
  --card: #12161d;          /* BG_CARD */
  --card-hover: #161b24;
  --border: #222832;        /* BORDER */
  --border-soft: rgba(255, 255, 255, 0.06);
  --accent: #3aa0e0;        /* ACCENT_BLUE */
  --accent-bg: #113247;     /* ACCENT_BLUE_BG */
  --green: #22c55e;
  --red: #ef4444;
  --text: #f5f7fa;          /* TEXT_PRIMARY */
  --text-2: #8a93a3;        /* TEXT_SECONDARY */
  --text-3: #5c6472;        /* TEXT_MUTED */

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", Consolas,
    "Liberation Mono", Menlo, monospace;

  /* 圆角 / 间距 */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --container: 1160px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- 背景层：矩阵雨 + 点阵网格 + CRT 扫描线 ---------- */
.bg-matrix {
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: 0.4;
  pointer-events: none;
}
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}
.crt-overlay {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.018) 0px,
    rgba(255, 255, 255, 0.018) 1px,
    transparent 1px,
    transparent 3px
  );
}
.crt-overlay::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: -20%;
  height: 130px;
  background: linear-gradient(to bottom, transparent, rgba(58, 160, 224, 0.05), transparent);
  animation: crtSweep 8s linear infinite;
}
@keyframes crtSweep { to { top: 120%; } }

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

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-soft);
  padding: 1px 6px;
  border-radius: 6px;
  color: #bcd6e8;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}
.nav.scrolled {
  background: rgba(10, 13, 18, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border-soft);
}
.nav-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand-logo {
  width: 30px;
  height: 30px;
  object-fit: contain;
  flex-shrink: 0;
}
.brand-name {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.brand-tag {
  font-size: 12px;
  color: var(--text-2);
  font-family: var(--font-mono);
  letter-spacing: 0.3px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 10px;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav-links a {
  font-size: 14.5px;
  color: var(--text-2);
  transition: color 0.2s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); }
.nav-links .nav-gh { color: var(--accent); }
.nav-links .nav-gh:hover { color: #6fc0f0; }
.nav-actions { display: flex; align-items: center; gap: 14px; }

/* 汉堡菜单（移动端） */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  padding: 0 9px;
}
.nav-burger span {
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 12px 22px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.25s ease,
    background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary {
  background: var(--accent);
  color: #04121d;
  box-shadow: 0 6px 24px -12px rgba(58, 160, 224, 0.6);
}
.btn-primary:hover {
  background: #52b0ec;
  color: #04121d;
  box-shadow: 0 8px 28px -12px rgba(58, 160, 224, 0.75);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: #3a4758;
  background: rgba(255, 255, 255, 0.04);
}
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* 语言切换 */
.btn-lang {
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.btn-lang:hover {
  color: var(--text);
  border-color: #3a4758;
  background: rgba(255, 255, 255, 0.04);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  padding: 168px 0 40px;
  text-align: center;
  overflow: hidden;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-2);
  letter-spacing: 0.4px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  padding: 7px 16px;
  margin-bottom: 28px;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  display: inline-block;
}
.dot-blue {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(58, 160, 224, 0.8);
}

/* 终端闪烁光标 */
.tk-cursor {
  display: inline-block;
  width: 7px;
  height: 13px;
  background: var(--accent);
  vertical-align: -2px;
  animation: cursorBlink 1.1s steps(2, start) infinite;
}
@keyframes cursorBlink { to { visibility: hidden; } }

.hero-title {
  font-size: clamp(38px, 6.4vw, 68px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -1.5px;
  margin-bottom: 22px;
}
.accent-text {
  color: var(--accent);
}
.hero-sub {
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--text-2);
  max-width: 720px;
  margin: 0 auto 36px;
}
.hero-sub code { background: rgba(255, 255, 255, 0.05); }

/* 截图双列 */
.hero-shots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 960px;
  margin: 0 auto 36px;
}
.shot {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.25s ease;
}
.shot:hover { border-color: #2c3a4e; }
.shot-media {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-soft);
}
.shot-media img {
  width: 100%;
  height: auto;
  display: block;
}
/* 截图上的扫描光带 */
.scanbar {
  position: absolute;
  left: 0; right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  box-shadow: 0 0 10px rgba(58, 160, 224, 0.55);
  opacity: 0;
  pointer-events: none;
  animation: scanSweep 4.2s ease-in-out infinite;
}
@keyframes scanSweep {
  0%   { top: -3%; opacity: 0; }
  10%  { opacity: 0.9; }
  50%  { top: 100%; opacity: 0.9; }
  60%  { opacity: 0; }
  100% { top: 101%; opacity: 0; }
}
.shot figcaption {
  font-size: 12.5px;
  color: var(--text-3);
  padding: 10px 16px;
  text-align: center;
  font-family: var(--font-mono);
  letter-spacing: 0.3px;
}

/* CTA + 数据 */
.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-stats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 72px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 140px;
  padding: 16px 22px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: rgba(18, 22, 29, 0.6);
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.stat-label {
  font-size: 12.5px;
  color: var(--text-3);
}
.os-support {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: -44px 0 0;
}
.os-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(18, 22, 29, 0.6);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
}
.os-chip svg {
  width: 17px;
  height: 17px;
  flex: none;
  color: var(--accent);
}

/* ============================================================
   通用 section
   ============================================================ */
.section {
  padding: 96px 0;
  scroll-margin-top: 80px;
}
.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  text-align: center;
  margin-bottom: 14px;
}
/* 代码注释式前缀 */
.section-eyebrow::before {
  content: "// ";
  color: var(--text-3);
  font-weight: 400;
}
.section-title {
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.8px;
  text-align: center;
  margin-bottom: 16px;
  line-height: 1.2;
}
.section-desc {
  text-align: center;
  color: var(--text-2);
  max-width: 680px;
  margin: 0 auto 56px;
  font-size: 16.5px;
}

/* ============================================================
   卡片
   ============================================================ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 28px;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.card:hover {
  border-color: #2c3a4e;
  background: var(--card-hover);
  transform: translateY(-2px);
}
.card-icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--i, var(--accent));
  background: color-mix(in srgb, var(--i, var(--accent)) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--i, var(--accent)) 28%, transparent);
}
.card-icon svg { width: 22px; height: 22px; }
.card-header {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 13px;
}
.card-header h3 { margin-bottom: 0; }
.card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}
.card p {
  color: var(--text-2);
  font-size: 14.5px;
}
.card p strong { color: var(--text); font-weight: 600; }

/* ============================================================
   功能网格
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ============================================================
   扫描模式
   ============================================================ */
.mode-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
}
.mode {
  display: grid;
  grid-template-columns: 200px 1fr 2.2fr;
  align-items: center;
  gap: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 24px 28px;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.mode:hover { border-color: #2c3a4e; background: var(--card-hover); }
.mode h3 { font-size: 18px; font-weight: 700; }
.mode p { color: var(--text-2); font-size: 14.5px; }

.mode-tag {
  justify-self: start;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.4px;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid;
}
.mode-tag-blue { color: #7cc4ef; border-color: rgba(58, 160, 224, 0.4); background: rgba(58, 160, 224, 0.1); }
.mode-tag-green { color: #5fd68a; border-color: rgba(34, 197, 94, 0.4); background: rgba(34, 197, 94, 0.1); }
.mode-tag-gray { color: var(--text-2); border-color: var(--border); background: rgba(255, 255, 255, 0.04); }

/* ============================================================
   应用场景
   ============================================================ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.scenario {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.scenario:hover { border-color: #2c3a4e; transform: translateY(-2px); }
.scenario-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--border-soft);
  background:
    linear-gradient(135deg, #10151d, #0a0d12);
}
.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease, opacity 0.4s ease;
  opacity: 0.85;
}
.scenario:hover .scenario-media img { transform: scale(1.02); opacity: 1; }
.scenario-body { padding: 24px 26px 26px; }
.scenario-body .mode-tag { margin-bottom: 12px; }
.scenario-body h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.scenario-body p { color: var(--text-2); font-size: 14.5px; }

/* ============================================================
   快速上手
   ============================================================ */
.quick-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.quick-step { position: relative; padding: 30px; }
.step-num {
  position: absolute;
  top: 22px; right: 26px;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.07);
}
.quick-step h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.quick-step p { color: var(--text-2); font-size: 14.5px; }
.quick-step p a { color: var(--accent); }
.mini-term {
  margin-top: 16px;
  background: #0d1117;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-sm);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.8;
  overflow-x: auto;
  white-space: nowrap;
}
.mini-term p { color: var(--text); }

.final-cta {
  text-align: center;
  margin-top: 72px;
  padding: 48px 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: radial-gradient(ellipse 80% 90% at 50% 0%, rgba(58, 160, 224, 0.08), transparent 70%), var(--card);
}
.final-ghost {
  font-size: 17px;
  color: var(--text-2);
  max-width: 560px;
  margin: 0 auto 28px;
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: 56px 0 48px;
  background: var(--bg-deep);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.footer-tag { color: var(--text-3); font-size: 14px; }
.footer-links {
  display: flex;
  gap: 26px;
  font-size: 14px;
}
.footer-links a { color: var(--text-2); }
.footer-links a:hover { color: var(--accent); }
.footer-meta {
  margin-top: 8px;
  color: var(--text-3);
  font-size: 13px;
}

/* ============================================================
   滚动入场动画
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 960px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .mode {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .mode-tag { justify-self: start; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10, 13, 18, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 18px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .nav-links.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--border-soft); font-size: 15.5px; }
  .nav-burger { display: flex; }

  .hero { padding-top: 130px; }
  .hero-stats { margin-bottom: 52px; }
  .hero-shots { grid-template-columns: 1fr; }
  .stat { min-width: 120px; padding: 12px 16px; }

  .section { padding: 72px 0; }
  .section-desc { margin-bottom: 40px; }

  .scenario-grid,
  .quick-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 10px; }
  .stat { width: calc(50% - 5px); min-width: 0; }
  .hero-cta .btn { width: 100%; }
}

/* ============================================================
   无障碍：减弱动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .dot { animation: none; }
  .hero::before,
  .hero-title,
  .crt-overlay::before,
  .scanbar,
  .tk-cursor { animation: none; }
  .scanbar { opacity: 0; }
}