/* ==========================================================================
   CommandCenter — 暗黑指挥中心 · 紧凑密度
   全局样式表（Inter + JetBrains Mono）
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* 三层暗色表面系统 */
  --bg: #0d1117;
  --surface-1: #161b22;
  --surface-2: #1c2128;
  --surface-hover: #262d38;

  /* 边框 */
  --border: #21262d;
  --border-2: #30363d;

  /* 文字 */
  --text: #e6edf3;
  --text-secondary: #8b949e;
  --text-tertiary: #484f58;
  --text-body: #c9d1d9;

  /* 唯一荧光强调色 */
  --accent: #00e5a0;
  --accent-contrast: #0d1117;
  --accent-rgb: 0, 229, 160;

  /* 问题红色 */
  --danger: #f85149;

  /* 字体 */
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* 圆角 */
  --radius: 6px;
  --radius-sm: 4px;

  /* 布局 */
  --container: 1200px;
  --container-wide: 1400px;
  --nav-h: 56px;
}

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

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 150ms ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }

/* 焦点环 */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.3);
  border-radius: var(--radius-sm);
}

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

.section {
  padding: 80px 0;
}

.section-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  text-align: center;
}

.section-subtitle {
  font-size: 16px;
  font-weight: 400;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 12px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------------------------- 按钮 ---------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transition: filter 150ms ease-out, border-color 150ms ease, background 150ms ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn--primary:hover { filter: brightness(1.1); }
.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-2);
  font-weight: 500;
}
.btn--ghost:hover {
  border-color: var(--text-secondary);
  background: rgba(230, 237, 243, 0.05);
}
.btn--lg {
  padding: 18px 40px;
  font-size: 18px;
  font-weight: 600;
}
.btn--sm {
  padding: 9px 16px;
  font-size: 13px;
}
.btn--block { width: 100%; }

/* ---------------------------- 导航栏 ---------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav__logo {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav__logo .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.6);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}
.nav__link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  border-radius: var(--radius);
  position: relative;
}
.nav__link:hover { color: var(--text); }
.nav__link.active {
  color: var(--text);
}
.nav__link.active::after {
  content: '';
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}
.nav__cta {
  margin-left: auto;
}
.nav__toggle {
  display: none;
  width: 36px; height: 36px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-left: auto;
}
.nav__toggle span {
  display: block;
  width: 16px; height: 1.5px;
  background: var(--text);
  transition: transform 200ms ease, opacity 200ms ease;
}
.nav__toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* 移动端导航面板 */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px;
  flex-direction: column;
  gap: 4px;
  z-index: 999;
}
.nav__mobile.open { display: flex; }
.nav__mobile a {
  padding: 12px 8px;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.nav__mobile a:last-of-type { border-bottom: none; }
.nav__mobile a:hover, .nav__mobile a.active { color: var(--text); }
.nav__mobile .btn { margin-top: 12px; }

/* ---------------------------- Hero ---------------------------- */
.hero {
  background: var(--bg);
  padding: calc(var(--nav-h) + 64px) 0 64px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 120px;
  background: linear-gradient(to bottom, var(--bg), var(--surface-1));
  pointer-events: none;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero__label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.hero__title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}
.hero__subtitle {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-top: 20px;
  max-width: 520px;
}
.hero__actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.hero__proof {
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero__proof .avatars {
  display: flex;
}
.hero__proof .avatars span {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  margin-left: -8px;
  background: var(--surface-2);
}
.hero__proof .avatars span:first-child { margin-left: 0; }

/* 产品 UI 面板 */
.ui-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  animation: panelIn 600ms ease-out both;
}
@keyframes panelIn {
  from { opacity: 0; transform: translateX(10px); }
  to { opacity: 1; transform: translateX(0); }
}
.ui-panel__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
}
.ui-panel__bar .dots { display: flex; gap: 6px; }
.ui-panel__bar .dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--text-tertiary);
}
.ui-panel__bar .url {
  margin-left: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-tertiary);
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
}
.ui-panel__body { padding: 16px; }
.ui-panel__title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.ui-panel__title .live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
}
.ui-panel__title .live::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* 工单行 */
.ticket-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  background: var(--surface-1);
  border: 1px solid transparent;
}
.ticket-row:hover { border-color: var(--border); }
.ticket-row .status {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}
.status--open { background: rgba(var(--accent-rgb), 0.12); color: var(--accent); }
.status--critical { background: rgba(248, 81, 73, 0.12); color: var(--danger); }
.status--progress { background: rgba(88, 166, 255, 0.12); color: #58a6ff; }
.ticket-row .title {
  flex: 1;
  font-size: 13px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ticket-row .time {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* 看板列 */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.board__col { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px; }
.board__col-head { font-size: 12px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.board__item {
  font-size: 12px;
  color: var(--text-body);
  padding: 5px 6px;
  border-radius: 3px;
  background: var(--bg);
  margin-bottom: 4px;
}
.board__item .tag { font-size: 10px; color: var(--accent); }

/* 活动流 */
.activity { margin-top: 12px; }
.activity__item {
  position: relative;
  padding-left: 18px;
  padding-bottom: 10px;
  font-size: 12px;
  color: var(--text-body);
}
.activity__item::before {
  content: '';
  position: absolute;
  left: 5px; top: 4px; bottom: -2px;
  width: 1px;
  background: var(--border);
}
.activity__item::after {
  content: '';
  position: absolute;
  left: 3px; top: 4px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.activity__item:last-child::before { display: none; }
.activity__item .t {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-tertiary);
  margin-left: 6px;
}

/* ---------------------------- 痛点区 ---------------------------- */
.pain { background: var(--surface-1); }
.pain__list {
  margin-top: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.pain__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 14px 18px;
  position: relative;
  border-bottom: 1px solid var(--border);
}
.pain__row:last-child { border-bottom: none; }
.pain__row:nth-child(odd) { background: var(--surface-1); }
.pain__row:nth-child(even) { background: var(--surface-2); }
.pain__row::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--danger);
}
.pain__issue { display: flex; align-items: flex-start; gap: 10px; }
.pain__issue .icon { color: var(--danger); flex-shrink: 0; font-size: 16px; line-height: 1.4; }
.pain__issue .text { font-size: 16px; color: var(--text-secondary); font-weight: 400; }
.pain__result {
  font-size: 14px;
  color: var(--text-tertiary);
  align-self: center;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}
.pain__transition {
  text-align: center;
  font-size: 18px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 40px;
}

/* ---------------------------- 能力对照表 ---------------------------- */
.capability { background: var(--bg); }
.comparison {
  margin-top: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.comparison__row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
}
.comparison__row:last-child { border-bottom: none; }
.comparison__pain,
.comparison__ability {
  padding: 16px 20px;
  position: relative;
}
.comparison__pain {
  font-size: 15px;
  color: var(--text-secondary);
  background: transparent;
}
.comparison__pain::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--danger);
}
.comparison__ability {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  background: var(--surface-2);
  transition: background 200ms ease;
}
.comparison__ability::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
  transition: width 200ms ease;
}
.comparison__row:hover .comparison__ability { background: var(--surface-hover); }
.comparison__row:hover .comparison__ability::before { width: 4px; }
.comparison__arrow {
  align-self: center;
  color: var(--accent);
  font-size: 16px;
  font-weight: 600;
}

/* ---------------------------- 时间线 ---------------------------- */
.timeline { background: var(--surface-1); }
.timeline__grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.step {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms ease, transform 500ms ease;
}
.step.visible { opacity: 1; transform: translateY(0); }
.step__num {
  position: absolute;
  top: 8px; right: 16px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 48px;
  line-height: 1;
  color: var(--accent);
  opacity: 0.15;
}
.step__title { font-size: 20px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.step__desc { font-size: 14px; color: var(--text-secondary); line-height: 1.5; }

/* ---------------------------- 社会证明 ---------------------------- */
.social { background: var(--bg); }
.testimonials {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.quote {
  background: var(--surface-1);
  border-left: 2px solid var(--border-2);
  border-radius: var(--radius);
  padding: 20px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms ease, transform 500ms ease;
}
.quote.visible { opacity: 1; transform: translateY(0); }
.quote__text {
  font-size: 16px;
  font-style: italic;
  color: var(--text-body);
  line-height: 1.55;
}
.quote__author {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.quote__avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--surface-2);
  filter: grayscale(100%);
  flex-shrink: 0;
}
.quote__meta { font-size: 13px; color: var(--text-secondary); }
.quote__meta strong { display: block; color: var(--text); font-weight: 500; font-size: 13px; }

.metrics {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  background: var(--surface-1);
}
.metric { text-align: center; }
.metric__num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--accent);
}
.metric__label { font-size: 14px; color: var(--text-secondary); margin-top: 8px; }

.logos {
  margin-top: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.logos span {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  opacity: 0.6;
  filter: grayscale(100%) brightness(0.7);
  letter-spacing: 0.02em;
}

/* ---------------------------- 定价 ---------------------------- */
.pricing { background: var(--surface-1); }
.pricing-table-wrap {
  margin-top: 48px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.pricing-table {
  width: 100%;
  min-width: 720px;
  border-collapse: separate;
  border-spacing: 0;
}
.pricing-table th, .pricing-table td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.pricing-table thead th {
  background: var(--surface-2);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}
.pricing-table thead th:first-child { text-align: left; }
.pricing-table tbody th { text-align: left; font-weight: 400; font-size: 14px; color: var(--text-secondary); }
.pricing-table tbody tr:nth-child(odd) { background: var(--surface-1); }
.pricing-table tbody tr:nth-child(even) { background: var(--bg); }
.pricing-table .price-cell { font-family: var(--mono); font-weight: 700; font-size: 18px; color: var(--text); }
.pricing-table .price-cell small { display: block; font-family: var(--sans); font-weight: 400; font-size: 12px; color: var(--text-secondary); }
.pricing-table .featured-col {
  border-left: 1px solid var(--accent);
  border-right: 1px solid var(--accent);
  background: rgba(var(--accent-rgb), 0.03);
}
.check { color: var(--accent); font-weight: 700; }
.cross { color: var(--text-tertiary); }
.pricing-table .badge-pop {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  color: var(--accent-contrast);
  background: var(--accent);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
}

.plans {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.plan {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: border-color 200ms ease;
}
.plan:hover { border-color: var(--accent); }
.plan--featured { border-color: var(--accent); }
.plan__badge {
  position: absolute;
  top: -11px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--accent-contrast);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.plan__name { font-size: 20px; font-weight: 600; color: var(--text); }
.plan__price {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 36px;
  color: var(--text);
  margin: 16px 0 4px;
}
.plan__price span { font-family: var(--sans); font-weight: 400; font-size: 14px; color: var(--text-secondary); }
.plan__desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; }
.plan__features { margin-bottom: 28px; flex: 1; }
.plan__features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text-body);
  padding: 5px 0;
}
.plan__features li::before {
  content: '✓';
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ---------------------------- FAQ ---------------------------- */
.faq { background: var(--bg); }
.faq__wrap {
  max-width: 800px;
  margin: 48px auto 0;
}
.faq__item {
  border-bottom: 1px solid var(--border);
}
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.faq__q .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.faq__q .q-text { flex: 1; }
.faq__q .icon {
  color: var(--accent);
  font-size: 18px;
  line-height: 1;
  transition: transform 300ms ease;
  flex-shrink: 0;
}
.faq__item.open .faq__q .icon { transform: rotate(180deg); }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease-in-out;
}
.faq__a-inner {
  background: var(--surface-2);
  border-radius: var(--radius);
  margin: 0 20px 16px;
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}
.faq__transition {
  text-align: center;
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 32px;
}

/* ---------------------------- 最终 CTA ---------------------------- */
.final-cta {
  background: var(--surface-1);
  position: relative;
  overflow: hidden;
  padding: 100px 0;
  text-align: center;
}
.final-cta::before {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.07), transparent 60%);
  pointer-events: none;
}
.final-cta__title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text);
}
.final-cta__subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-top: 16px;
}
.final-cta__actions { margin-top: 32px; }
.final-cta__note {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 16px;
}

/* ---------------------------- 页脚 ---------------------------- */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer__brand .nav__logo { margin-bottom: 12px; }
.footer__brand p { font-size: 13px; color: var(--text-tertiary); line-height: 1.6; }
.footer h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 14px; color: var(--text-tertiary); }
.footer ul li a:hover { color: var(--text-secondary); }
.footer__bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer__bottom p { font-size: 13px; color: var(--text-tertiary); }
.footer__beian {
  font-size: 13px;
  color: var(--text-tertiary);
}
.footer__beian:hover { color: var(--text-secondary); }

/* ---------------------------- 子页面 Hero ---------------------------- */
.page-hero {
  background: var(--bg);
  padding: calc(var(--nav-h) + 64px) 0 48px;
  border-bottom: 1px solid var(--border);
}
.page-hero__title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}
.page-hero__desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-top: 14px;
  max-width: 640px;
  line-height: 1.55;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}
.breadcrumb a:hover { color: var(--text-secondary); }
.breadcrumb .sep { color: var(--text-tertiary); }
.breadcrumb .current { color: var(--text-secondary); }

/* ---------------------------- 列表页卡片 ---------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 200ms ease, background 200ms ease;
}
.card:hover { border-color: var(--accent); }
.card__tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  align-self: flex-start;
}
.card__title { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 10px; }
.card__title a:hover { color: var(--accent); }
.card__desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; flex: 1; }
.card__meta {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-tertiary);
  font-family: var(--mono);
}
.card__link {
  margin-top: 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.card__link:hover { text-decoration: underline; }

/* ---------------------------- 详情页 ---------------------------- */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}
.prose { font-size: 16px; line-height: 1.75; color: var(--text-body); }
.prose h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin: 36px 0 14px;
  letter-spacing: -0.01em;
}
.prose h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 12px;
}
.prose p { margin-bottom: 16px; }
.prose ul { margin: 12px 0 20px; padding-left: 4px; }
.prose ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
}
.prose ul li::before {
  content: '';
  position: absolute;
  left: 4px; top: 11px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.prose blockquote {
  border-left: 2px solid var(--accent);
  background: var(--surface-1);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 20px 0;
  color: var(--text-secondary);
  font-style: italic;
}
.prose code {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  color: var(--accent);
}
.prose pre {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  margin: 16px 0;
}
.prose pre code {
  background: none;
  border: none;
  color: var(--text-body);
  font-size: 13px;
  line-height: 1.6;
  padding: 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.prose th, .prose td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.prose th { background: var(--surface-2); color: var(--text); font-weight: 600; }
.prose td { color: var(--text-secondary); }

.aside-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
}
.aside-card h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.aside-card ul li { margin-bottom: 10px; }
.aside-card ul li a { font-size: 14px; color: var(--text-secondary); }
.aside-card ul li a:hover { color: var(--accent); }

.meta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 16px;
  flex-wrap: wrap;
}
.meta-row .chip {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

/* 案例指标 */
.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}
.case-stat {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.case-stat__num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 30px;
  color: var(--accent);
}
.case-stat__label { font-size: 13px; color: var(--text-secondary); margin-top: 6px; }

/* ---------------------------- 表单 ---------------------------- */
.form-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 7px;
}
.form-group label .req { color: var(--danger); }
.form-control {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  font-size: 14px;
  color: var(--text);
  transition: border-color 150ms ease;
}
.form-control::placeholder { color: var(--text-tertiary); }
.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.3);
}
textarea.form-control { min-height: 120px; resize: vertical; }
.form-error {
  display: none;
  font-size: 12px;
  color: var(--danger);
  margin-top: 6px;
}
.form-group.invalid .form-control { border-color: var(--danger); }
.form-group.invalid .form-error { display: block; }
.form-hint { font-size: 12px; color: var(--text-tertiary); margin-top: 6px; }
.form-success {
  display: none;
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 14px;
  margin-bottom: 18px;
}
.form-success.show { display: block; }

.checkbox-row { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--text-secondary); }
.checkbox-row input { margin-top: 3px; accent-color: var(--accent); }

/* ---------------------------- 响应式 ---------------------------- */
@media (max-width: 992px) {
  .hero__grid { grid-template-columns: 1fr; gap: 36px; }
  .hero__title { font-size: 38px; }
  .timeline__grid, .testimonials, .plans, .card-grid { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .aside-card { position: static; }
  .case-stats { grid-template-columns: 1fr; }
  .pain__row { grid-template-columns: 1fr; gap: 10px; }
  .pain__result { border-left: none; padding-left: 26px; }
  .comparison__row { grid-template-columns: 1fr; }
  .comparison__arrow { transform: rotate(90deg); justify-self: center; padding: 0; }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }
  .section-title { font-size: 30px; }
  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero__title { font-size: 32px; }
  .final-cta__title { font-size: 32px; }
  .page-hero__title { font-size: 30px; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .logos { gap: 24px; }
  .form-card { padding: 24px; }
}