/* ==========================================================================
   DeepSeek Feature Comparison Table Theme (比较表)
   Layout: First column is Feature Name, following columns are Products (DeepSeek AI, Harness, 网页版).
   Details: Uses Checkmark (✔) and Cross (✕). Sticky table header (top: 64px or sticky inside table wrap).
   Row hover color transformation. High precision tabular typography.
   Columns: Feature, DeepSeek AI, Harness, 网页版.
   ========================================================================== */

:root {
  --table-bg: #080c16;
  --table-surface: #0f1626;
  --table-surface-card: #151e33;
  --table-border: #1e2c48;
  --table-header-bg: #121b2f;
  --table-row-hover: #1b2640;
  --table-accent: #38bdf8;
  --table-accent-hover: #0284c7;
  --check-color: #10b981;
  --cross-color: #64748b;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--table-bg);
  color: var(--text-main);
  font-family: var(--font-sans);
}

body {
  min-height: 100vh;
  background-color: var(--table-bg);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.12), transparent 60%),
    linear-gradient(to bottom, rgba(8, 12, 22, 0.96), #080c16);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   比较表组件 (Comparison Table Shelf)
   第一列：功能名；后续列：DeepSeek AI、Harness、网页版
   表头粘住 (position: sticky)，行悬停变色 (hover transition)
   用勾 (✔) 和叉 (✕) 标示
   ========================================================================== */
.compare-matrix-shelf {
  margin: 2rem 0;
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.matrix-header {
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--table-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(18, 27, 47, 0.6);
}

.matrix-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--table-accent);
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.matrix-title::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--table-accent);
  border-radius: 2px;
}

.table-scroll-container {
  width: 100%;
  overflow-x: auto;
  max-height: 480px;
  position: relative;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  min-width: 760px;
  text-align: center;
}

/* 细节：表头粘住 */
.compare-table thead th {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--table-header-bg);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 1rem 1.25rem;
  border-bottom: 2px solid var(--table-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.compare-table thead th:first-child {
  text-align: left;
  width: 28%;
}

.compare-table thead th.col-product {
  width: 24%;
  color: var(--table-accent);
  font-family: var(--font-mono);
}

/* 单元格与行样式 */
.compare-table tbody td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--table-border);
  font-size: 0.9rem;
  color: var(--text-main);
  vertical-align: middle;
}

.compare-table tbody td:first-child {
  text-align: left;
  font-weight: 600;
  color: #ffffff;
}

.feature-meta {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: normal;
  margin-top: 2px;
}

/* 细节：行悬停变色 */
.compare-table tbody tr {
  transition: background-color 0.2s ease;
}

.compare-table tbody tr:hover {
  background-color: var(--table-row-hover); /* 行悬停变色 */
}

/* 勾 (✔) 和 叉 (✕) */
.mark-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  color: var(--check-color);
  font-weight: 800;
  font-size: 1.05rem;
}

.mark-cross {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(100, 116, 139, 0.12);
  color: var(--cross-color);
  font-weight: 700;
  font-size: 0.95rem;
}

.pill-status {
  display: inline-block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--table-accent);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

/* ==========================================================================
   顶栏导航
   ========================================================================== */
.site-header {
  border-bottom: 1px solid var(--table-border);
  background: rgba(8, 12, 22, 0.85);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #ffffff;
  font-weight: 700;
  font-size: 1.15rem;
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

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

.nav a {
  text-decoration: none;
  color: var(--text-sub);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--table-accent);
}

.menu {
  display: none;
  background: transparent;
  border: 1px solid var(--table-border);
  border-radius: 6px;
  padding: 6px;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}

.menu span {
  display: block;
  width: 20px;
  height: 2px;
  background: #ffffff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0.65rem 1.35rem;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--table-accent);
  color: #080c16;
  border: 1px solid var(--table-accent);
}

.btn:hover {
  background: var(--table-accent-hover);
  color: #ffffff;
  border-color: var(--table-accent-hover);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #e2e8f0;
  border: 1px solid var(--table-border);
}

.btn.secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--table-accent);
  color: #ffffff;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--table-border);
  color: var(--table-accent);
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   2. 首屏 #top (Hero)
   ========================================================================== */
.hero {
  padding: 2.5rem 0 3.5rem;
  border-bottom: 1px solid var(--table-border);
}

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.75rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--table-accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.eyebrow i {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--table-accent);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--table-accent);
}

.hero h1 {
  font-size: 2.35rem;
  line-height: 1.25;
  margin-bottom: 1.1rem;
  color: #ffffff;
  letter-spacing: -0.5px;
}

.lead {
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 1.5rem;
}

.actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.tags li {
  font-size: 0.78rem;
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  color: var(--text-sub);
}

.visual-shell {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--table-border);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
}

.visual-shell img {
  width: 100%;
  height: auto;
  display: block;
}

.radar {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: rgba(8, 12, 22, 0.7);
  backdrop-filter: blur(8px);
}

.radar svg {
  max-width: 165px;
}

.score-card {
  background: rgba(21, 30, 51, 0.9);
  border: 1px solid var(--table-border);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.score-card strong {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  color: var(--table-accent);
}

.score-card span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   通用板块
   ========================================================================== */
.section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--table-border);
}

.section.lift {
  background: rgba(15, 22, 38, 0.6);
}

.section-head {
  margin-bottom: 2rem;
}

.section-head h2 {
  font-size: 1.75rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
  letter-spacing: -0.3px;
}

.section-head p {
  color: var(--text-sub);
  font-size: 0.95rem;
}

.grid {
  display: grid;
  gap: 1.25rem;
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

/* 3. 能力实心卡 */
.card {
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--table-accent);
}

.card .kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--table-accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.card h3 {
  font-size: 1.15rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* 4. 场景编号卡 */
.card.scene .num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--table-accent);
  margin-bottom: 0.4rem;
  display: block;
}

/* 5. 产品描边卡 */
.card.ghost {
  background: transparent;
  border: 1px dashed var(--table-border);
}

.card.ghost:hover {
  border-style: solid;
  border-color: var(--table-accent);
}

.card.ghost ul {
  list-style: none;
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--table-border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.card.ghost li {
  font-size: 0.82rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 6px;
}

.card.ghost li::before {
  content: "›";
  color: var(--table-accent);
}

/* 6. 接入 & 7. 入口 */
.check-list {
  list-style: none;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.check-list li {
  font-size: 0.92rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.check-list li::before {
  content: "■";
  color: var(--table-accent);
  font-size: 0.7rem;
}

.experiment, .device {
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  border-radius: 12px;
  padding: 1rem;
}

.experiment img, .device img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

.bars {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bar {
  display: grid;
  grid-template-columns: 80px 1fr 45px;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

.meter {
  display: block;
  height: 8px;
  background: #04060c;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--table-border);
}

.meter i {
  display: block;
  height: 100%;
  background: var(--table-accent);
}

.bar strong {
  color: var(--table-accent);
  text-align: right;
}

/* 8. 数据 */
.data-grid .card {
  text-align: center;
  padding: 1.75rem 1rem;
}

.data-grid strong {
  display: block;
  font-size: 2.35rem;
  font-family: var(--font-mono);
  color: #ffffff;
  margin-bottom: 0.35rem;
}

.data-grid span {
  font-size: 0.85rem;
  color: var(--text-sub);
}

.cta-band {
  margin-top: 1.5rem;
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  border-radius: 10px;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cta-band p {
  font-size: 1rem;
  color: #ffffff;
}

/* 9. 问答 */
.faq-tools {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.faq-tools span {
  font-size: 0.78rem;
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  color: var(--text-sub);
}

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

.faq details {
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}

.faq details[open] {
  border-color: var(--table-accent);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  outline: none;
  color: #ffffff;
}

.faq p {
  margin-top: 0.75rem;
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* 10. 资讯 */
.news-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.news-item {
  background: var(--table-surface);
  border: 1px solid var(--table-border);
  border-radius: 10px;
  padding: 0.85rem;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
  align-items: center;
  transition: transform 0.2s, border-color 0.2s;
}

.news-item:hover {
  transform: translateY(-2px);
  border-color: var(--table-accent);
}

.news-item img {
  width: 100%;
  height: 95px;
  object-fit: cover;
  border-radius: 6px;
}

.news-item .kicker {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--table-accent);
  margin-bottom: 0.25rem;
}

.news-item h3 {
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 0.35rem;
  line-height: 1.35;
}

.news-item .meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 11. 页脚 */
.footer {
  border-top: 1px solid var(--table-border);
  background: #04070d;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-grid h3 {
  font-size: 0.92rem;
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.footer-grid a {
  display: block;
  text-decoration: none;
  color: var(--text-sub);
  font-size: 0.88rem;
  margin-bottom: 0.45rem;
  transition: color 0.2s;
}

.footer-grid a:hover {
  color: var(--table-accent);
}

.footer-grid p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  line-height: 1.6;
}

.copyright {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.25rem;
}

@media (max-width: 1024px) {
  .split {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .menu {
    display: flex;
  }
  .grid-5, .grid-4, .news-list, .footer-grid {
    grid-template-columns: 1fr;
  }
  .news-item {
    grid-template-columns: 110px 1fr;
  }
}