/* =====================================================================
   dsh-website · 全局样式（深色 + 靛紫渐变，DeepSeek 风格）
   纯原生 HTML 静态站点
   ===================================================================== */

:root {
  --bg: #070a13;
  --bg-soft: #0b0f1c;
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text: #e9edf7;
  --text-soft: #c3cadb;
  --muted: #8b93a9;

  --accent: #00f0ff;
  --accent-2: #00b8c5;
  --accent-3: #7df3ff;
  --grad: linear-gradient(135deg, #00f0ff 0%, #00b8c5 100%);
  --grad-soft: linear-gradient(135deg, rgba(0, 240, 255, 0.16), rgba(0, 184, 197, 0.16));

  --ok: #34d399;
  --warn: #fbbf24;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(2, 6, 20, 0.55);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --mono: 'JetBrains Mono', 'Cascadia Code', Consolas, 'Courier New', monospace;

  --nav-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

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

/* 背景装饰：径向光斑 + 网格 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 480px at 15% -10%, rgba(0, 240, 255, 0.22), transparent 60%),
    radial-gradient(800px 420px at 90% 0%, rgba(0, 184, 197, 0.16), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(125, 243, 255, 0.08), transparent 60%),
    var(--bg);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}

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

img,
svg {
  display: block;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

/* ---------------- 按钮 ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease,
    border-color 0.18s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 240, 255, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 12px 32px rgba(0, 240, 255, 0.5);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border);
  color: var(--text-soft);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-lg {
  padding: 15px 32px;
  font-size: 16px;
  border-radius: 14px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 10px;
}

/* ---------------- 导航 ---------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(7, 10, 19, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.2px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
}

.brand-logo svg {
  width: 36px;
  height: 36px;
}
.brand-logo img {
  width: 36px;
  height: 36px;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 14.5px;
  color: var(--text-soft);
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a.active {
  color: #fff;
  background: var(--grad-soft);
  box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.4);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------------- 通用区块 ---------------- */

.section {
  padding: 96px 0 24px;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.6px;
  color: var(--accent-3);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.eyebrow::before {
  content: '';
  width: 22px;
  height: 1.5px;
  background: var(--grad);
  border-radius: 2px;
}

.eyebrow.centered::after {
  content: '';
  width: 22px;
  height: 1.5px;
  background: var(--grad);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.3px;
}

.section-sub {
  margin-top: 14px;
  color: var(--muted);
  font-size: 16px;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------- Hero ---------------- */

.hero {
  padding: 88px 0 40px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid rgba(0, 240, 255, 0.35);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 22px;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 10px var(--ok);
}

.hero h1 {
  font-size: clamp(40px, 6vw, 66px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -1.5px;
}

.hero h1 .grad-text {
  display: block;
}

.hero-desc {
  margin-top: 22px;
  font-size: 17.5px;
  color: var(--text-soft);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 18px;
  font-size: 13.5px;
  color: var(--muted);
}

.hero-note a {
  color: var(--accent-3);
}

.hero-note a:hover {
  text-decoration: underline;
}

/* ---- 模拟终端 / 代理面板 ---- */

.mock {
  position: relative;
}

.mock-window {
  background: rgba(13, 18, 32, 0.9);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(6px);
}

.mock-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.mock-bar .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.mock-bar .dot.r { background: #ff5f57; }
.mock-bar .dot.y { background: #febc2e; }
.mock-bar .dot.g { background: #28c840; }

.mock-title {
  margin-left: 10px;
  font-size: 12.5px;
  color: var(--muted);
  font-family: var(--mono);
}

.mock-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 13.5px;
}

.msg {
  border-radius: 12px;
  padding: 11px 14px;
  max-width: 92%;
  line-height: 1.6;
}

.msg.user {
  align-self: flex-end;
  background: var(--grad);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg.agent {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--border);
  color: var(--text-soft);
  border-bottom-left-radius: 4px;
  width: 100%;
}

.msg .label {
  display: block;
  font-size: 11px;
  color: var(--accent-3);
  font-family: var(--mono);
  margin-bottom: 4px;
}

.tool-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-soft);
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px dashed var(--border-strong);
}

.tool-line .tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(0, 240, 255, 0.2);
  color: #9ff2ff;
  white-space: nowrap;
}

.progress {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.progress i {
  display: block;
  height: 100%;
  width: 72%;
  border-radius: 999px;
  background: var(--grad);
  animation: grow 2.4s ease-in-out infinite alternate;
}

@keyframes grow {
  from { width: 46%; }
  to { width: 86%; }
}

.mock-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  padding-top: 4px;
}

.mock-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok);
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  50% { opacity: 0.45; }
}

.mock-glow {
  position: absolute;
  inset: -18%;
  background: radial-gradient(60% 55% at 50% 45%, rgba(0, 240, 255, 0.28), transparent 70%);
  z-index: -1;
  filter: blur(10px);
}

/* ---------------- 统计条 ---------------- */

.stats {
  margin-top: 72px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  text-align: center;
  padding: 26px 16px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.stat-value {
  font-size: 30px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------------- 卡片网格 ---------------- */

.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--grad-soft);
  border: 1px solid rgba(0, 240, 255, 0.35);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.card-icon svg {
  width: 22px;
  height: 22px;
  stroke: #8ef0ff;
}

.card h3 {
  font-size: 17.5px;
  font-weight: 700;
  margin-bottom: 8px;
}

.card p {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------------- 生态区 ---------------- */

.eco-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.eco-card::after {
  content: '';
  position: absolute;
  top: -40%;
  right: -25%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.eco-card h3 {
  font-size: 19px;
  font-weight: 800;
}

.eco-card p {
  color: var(--muted);
  font-size: 14.5px;
  flex: 1;
}

.eco-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-3);
}

.eco-link:hover {
  text-decoration: underline;
}

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-soft);
}

/* ---------------- CTA 横幅 ---------------- */

.cta-banner {
  margin: 72px 0 96px;
  border-radius: 22px;
  padding: 56px 40px;
  text-align: center;
  background:
    radial-gradient(600px 300px at 50% -40%, rgba(0, 240, 255, 0.35), transparent 70%),
    var(--bg-soft);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 800;
  letter-spacing: -0.5px;
}

.cta-banner p {
  color: var(--muted);
  margin: 12px auto 28px;
  max-width: 520px;
  font-size: 15.5px;
}

.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------------- 下载页 ---------------- */

.platform-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.platform-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.platform-os {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}

.platform-dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--grad-soft);
  border: 1px solid rgba(0, 240, 255, 0.35);
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
  color: #8ef0ff;
}

.badge {
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--grad);
  color: #fff;
}

.badge.plain {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
  border: 1px solid var(--border);
}

.platform-meta {
  font-size: 13.5px;
  color: var(--muted);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.platform-meta span::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-3);
  margin-right: 7px;
  vertical-align: middle;
}

.dl-btn {
  margin-top: 6px;
  width: 100%;
  justify-content: center;
}

/* 步骤 */
.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
}

.step {
  counter-increment: step;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px 26px 78px;
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 24px;
  top: 24px;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--grad);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(0, 240, 255, 0.35);
}

.step h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.step p {
  color: var(--muted);
  font-size: 14.5px;
}

.step code {
  font-family: var(--mono);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 7px;
  color: #a9f2ff;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 20px;
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 17px 0;
  font-weight: 600;
  font-size: 15.5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 500;
  color: var(--accent-3);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details p {
  padding: 0 0 18px;
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------------- 主题页 ---------------- */

.scheme {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
  background: #fff;
}

.scheme:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.scheme.light {
  --s-bg: #f6f7fb;
  --s-side: #eceef6;
  --s-surface: #ffffff;
  --s-line: #e2e5f0;
  --s-text: #23283a;
  --s-sub: #6b7288;
  --s-accent: #00f0ff;
  --s-bubble: #eef1ff;
}

.scheme.sepia {
  --s-bg: #f3ead9;
  --s-side: #eadfc8;
  --s-surface: #faf3e3;
  --s-line: #d9cbb0;
  --s-text: #4a3f2c;
  --s-sub: #8a7a5c;
  --s-accent: #c07b3a;
  --s-bubble: #f4e6cd;
}

.scheme.dark {
  --s-bg: #0b1022;
  --s-side: #0f1630;
  --s-surface: #131a36;
  --s-line: #26304f;
  --s-text: #e7ecff;
  --s-sub: #8a94b8;
  --s-accent: #6c8bff;
  --s-bubble: #1a2447;
}

.scheme-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--s-line);
  background: var(--s-surface);
}

.scheme-head .t {
  font-weight: 800;
  font-size: 14.5px;
  color: var(--s-text);
}

.scheme-head .en {
  font-size: 11.5px;
  color: var(--s-sub);
  font-family: var(--mono);
}

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

.scheme-dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.scheme-body {
  display: grid;
  grid-template-columns: 92px 1fr;
  min-height: 210px;
  background: var(--s-bg);
}

.scheme-side {
  background: var(--s-side);
  border-right: 1px solid var(--s-line);
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scheme-side i {
  height: 9px;
  border-radius: 5px;
  background: var(--s-line);
}

.scheme-side i:first-child {
  background: var(--s-accent);
  width: 70%;
}

.scheme-main {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scheme-msg {
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 12px;
  color: var(--s-text);
  background: var(--s-surface);
  border: 1px solid var(--s-line);
  width: fit-content;
}

.scheme-msg.user {
  align-self: flex-end;
  background: var(--s-bubble);
  border-color: transparent;
  color: var(--s-text);
}

.scheme-msg .sub {
  display: block;
  margin-top: 3px;
  font-size: 10.5px;
  color: var(--s-sub);
}

.swatch-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 2px;
}

.swatch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--s-sub);
  background: var(--s-surface);
  border: 1px solid var(--s-line);
  border-radius: 999px;
  padding: 4px 11px 4px 6px;
}

.swatch i {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.scheme-name {
  margin-top: 16px;
  text-align: center;
}

.scheme-name .zh {
  font-weight: 800;
  font-size: 16px;
}

.scheme-name .desc {
  font-size: 13px;
  color: var(--muted);
}

/* 安装方式双栏 */
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}

.install-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  margin-bottom: 8px;
}

.install-card > p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.install-card ol {
  margin: 0 0 16px 18px;
  color: var(--text-soft);
  font-size: 14.5px;
  display: grid;
  gap: 6px;
}

.install-card li::marker {
  color: var(--accent-3);
  font-weight: 700;
}

/* ---------------- 代码块 ---------------- */

.code-block {
  margin-top: 16px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0a0e1b;
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.035);
  border-bottom: 1px solid var(--border);
}

.code-head .file {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
}

.copy-btn {
  font-family: inherit;
  font-size: 12.5px;
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 12px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.code-block pre {
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: #cdd6f4;
}

.code-block code {
  font-family: var(--mono);
}

/* ---------------- 页脚 ---------------- */

.footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  background: rgba(7, 10, 19, 0.6);
}

.footer-inner {
  padding: 56px 0 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 14px;
  margin-top: 12px;
  max-width: 280px;
}

.footer h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 0.4px;
}

.footer ul {
  list-style: none;
  display: grid;
  gap: 9px;
}

.footer a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.15s ease;
}

.footer a:hover {
  color: var(--text);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
}

.footer-bottom .heart {
  color: var(--accent-3);
}

/* ---------------- 404 ---------------- */

.notfound {
  text-align: center;
  padding: 120px 0;
}

.notfound .big {
  font-size: 72px;
  font-weight: 900;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.notfound p {
  color: var(--muted);
  margin: 14px 0 28px;
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .mock {
    order: -1;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .install-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    padding-top: 64px;
  }

  .hero {
    padding-top: 56px;
  }

  .nav-links {
    display: none;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    justify-content: center;
    text-align: center;
  }
}