/* ============================================================
   LibreHardwareMonitor 官方推广网站 - 全局样式
   扁平 · 现代 · 专业 · 配色取自 Logo（深灰 + 亮黄 + 银灰）
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 品牌色（取自 Logo） */
  --color-dark: #2b2b2b;          /* 深灰 - 主背景/导航 */
  --color-dark-2: #1f1f1f;        /* 更深 - 页脚 */
  --color-dark-3: #3a3a3a;        /* 卡片底 */
  --color-yellow: #ffc107;        /* 亮黄 - 主强调色 */
  --color-yellow-deep: #f5aa00;   /* 深黄 - hover */
  --color-yellow-soft: #fff4d6;   /* 浅黄 - 背景 */
  --color-silver: #b0b0b0;        /* 银灰 - 辅助 */
  --color-silver-2: #e0e0e0;      /* 浅银 - 边框 */

  /* 中性色 */
  --color-bg: #f8f9fa;            /* 页面背景 */
  --color-bg-alt: #ffffff;        /* 卡片背景 */
  --color-text: #2b2b2b;          /* 主文字 */
  --color-text-2: #555;           /* 次文字 */
  --color-text-3: #888;           /* 辅文字 */
  --color-border: #e9ecef;        /* 边框 */
  --color-success: #28a745;
  --color-info: #2196f3;
  --color-danger: #e53935;

  /* 排版 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
               "Noto Sans SC", -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* 间距与圆角 */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
  --shadow-yellow: 0 8px 24px rgba(255,193,7,.35);

  /* 布局 */
  --container: 1200px;
  --header-h: 68px;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-dark); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-yellow-deep); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
:focus-visible { outline: 2px solid var(--color-yellow); outline-offset: 2px; }

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 88px 0; }
.section-sm { padding: 56px 0; }
.section-alt { background: #fff; }

/* ---------- 标题区 ---------- */
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-yellow-deep);
  background: var(--color-yellow-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.25;
  color: var(--color-dark);
}
.section-head p {
  margin-top: 16px;
  font-size: 17px;
  color: var(--color-text-2);
}
.section-head .lead { color: var(--color-text-2); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(43,43,43,.96);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.01em;
}
.brand:hover { color: #fff; }
.brand img { width: 36px; height: 36px; border-radius: 8px; }
.brand small { display:block; font-size: 11px; font-weight: 500; color: var(--color-silver); letter-spacing:.04em; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: rgba(255,255,255,.82);
  font-size: 15px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: 8px;
  transition: all .2s;
}
.nav a:hover { color: #fff; background: rgba(255,255,255,.08); }
.nav a.active { color: var(--color-yellow); background: rgba(255,193,7,.12); }

.nav-cta {
  margin-left: 10px;
  padding: 9px 20px !important;
  background: var(--color-yellow);
  color: var(--color-dark) !important;
  border-radius: 999px;
  font-weight: 700 !important;
}
.nav-cta:hover { background: var(--color-yellow-deep); color: var(--color-dark) !important; transform: translateY(-1px); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  color: #fff;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 24px; height: 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 999px;
  transition: all .25s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
  white-space: nowrap;
}
.btn svg { width: 20px; height: 20px; }
.btn-primary {
  background: var(--color-yellow);
  color: var(--color-dark);
  box-shadow: var(--shadow-yellow);
}
.btn-primary:hover {
  background: var(--color-yellow-deep);
  color: var(--color-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(255,193,7,.45);
}
.btn-dark {
  background: var(--color-dark);
  color: #fff;
}
.btn-dark:hover { background: var(--color-dark-2); color: #fff; transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--color-dark);
  border: 2px solid var(--color-dark);
}
.btn-outline:hover { background: var(--color-dark); color: #fff; }
.btn-light {
  background: #fff;
  color: var(--color-dark);
  border: 1px solid var(--color-border);
}
.btn-light:hover { background: var(--color-bg); transform: translateY(-2px); }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn-block { display: flex; width: 100%; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(255,193,7,.18), transparent 60%),
    linear-gradient(180deg, var(--color-dark) 0%, #232323 100%);
  color: #fff;
  padding: 96px 0 110px;
  overflow: hidden;
}
.hero::after {
  content:"";
  position:absolute; left:0; right:0; bottom:0; height:80px;
  background: linear-gradient(180deg, transparent, var(--color-bg));
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,193,7,.14);
  border: 1px solid rgba(255,193,7,.4);
  color: var(--color-yellow);
  font-size: 13px; font-weight: 600;
  padding: 7px 14px; border-radius: 999px;
  margin-bottom: 24px;
}
.hero-badge .dot { width:8px; height:8px; border-radius:50%; background: var(--color-yellow); box-shadow:0 0 0 4px rgba(255,193,7,.25); }
.hero h1 {
  font-size: clamp(34px, 5.2vw, 56px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.025em;
  margin-bottom: 22px;
}
.hero h1 .hl { color: var(--color-yellow); }
.hero p.lead {
  font-size: 19px;
  color: rgba(255,255,255,.82);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 36px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 36px; }
.hero-stats .stat .num {
  font-size: 30px; font-weight: 800; color: #fff;
  display:flex; align-items:baseline; gap:4px;
}
.hero-stats .stat .num span { font-size: 18px; color: var(--color-yellow); }
.hero-stats .stat .label { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 2px; }

.hero-visual { position: relative; }
.hero-visual .card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 14px;
  box-shadow: var(--shadow-lg);
}
.hero-visual img { width: 100%; border-radius: 10px; }
.hero-visual .float-tag {
  position: absolute;
  background: #fff;
  color: var(--color-dark);
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 600;
}
.hero-visual .float-tag .ic {
  width: 32px; height: 32px; border-radius: 8px;
  display:flex; align-items:center; justify-content:center;
  background: var(--color-yellow); color: var(--color-dark);
}
.hero-visual .float-tag .ic svg { width:18px;height:18px; }
.hero-visual .tag-1 { top: 18px; left: -22px; animation: floaty 4s ease-in-out infinite; }
.hero-visual .tag-2 { bottom: 30px; right: -22px; animation: floaty 4s ease-in-out infinite .8s; }
@keyframes floaty { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

/* ---------- 特性卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all .3s;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255,193,7,.5);
}
.feature-card .ic {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-yellow-soft);
  color: var(--color-yellow-deep);
  margin-bottom: 20px;
}
.feature-card .ic svg { width: 28px; height: 28px; }
.feature-card h3 {
  font-size: 20px; font-weight: 700; color: var(--color-dark);
  margin-bottom: 10px;
}
.feature-card p { font-size: 15px; color: var(--color-text-2); }

/* ---------- 使用场景 ---------- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.scenario-card {
  position: relative;
  display: flex;
  gap: 22px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all .3s;
  overflow: hidden;
}
.scenario-card::before {
  content:"";
  position:absolute; left:0; top:0; bottom:0; width:4px;
  background: var(--color-yellow);
  transform: scaleY(0); transform-origin: top;
  transition: transform .3s;
}
.scenario-card:hover::before { transform: scaleY(1); }
.scenario-card:hover { box-shadow: var(--shadow); transform: translateX(4px); }
.scenario-card .ic {
  flex-shrink: 0;
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--color-dark);
  color: var(--color-yellow);
  display:flex; align-items:center; justify-content:center;
}
.scenario-card .ic svg { width: 28px; height: 28px; }
.scenario-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; color: var(--color-dark); }
.scenario-card p { font-size: 15px; color: var(--color-text-2); }

/* ---------- 用户评价 ---------- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex; flex-direction: column;
  transition: all .3s;
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.review-card .stars { color: var(--color-yellow); font-size: 16px; letter-spacing: 2px; margin-bottom: 14px; }
.review-card .text {
  font-size: 15.5px;
  color: var(--color-text);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 22px;
}
.review-card .text::before { content: "\201C"; font-size: 36px; color: var(--color-yellow); line-height: 0; vertical-align: -10px; margin-right: 4px; }
.review-card .who { display: flex; align-items: center; gap: 12px; }
.review-card .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-dark); color: var(--color-yellow);
  display:flex; align-items:center; justify-content:center;
  font-weight: 700; font-size: 16px;
}
.review-card .who .name { font-weight: 700; color: var(--color-dark); font-size: 15px; }
.review-card .who .meta { font-size: 13px; color: var(--color-text-3); }

/* ---------- 硬件支持列表 ---------- */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.hardware-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px 16px;
  text-align: center;
  transition: all .3s;
}
.hardware-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--color-yellow); }
.hardware-card .ic { width:48px; height:48px; margin: 0 auto 14px; color: var(--color-dark); }
.hardware-card .ic svg { width:100%; height:100%; }
.hardware-card h4 { font-size: 15px; font-weight: 700; color: var(--color-dark); margin-bottom: 4px; }
.hardware-card p { font-size: 12.5px; color: var(--color-text-3); }

/* ---------- CTA 区 ---------- */
.cta-band {
  background:
    radial-gradient(800px 400px at 90% 50%, rgba(255,193,7,.25), transparent 60%),
    linear-gradient(135deg, var(--color-dark), #1a1a1a);
  border-radius: var(--radius-xl);
  padding: 64px 56px;
  color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  position: relative; overflow: hidden;
}
.cta-band h2 { font-size: clamp(26px, 3.5vw, 36px); font-weight: 800; line-height: 1.2; margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,.78); font-size: 17px; max-width: 560px; }
.cta-band .btn { flex-shrink: 0; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--color-dark-2);
  color: rgba(255,255,255,.7);
  padding: 72px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
.footer-col a { display: block; color: rgba(255,255,255,.65); font-size: 14px; padding: 5px 0; }
.footer-col a:hover { color: var(--color-yellow); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,.5);
}
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--color-yellow); }

/* ---------- 下载弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(20,20,20,.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center; justify-content: center;
  z-index: 2000;
  padding: 20px;
  opacity: 0;
  transition: opacity .25s;
}
.modal-overlay.show { display: flex; opacity: 1; }
.modal {
  background: #fff;
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 760px;
  max-height: 90vh;
  overflow: auto;
  box-shadow: 0 30px 80px rgba(0,0,0,.4);
  transform: translateY(20px) scale(.98);
  transition: transform .3s cubic-bezier(.4,0,.2,1);
}
.modal-overlay.show .modal { transform: translateY(0) scale(1); }
.modal-head {
  position: relative;
  background: linear-gradient(135deg, var(--color-dark), #1a1a1a);
  color: #fff;
  padding: 32px 40px 28px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.modal-head .eyebrow { color: var(--color-yellow); font-size: 13px; font-weight: 600; letter-spacing:.1em; text-transform: uppercase; }
.modal-head h3 { font-size: 26px; font-weight: 800; margin-top: 6px; }
.modal-head p { color: rgba(255,255,255,.7); font-size: 14px; margin-top: 8px; }
.modal-close {
  position: absolute; top: 18px; right: 18px;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,.12);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  transition: all .2s;
}
.modal-close:hover { background: rgba(255,255,255,.25); transform: rotate(90deg); }
.modal-body { padding: 32px 40px 36px; }
.qr-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.qr-item {
  text-align: center;
  padding: 24px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all .25s;
}
.qr-item:hover { border-color: var(--color-yellow); box-shadow: var(--shadow); transform: translateY(-3px); }
.qr-item .qr-img {
  width: 180px; height: 180px;
  margin: 0 auto 14px;
  padding: 10px;
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--color-border);
}
.qr-item .qr-img img { width: 100%; height: 100%; }
.qr-item h4 { font-size: 16px; font-weight: 700; color: var(--color-dark); margin-bottom: 4px; }
.qr-item .meta { font-size: 12.5px; color: var(--color-text-3); margin-bottom: 12px; }
.qr-item .dl-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600;
  color: var(--color-yellow-deep);
}
.qr-item .dl-link svg { width: 14px; height: 14px; }
.modal-tips {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--color-yellow-soft);
  border-left: 3px solid var(--color-yellow);
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--color-text-2);
}
.modal-tips strong { color: var(--color-dark); }

/* ---------- 通用页面头（子页） ---------- */
.page-hero {
  background:
    radial-gradient(900px 400px at 80% -20%, rgba(255,193,7,.15), transparent 60%),
    linear-gradient(180deg, var(--color-dark), #262626);
  color: #fff;
  padding: 72px 0 64px;
  text-align: center;
}
.page-hero .eyebrow {
  display:inline-block; color: var(--color-yellow);
  font-size: 13px; font-weight: 600; letter-spacing:.12em; text-transform: uppercase;
  margin-bottom: 14px;
}
.page-hero h1 { font-size: clamp(32px, 4.5vw, 46px); font-weight: 800; letter-spacing:-.02em; }
.page-hero p { color: rgba(255,255,255,.78); font-size: 17px; max-width: 640px; margin: 16px auto 0; }
.breadcrumb {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-3);
  padding: 12px 0;
}
.breadcrumb a { color: var(--color-text-3); }
.breadcrumb a:hover { color: var(--color-yellow-deep); }
.breadcrumb .sep { margin: 0 8px; color: var(--color-silver); }
.breadcrumb .cur { color: var(--color-dark); font-weight: 600; }

/* ---------- 文档/特性长内容 ---------- */
.prose { max-width: 860px; margin: 0 auto; }
.prose h2 { font-size: 28px; font-weight: 800; color: var(--color-dark); margin: 40px 0 16px; letter-spacing:-.01em; }
.prose h3 { font-size: 21px; font-weight: 700; color: var(--color-dark); margin: 28px 0 12px; }
.prose p { font-size: 16px; color: var(--color-text); margin-bottom: 16px; }
.prose ul, .prose ol { margin: 0 0 18px 4px; }
.prose li { position: relative; padding-left: 28px; margin-bottom: 10px; color: var(--color-text); }
.prose ul li::before {
  content:""; position:absolute; left:6px; top:10px;
  width:8px; height:8px; border-radius:2px; background: var(--color-yellow);
}
.prose ol { counter-reset: li; }
.prose ol li { padding-left: 36px; }
.prose ol li::before {
  counter-increment: li; content: counter(li);
  position:absolute; left:0; top:1px;
  width: 22px; height: 22px; border-radius:50%;
  background: var(--color-dark); color: var(--color-yellow);
  font-size: 12px; font-weight: 700;
  display:flex; align-items:center; justify-content:center;
}
.prose code {
  font-family: var(--font-mono);
  background: #f4f4f5;
  color: #c41a16;
  padding: 2px 7px; border-radius: 4px;
  font-size: 14px;
}
.prose pre {
  background: var(--color-dark);
  color: #e8e8e8;
  padding: 20px 24px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 18px 0 22px;
  font-size: 14px;
  line-height: 1.6;
}
.prose pre code { background: transparent; color: inherit; padding: 0; }
.prose blockquote {
  border-left: 4px solid var(--color-yellow);
  background: var(--color-yellow-soft);
  padding: 14px 20px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0;
  color: var(--color-text);
}
.prose table {
  width: 100%; border-collapse: collapse; margin: 18px 0;
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.prose th, .prose td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--color-border); font-size: 15px; }
.prose th { background: var(--color-bg); font-weight: 700; color: var(--color-dark); }
.prose tr:last-child td { border-bottom: none; }

/* 文档侧栏布局 */
.docs-layout { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; }
.docs-toc {
  position: sticky; top: calc(var(--header-h) + 24px);
  background: #fff; border:1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 22px;
}
.docs-toc h4 { font-size: 13px; text-transform: uppercase; letter-spacing:.1em; color: var(--color-text-3); margin-bottom: 14px; }
.docs-toc a { display:block; padding: 7px 12px; font-size: 14px; color: var(--color-text-2); border-radius: 6px; border-left: 2px solid transparent; }
.docs-toc a:hover, .docs-toc a.active { background: var(--color-yellow-soft); color: var(--color-dark); border-left-color: var(--color-yellow); font-weight:600; }

/* ---------- 下载页专属 ---------- */
.dl-grid { display:grid; grid-template-columns: repeat(2,1fr); gap:24px; }
.dl-card {
  background:#fff; border:1.5px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 32px 28px;
  display:flex; flex-direction:column; transition: all .3s;
  position: relative;
}
.dl-card.featured { border-color: var(--color-yellow); box-shadow: var(--shadow); }
.dl-card.featured::before {
  content: "推荐"; position:absolute; top:-12px; left: 28px;
  background: var(--color-yellow); color: var(--color-dark);
  font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px;
}
.dl-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.dl-card .ic { width:56px; height:56px; border-radius: 14px; background: var(--color-dark); color: var(--color-yellow); display:flex; align-items:center; justify-content:center; margin-bottom: 18px; }
.dl-card .ic svg { width: 30px; height: 30px; }
.dl-card h3 { font-size: 20px; font-weight: 800; color: var(--color-dark); margin-bottom: 6px; }
.dl-card .ver { font-size: 13px; color: var(--color-text-3); margin-bottom: 16px; }
.dl-card .desc { font-size: 14.5px; color: var(--color-text-2); flex: 1; margin-bottom: 18px; }
.dl-card .meta-list { font-size: 13px; color: var(--color-text-2); margin-bottom: 20px; }
.dl-card .meta-list li { padding: 4px 0; display:flex; gap:8px; align-items:center; }
.dl-card .meta-list svg { width:14px;height:14px; color: var(--color-success); flex-shrink:0; }

/* ---------- 步骤 ---------- */
.steps { display:grid; grid-template-columns: repeat(4,1fr); gap: 24px; counter-reset: step; }
.step {
  background:#fff; border:1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 28px 24px;
  position: relative; counter-increment: step;
}
.step .num {
  width:40px; height:40px; border-radius:50%;
  background: var(--color-dark); color: var(--color-yellow);
  font-weight: 800; font-size: 18px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom: 16px;
}
.step h4 { font-size: 17px; font-weight: 700; color: var(--color-dark); margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--color-text-2); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: #fff; border:1px solid var(--color-border);
  border-radius: var(--radius); margin-bottom: 14px; overflow: hidden;
}
.faq-q {
  width: 100%; text-align: left;
  padding: 20px 24px;
  font-size: 16px; font-weight: 600; color: var(--color-dark);
  display:flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-q .arrow { transition: transform .3s; color: var(--color-yellow-deep); flex-shrink:0; }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  padding: 0 24px;
  color: var(--color-text-2); font-size: 15px;
}
.faq-item.open .faq-a { max-height: 400px; padding: 0 24px 22px; }

/* ---------- 数据统计带 ---------- */
.stat-band { display:grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.stat-box {
  text-align:center; padding: 28px 16px;
  background: #fff; border:1px solid var(--color-border); border-radius: var(--radius-lg);
}
.stat-box .num { font-size: 38px; font-weight: 900; color: var(--color-dark); line-height:1; }
.stat-box .num .suffix { color: var(--color-yellow-deep); font-size: 24px; }
.stat-box .label { font-size: 14px; color: var(--color-text-3); margin-top: 8px; }

/* ---------- 时间线（关于页） ---------- */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 32px; }
.timeline::before { content:""; position:absolute; left:8px; top:6px; bottom:6px; width:2px; background: var(--color-silver-2); }
.tl-item { position: relative; padding-bottom: 32px; }
.tl-item::before { content:""; position:absolute; left:-32px; top:4px; width:18px; height:18px; border-radius:50%; background: var(--color-yellow); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--color-yellow); }
.tl-item .yr { font-size: 13px; font-weight: 700; color: var(--color-yellow-deep); }
.tl-item h4 { font-size: 18px; font-weight: 700; color: var(--color-dark); margin: 4px 0 6px; }
.tl-item p { font-size: 15px; color: var(--color-text-2); }

/* ---------- 显示动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 540px; margin: 0 auto; }
  .feature-grid, .review-grid, .dl-grid { grid-template-columns: repeat(2, 1fr); }
  .hardware-grid { grid-template-columns: repeat(3, 1fr); }
  .scenario-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(2,1fr); }
  .stat-band { grid-template-columns: repeat(2,1fr); }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-toc { position: static; }
  .cta-band { flex-direction: column; text-align: center; padding: 48px 32px; }
}

@media (max-width: 720px) {
  .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
         background: var(--color-dark); flex-direction: column; align-items: stretch;
         padding: 16px; gap: 4px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 16px; border-radius: 8px; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .nav-toggle { display: flex; }
  .section { padding: 60px 0; }
  .feature-grid, .review-grid, .dl-grid, .qr-row { grid-template-columns: 1fr; }
  .hardware-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .steps { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: repeat(2,1fr); }
  .hero { padding: 60px 0 80px; }
  .cta-band { padding: 36px 24px; }
  .modal-head, .modal-body { padding: 24px; }
  .hero-stats { gap: 22px; }
  .hero-visual .float-tag { display: none; }
}

/* 打印优化 */
@media print {
  .site-header, .site-footer, .nav-cta, .modal-overlay { display: none !important; }
  body { background: #fff; }
}