:root {
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #5b21b6;
  --accent: #fbbf24;
  --accent-dark: #f59e0b;
  --success: #10b981;
  --bg: #f8f7ff;
  --bg-alt: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-strong: rgba(255, 255, 255, 0.9);
  --text: #1e1b2e;
  --text-secondary: #4b4562;
  --text-muted: #7a7490;
  --border: rgba(124, 58, 237, 0.14);
  --border-strong: rgba(124, 58, 237, 0.28);
  --shadow-sm: 0 2px 8px rgba(91, 33, 182, 0.06);
  --shadow: 0 8px 28px rgba(91, 33, 182, 0.1);
  --shadow-lg: 0 18px 48px rgba(91, 33, 182, 0.16);
  --shadow-glow: 0 0 0 1px rgba(124, 58, 237, 0.12), 0 12px 36px rgba(124, 58, 237, 0.22);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #a855f7 45%, #ec4899 100%);
  --gradient-accent: linear-gradient(135deg, #fbbf24 0%, #f59e0b 60%, #ef4444 100%);
  --gradient-banner: linear-gradient(120deg, #4c1d95 0%, #7c3aed 40%, #c026d3 75%, #f59e0b 130%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.55));
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
  --max-w: 1200px;
}

[data-theme="dark"] {
  --bg: #0f0b1a;
  --bg-alt: #17122a;
  --bg-glass: rgba(23, 18, 42, 0.72);
  --bg-glass-strong: rgba(23, 18, 42, 0.92);
  --text: #f1eefc;
  --text-secondary: #c9c2e4;
  --text-muted: #948cb4;
  --border: rgba(167, 139, 250, 0.16);
  --border-strong: rgba(167, 139, 250, 0.32);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 0 1px rgba(167, 139, 250, 0.2), 0 12px 36px rgba(124, 58, 237, 0.35);
  --gradient-glass: linear-gradient(135deg, rgba(40, 30, 70, 0.85), rgba(25, 18, 45, 0.6));
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(124, 58, 237, 0.12), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(236, 72, 153, 0.1), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(251, 191, 36, 0.08), transparent 50%);
  background-attachment: fixed;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(124, 58, 237, 0.22), transparent 42%),
    radial-gradient(circle at 88% 18%, rgba(236, 72, 153, 0.16), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(251, 191, 36, 0.1), transparent 50%);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--accent-dark);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.7rem, 4.2vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3.2vw, 2.1rem); }
h3 { font-size: clamp(1.1rem, 2.4vw, 1.4rem); }

p { color: var(--text-secondary); }

::selection {
  background: var(--primary);
  color: #fff;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

/* ===== 通用容器 ===== */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px 80px;
}

main > section {
  margin-bottom: 56px;
  padding: 40px clamp(18px, 4vw, 44px);
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

main > section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0.85;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

main > section:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

main > section > h2 {
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
  padding-bottom: 10px;
}

main > section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
}

main > section > h3,
main > section article > h3 {
  margin: 22px 0 10px;
  color: var(--primary-dark);
}

[data-theme="dark"] main > section > h3,
[data-theme="dark"] main > section article > h3 {
  color: var(--primary-light);
}

main > section p { margin-bottom: 14px; }

/* ===== 面包屑 ===== */
main > nav[aria-label="面包屑导航"] {
  max-width: var(--max-w);
  margin: 0 auto 28px;
  padding: 12px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--text-muted);
  opacity: 0.6;
}

main > nav[aria-label="面包屑导航"] a {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  transition: var(--transition-fast);
}

main > nav[aria-label="面包屑导航"] a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== 头部 ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), box-shadow var(--transition);
}

#site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0.6;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  min-height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover { transform: scale(1.04); }

.logo svg {
  filter: drop-shadow(0 4px 10px rgba(124, 58, 237, 0.4));
  animation: logoPulse 4s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(6deg) scale(1.06); }
}

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

#site-header nav {
  flex: 1 1 auto;
  min-width: 0;
}

#site-header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

#site-header nav a {
  display: inline-block;
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  transition: var(--transition-fast);
  white-space: nowrap;
}

#site-header nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-pill);
  transform: translateX(-50%);
  transition: width var(--transition);
}

#site-header nav a:hover {
  color: var(--primary);
  background: rgba(124, 58, 237, 0.08);
}

#site-header nav a:hover::after { width: 60%; }

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

#site-header form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#site-header input[type="search"] {
  width: 200px;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

#site-header input[type="search"]::placeholder { color: var(--text-muted); }

#site-header input[type="search"]:focus {
  width: 240px;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.14);
}

#site-header button[type="submit"] {
  padding: 9px 18px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
}

#site-header button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(124, 58, 237, 0.5);
}

#theme-toggle {
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--bg-alt);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
  white-space: nowrap;
}

#theme-toggle:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(124, 58, 237, 0.4);
}

/* ===== Banner ===== */
#banner {
  background: var(--gradient-banner);
  background-size: 220% 220%;
  animation: gradientShift 14s ease infinite;
  border: none;
  color: #fff;
  box-shadow: var(--shadow-lg);
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

#banner::before {
  height: 100%;
  background: radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.22), transparent 55%);
  opacity: 1;
}

#banner h1 {
  color: #fff;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.3);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

#banner > p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 880px;
  font-size: 1.02rem;
  position: relative;
  z-index: 1;
  margin-bottom: 28px;
}

.carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
  position: relative;
  z-index: 1;
}

.slide {
  background: var(--bg-glass-strong);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.25);
  position: relative;
}

.slide:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 0 2px rgba(251, 191, 36, 0.5);
}

.slide img {
  width: 100%;
  aspect-ratio: 5 / 2;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide:hover img { transform: scale(1.08); }

.slide h3 {
  padding: 16px 18px 4px;
  color: var(--text);
  font-size: 1.08rem;
}

.slide p {
  padding: 0 18px 18px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* ===== 数据统计 ===== */
#stats ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}

#stats li {
  text-align: center;
  padding: 26px 16px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

#stats li::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.2), transparent 70%);
  transition: transform var(--transition);
}

#stats li:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

#stats li:hover::after { transform: scale(1.6); }

#stats strong {
  display: block;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 6px;
}

/* ===== 产品优势列表 ===== */
#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

#products ul li {
  padding: 18px 18px 18px 46px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  font-size: 0.94rem;
  color: var(--text-secondary);
  position: relative;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#products ul li::before {
  content: "✦";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-dark);
  font-size: 1.1rem;
  transition: transform var(--transition);
}

#products ul li:hover {
  transform: translateX(6px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

#products ul li:hover::before { transform: translateY(-50%) rotate(180deg) scale(1.2); }

/* ===== 客户评价 ===== */
#cases blockquote {
  margin: 18px 0;
  padding: 22px 26px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  border-left: 5px solid var(--primary);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote::before {
  content: "“";
  position: absolute;
  top: -10px;
  left: 14px;
  font-size: 3.4rem;
  color: var(--primary);
  opacity: 0.18;
  font-family: Georgia, serif;
  line-height: 1;
}

#cases blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

#cases blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

#cases blockquote footer {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
}

#cases blockquote footer::before { content: "— "; }

/* ===== 新闻 & 文章卡片 ===== */
#news article,
#articles article {
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

#news article:hover::before,
#articles article:hover::before { transform: scaleY(1); }

#news article h3,
#articles article h3 {
  color: var(--text);
  margin-bottom: 8px;
  font-size: 1.08rem;
}

#news time,
#articles time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: rgba(124, 58, 237, 0.1);
  margin-bottom: 10px;
}

#articles article a {
  display: inline-block;
  margin-top: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
  color: #fff;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

#articles article a:hover {
  transform: translateY(-2px) translateX(4px);
  box-shadow: 0 8px 22px rgba(124, 58, 237, 0.5);
  color: #fff;
}

/* ===== FAQ 手风琴 ===== */
#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

#faq details[open] {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

#faq summary {
  padding: 16px 46px 16px 20px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  position: relative;
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  line-height: 24px;
  text-align: center;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.12);
  color: var(--primary);
  font-size: 1.2rem;
  font-weight: 700;
  transition: var(--transition);
}

#faq details[open] summary::after {
  content: "−";
  background: var(--gradient-primary);
  color: #fff;
  transform: translateY(-50%) rotate(180deg);
}

#faq summary:hover {
  background: rgba(124, 58, 237, 0.06);
  color: var(--primary);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
  animation: fadeSlideDown 0.35s ease;
}

@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== HowTo ===== */
#howto ol {
  counter-reset: step;
  display: grid;
  gap: 12px;
  margin: 16px 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 16px 18px 16px 58px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.94rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
}

#howto ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 18px;
}

#howto ul li {
  padding-left: 26px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

#howto ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.18);
}

/* ===== 联系我们 ===== */
#contact address {
  font-style: normal;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  margin-bottom: 18px;
  display: grid;
  gap: 8px;
}

#contact address p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

#contact address a {
  font-weight: 600;
  border-bottom: 1px dashed var(--primary);
  transition: var(--transition-fast);
}

#contact address a:hover {
  color: var(--accent-dark);
  border-bottom-color: var(--accent-dark);
}

/* ===== 站点地图 & 友情链接 ===== */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap a,
#links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--gradient-glass);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

#sitemap a:hover,
#links a:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(124, 58, 237, 0.4);
}

/* ===== 法律与 EEAT ===== */
#legal h3,
#eeat h3 {
  margin-top: 20px;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
}

#eeat p {
  font-size: 0.94rem;
}

/* ===== 页脚 ===== */
footer {
  margin-top: 40px;
  padding: 48px 20px 40px;
  background: linear-gradient(180deg, transparent, rgba(124, 58, 237, 0.08));
  border-top: 1px solid var(--border);
  text-align: center;
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: min(320px, 70%);
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
}

footer p {
  max-width: 760px;
  margin: 0 auto 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

#back-to-top {
  margin-top: 18px;
  padding: 11px 28px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}

#back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(124, 58, 237, 0.55);
  filter: brightness(1.08);
}

#back-to-top:active { transform: translateY(-1px); }

/* ===== 滚动动画 ===== */
@keyframes revealUp {
  from { opacity: 0; transform: translateY(36px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes revealScale {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}

main > section {
  animation: revealUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-timeline: view();
  animation-range: entry 0% cover 28%;
}

@supports not (animation-timeline: view()) {
  main > section {
    animation: revealUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}

#banner { animation: revealScale 0.8s cubic-bezier(0.16, 1, 0.3, 1) both; }

#stats li,
#products ul li,
#news article,
#articles article,
#faq details,
#howto ol li {
  animation: revealUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-timeline: view();
  animation-range: entry 0% cover 22%;
}

#stats li:nth-child(2) { animation-delay: 0.06s; }
#stats li:nth-child(3) { animation-delay: 0.12s; }
#stats li:nth-child(4) { animation-delay: 0.18s; }

/* ===== 响应式：平板 ===== */
@media (max-width: 1024px) {
  .header-inner { gap: 14px; }
  #site-header nav a { padding: 6px 10px; font-size: 0.85rem; }
  #site-header input[type="search"] { width: 160px; }
  #site-header input[type="search"]:focus { width: 190px; }
}

/* ===== 响应式：手机 ===== */
@media (max-width: 768px) {
  :root { --header-h: 60px; }

  body { font-size: 15px; }

  main { padding: 0 14px 60px; }

  main > section {
    margin-bottom: 36px;
    padding: 26px 18px;
    border-radius: var(--radius);
  }

  .header-inner {
    padding: 10px 14px;
    gap: 10px;
  }

  .logo { font-size: 1rem; }
  .logo svg { width: 32px; height: 32px; }

  #site-header nav {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  #site-header nav::-webkit-scrollbar { display: none; }

  #site-header nav ul {
    flex-wrap: nowrap;
    gap: 2px;
    padding-bottom: 4px;
  }

  #site-header nav a { font-size: 0.82rem; padding: 6px 10px; }

  #site-header form[role="search"] {
    flex: 1 1 auto;
    order: 2;
  }

  #site-header input[type="search"] {
    width: 100%;
    min-width: 0;
    padding: 8px 14px;
  }

  #site-header input[type="search"]:focus { width: 100%; }

  #site-header button[type="submit"] { padding: 8px 14px; }

  #theme-toggle {
    order: 2;
    padding: 8px 12px;
    font-size: 0.8rem;
  }

  #banner h1 { font-size: 1.45rem; }
  #banner > p { font-size: 0.92rem; }

  .carousel { grid-template-columns: 1fr; gap: 16px; }

  #stats ul { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  #stats li { padding: 18px 10px; font-size: 0.82rem; }

  #products ul { grid-template-columns: 1fr; }

  #news article,
  #articles article { padding: 18px 16px; }

  #faq summary { padding: 14px 44px 14px 16px; font-size: 0.94rem; }

  #howto ol li { padding: 14px 14px 14px 52px; font-size: 0.9rem; }

  #sitemap ul,
  #links ul { gap: 8px; }

  #sitemap a,
  #links a { padding: 7px 13px; font-size: 0.82rem; }

  footer { padding: 36px 16px 32px; }
}

@media (max-width: 420px) {
  #stats ul { grid-template-columns: 1fr; }
  #site-header button[type="submit"] { display: none; }
  #theme-toggle { font-size: 0.75rem; padding: 7px 10px; }
}

/* ===== 无障碍与动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===== 打印 ===== */
@media print {
  #site-header,
  #back-to-top,
  #theme-toggle,
  form[role="search"] { display: none !important; }

  body { background: #fff; color: #000; }

  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    background: #fff;
    backdrop-filter: none;
    page-break-inside: avoid;
  }
}