:root {
	
	  --primary: #0066cc;
  --primary-dark: #004c99;
  --secondary: #ff6600;
  --text: #333333;
  --text-light: #666666;
  --bg-light: #f5f8fa;
  --bg-dark: #2c3e50;
  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --border: #e0e0e0;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --transition: all 0.3s ease;
  --container-width: 1200px;
  --header-height: 70px;
	
  --muted: #6c757d;
	

  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --card: #ffffff;
  --muted: #6c757d;
  --text: #333333; /* 提高对比度 */
  --title: #212529;
  --brand: #0066cc;
  --brand-2: #e7f7f3;
  --warn: #f39c12;
  --danger: #e74c3c;
  --ok: #07c08a;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08); 
  
  
  
  
/*     --bg: #0f1115;
  --bg-alt: #12161c;
  --card: #171b22;
  --muted: #a8b0bd;
  --text: #eef2f8;
  --title: #ffffff;
  --brand: #19b89d; */ /* 绿松石调，避免蓝/靛 */
 /*  --brand-2: #e7f7f3;
  --warn: #f39c12;
  --danger: #e74c3c;
  --ok: #07c08a;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35); */
}

/* 无障碍跳过链接 */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 8px;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}




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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC",
    "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol", sans-serif;
  line-height: 1.6;
  
  
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: #fff;
  overflow-x: hidden;
}

@media (max-width: 768px) {
  body {
    font-size: 14px;
  }
  .card, .table-row, .kpi, .bar-group {
    padding: 12px;
  }
}

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

a {
  color: var(--brand);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.section {
  padding: 72px 0;
}
.section.alt {
  background: var(--bg-alt);
}

h1,
h2,
h3 {
  line-height: 1.2;
  color: var(--title);
  margin: 0 0 16px;
}
h1 {
  font-size: clamp(28px, 3.2vw, 44px);
}
h2 {
  font-size: clamp(22px, 2.2vw, 32px);
}
.container.reveal h2 {
  text-align: center;
}
h3 {
  font-size: clamp(18px, 1.6vw, 24px);
  color: var(--title);
}

p {
  margin: 0 0 12px;
}

.lead {
  font-size: clamp(15px, 1.2vw, 18px);
  color: var(--text);
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.bullets {
  list-style: none;
  padding: 0;
  margin: 8px 0 0 0;
}
.bullets li {
  padding-left: 20px;
  position: relative;
  margin: 8px 0;
}
.bullets li::before {
  content: "•";
  color: var(--brand);
  position: absolute;
  left: 0;
  top: 0;
}





.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: #003366; /* 更深的蓝色 */
  color: white;
}

.btn-ghost {
  background-color: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-ghost:hover {
  background-color: var(--primary);
  color: white;
}





/* 
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary {
  background: var(--brand);
  color: #ffffff;
  box-shadow: var(--shadow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  filter: saturate(1.1);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(0, 0, 0, 0.2);
  color: var(--text);
  margin-left: 10px;
}
.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.35);
}
 */
.grid-2 {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
}
@media (max-width: 980px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}
.gap {
  gap: 28px;
}
.mt {
  margin-top: 20px;
}



.hero-note {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 20px;
}

.note {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 20px;
  padding: 15px;
  background-color: rgba(0, 0, 0, 0.03);
  border-radius: var(--radius);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand-logo {
  height: 32px;
  width: auto;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 6px;
  border-radius: 8px;
}
.nav-toggle:focus-visible {
  outline: 2px solid var(--brand);
}
.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 1px;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}
.nav-list a {
  display: inline-flex;
  padding: 8px 10px;
  border-radius: 8px;
}
.nav-list a:hover {
  background: rgba(0, 0, 0, 0.05);
  text-decoration: none;
}

@media (max-width: 880px) {
  .nav-toggle {
    display: inline-block;
  }
  .nav-list {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-list.open {
    max-height: 380px;
  }
  .nav-list li {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
  }

  /* Mobile styles for #cases section */
  #cases {
    padding: 40px 0;
  }
  #cases .container {
    width: 90%;
  }
  #cases h2 {
    font-size: 24px;
    margin-bottom: 20px;
  }
  .cards.cases {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
  }
  .cards.cases > * {
    margin-bottom: 16px;
  }
  @media (max-width: 768px) {
    .cards.cases {
      grid-template-columns: 1fr;
    }
  }
}






/* 英雄区块 */
.hero {
  padding: 100px 0 80px;
}

.hero h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--bg-dark);
}

.hero .lead {
  font-size: 1.1rem;
  margin-bottom: 25px;
}

.bullets {
  list-style: none;
  margin-bottom: 30px;
}

/* FAQ Styles */
.faq-container {
  margin: 20px 0;
}

.faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 16px 20px;
  text-align: left;
  background: var(--bg-alt);
  border: none;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question::after {
  content: "+";
  font-size: 20px;
}

.faq-question.active::after {
  content: "−";
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding: 16px 0;
}

.faq-answer.show {
  max-height: 200px;
}

.bullets li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
}

.bullets li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
}

.hero-cta {
  display: flex;
  gap: 15px;
  margin-top: 30px;
}

.hero-cta a:hover {
  text-decoration: none;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: #003366; /* 更深的蓝色 */
  color: white;
}

.btn-ghost {
  background-color: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-ghost:hover {
  background-color: var(--primary);
  color: white;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  background-color: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 25px;
  width: 100%;
  max-width: 450px;
  position: relative;
}

.hero-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--secondary);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
}

.qr-pair {
  display: flex;
  gap: 20px;
  margin: 30px 0 20px;
}

.qr-item {
  flex: 1;
  text-align: center;
}

.qr-title {
  font-weight: 600;
  margin-bottom: 10px;
}

.qr-box {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 15px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  height: 180px;
  justify-content: center;
}

.qr-box.branded {
  border-color: var(--primary);
  border-style: solid;
}

.qr-placeholder {
  width: 100px;
  height: 100px;
  background-color: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--text-light);
}

.qr-meta {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--success);
}

.qr-meta.weak {
  color: var(--danger);
}

.hero-note {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 20px;
}



















/* Hero */






/* 
.hero {
  padding-top: 88px;
}
.hero-card {
  background: var(--bg);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow);
}
.hero-badge {
  display: inline-block;
  background: var(--brand-2);
  color: #0a1717;
  border-radius: 999px;
  padding: 6px 12px;
  font-weight: 700;
  font-size: 12px;
  margin-bottom: 10px;
}
.qr-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 520px) {
  .qr-pair {
    grid-template-columns: 1fr;
  }
}
.qr-item {
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  padding: 12px;
}
.qr-title {
  font-weight: 700;
  margin-bottom: 10px;
}
.qr-box {
  border: 1px dashed rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  padding: 12px;
  min-height: 140px;
  display: grid;
  place-items: center;
  gap: 8px;
  background: var(--bg-alt);
}
.qr-box.branded {
  background: var(--brand-2);
  border: 1px solid rgba(25, 184, 157, 0.4);
}
.qr-placeholder {
  width: 104px;
  height: 104px;
  background: repeating-linear-gradient(
    45deg,
    rgba(0, 0, 0, 0.05),
    rgba(0, 0, 0, 0.05) 10px,
    rgba(0, 0, 0, 0.1) 10px,
    rgba(0, 0, 0, 0.1) 20px
  );
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.qr-meta {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}
.qr-meta.weak {
  color: var(--muted);
}
*/
/* Cards / Tables */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 980px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.analysis-card {
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.analysis-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
  .analysis-grid {
    grid-template-columns: 1fr;
  }
}
.card {
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.table-compare {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.table-compare .table-row {
  display: flex;
}

.table-compare .table-row.table-head {
  background: #2c3e50;
  color: white;
  font-weight: bold;
}

.table-compare .table-row:not(.table-head):nth-child(even) {
  background: #f8f9fa;
}

.table-compare .table-row > div {
  flex: 1;
  padding: 1rem;
  text-align: center;
  border-right: 1px solid #eee;
  display: flex;
  align-items: center;
  justify-content: center;
}

.table-compare .table-row > div:last-child {
  border-right: none;
}

.table-compare .table-row.table-head > div:first-child {
  flex: 0.8;
}

.table-compare .table-row > div:first-child {
  flex: 0.8;
  font-weight: 600;
  background: rgba(44, 62, 80, 0.03);
}

.table-compare .table-row.table-head > div {
  border-color: rgba(255, 255, 255, 0.1);
}

/* 移动端适配 */
@media (max-width: 768px) {
  .table-compare .table-row {
    flex-direction: column;
  }
  
  .table-compare .table-row.table-head {
    display: none;
  }
  
  .table-compare .table-row > div {
    border-right: none;
    border-bottom: 1px solid #eee;
    text-align: left;
    justify-content: flex-start;
  }
  
  .table-compare .table-row > div:last-child {
    border-bottom: none;
  }
  
  .table-compare .table-row > div:first-child {
    background: rgba(44, 62, 80, 0.1);
    font-weight: bold;
  }
  
  .table-compare .table-row > div:not(:first-child):before {
    content: attr(data-label) ": ";
    font-weight: bold;
    margin-right: 0.5rem;
    color: #2c3e50;
  }
}

/* Lists */
.list-check,
.list-dot,
.list-warn {
  list-style: none;
  margin: 0;
  padding: 0;
}
.list-check li,
.list-dot li,
.list-warn li {
  padding-left: 26px;
  position: relative;
  margin: 8px 0;
}
.list-check li::before {
  content: "✔";
  color: var(--ok);
  position: absolute;
  left: 0;
  top: 0;
}
.list-dot li::before {
  content: "•";
  color: var(--brand);
  position: absolute;
  left: 0;
  top: 0;
}
.list-warn li::before {
  content: "!";
  color: var(--warn);
  position: absolute;
  left: 0;
  top: 0;
}
 
/* Calculator */
.calc {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 20px;
}
@media (max-width: 980px) {
  .calc {
    grid-template-columns: 1fr;
  }
}
.calc-controls {
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 14px;
  padding: 16px;
}

/* 添加Firefox滚动条样式 */
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.25);
  cursor: pointer;
}

input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.1);
}

input[type="range"]::-moz-range-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--primary);
}

/* 添加Edge/IE滚动条样式 */
input[type="range"]::-ms-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.25);
  cursor: pointer;
}

input[type="range"]::-ms-track {
  height: 6px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.1);
  border: none;
  color: transparent;
}

input[type="range"]::-ms-fill-lower {
  height: 6px;
  border-radius: 999px;
  background: var(--primary);
}
.control {
  margin-bottom: 16px;
}
.control label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}




/* 计算器样式 */



.control-row {
  display: flex;
  align-items: center;
  gap: 15px;
}

.control-row input[type="range"] {
  flex: 1;
}

.control-row output {
  min-width: 60px;
  text-align: right;
  font-weight: 600;
  color: var(--text);
}

/* 移动端适配 */
@media (max-width: 768px) {
  .control-row {
    gap: 10px;
  }
  
  .control-row output {
    min-width: 50px;
    font-size: 14px;
  }
  
  .control label {
    font-size: 14px;
  }
}



/* .control-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
} */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--primary) 0%, var(--primary) 50%, rgba(0, 0, 0, 0.1) 50%, rgba(0, 0, 0, 0.1) 100%);
  background-size: 200% 100%;
  background-position: right;
  outline: none;
}



input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.25);
  cursor: pointer;
}
output {
  min-width: 64px;
  display: inline-block;
  text-align: right;
  color: var(--text);
  font-weight: 600;
}

.calc-results {
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 14px;
  padding: 16px;
}

.kpis {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}
@media (max-width: 980px) {
  .kpis {
    grid-template-columns: 1fr 1fr;
  }
}
.kpi {
  background: var(--bg-alt);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  padding: 12px;
}
.kpi.highlight {
  grid-column: span 2;
  border-color: rgba(52, 152, 219, 0.4);
  background: var(--brand-2);
}
.kpi-label {
  font-size: 12px;
  color: var(--muted);
}
.kpi-value {
  font-size: 22px;
  font-weight: 800;
  margin-top: 4px;
}
.kpi-sub {
  margin-top: 4px;
  font-size: 12px;
  color: var(--brand);
}

.bars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 14px;
}
@media (max-width: 980px) {
  .bars {
    grid-template-columns: 1fr;
  }
}
.bar-group {
  background: var(--bg-alt);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  padding: 12px;
}
.bar-title {
  font-weight: 700;
  margin-bottom: 10px;
}
.bar-rows {
  display: grid;
  gap: 12px;
}
.bar-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
  align-items: center;
}
.bar-label {
  color: var(--muted);
  font-size: 13px;
}
.bar-track {
  height: 14px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 999px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  background: #6c757d;
  border-radius: 999px;
  transition: width 0.5s ease;
}
.bar-fill.brand {
  background: var(--brand);
}

/* Methods / Cases */
.methods .card ul,
.card ul {
  margin: 8px 0 0;
}
.cases {
  grid-template-columns: repeat(3, 1fr);
}
.case {
  position: relative;
}
.case-tag {
  position: absolute;
  top: -10px;
  left: 14px;
  background: var(--brand);
  color: #ffffff;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 800;
}
.case-kpis {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.case-kpis span {
  display: inline-flex;
  background: rgba(25, 184, 157, 0.12);
  color: var(--brand);
  border: 1px solid rgba(25, 184, 157, 0.32);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
}

/* Contact */
.contact-list {
  margin: 8px 0 16px;
  padding: 0;
  list-style: none;
}
.app-box {
  height: 120px;
  border: 2px dashed rgba(25, 184, 157, 0.45);
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--brand);
  background: var(--brand-2);
}
.app-box span {
  text-align: center;
  width: 100%;
  display: block;
  padding-top: 43px;
}
.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, auto);
  gap: 16px;
}
@media (max-width: 720px) {
  .qr-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
}
.qr-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.qr-card img, .qr-card .app-box {
  margin: 0 auto;
  display: block;
}
.qr-caption {
  margin-top: 8px;
  color: var(--muted);
  width: 100%;
  text-align: center;
}

/* Footer */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  margin-top: 40px;
}
.footer-inner {
  padding: 28px 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: start;
}
.footer-slogan {
  margin-top: 8px;
  color: var(--muted);
  max-width: 680px;
}
.footer-legal {
  text-align: right;
}
.footer-legal a {
  color:  #0066cc;
}
.icp-line,
.beian-line {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  margin: 6px 0;
}
.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding: 10px 0;
  text-align: center;
  color: var(--muted);
}
@media (max-width: 800px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .footer-legal {
    text-align: left;
  }
}

/* Back to top */
.back-to-top {
	
/*   position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  z-index: 100;	
	
	 */
	
	
	
  position: fixed;
  
    bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
   font-size: 1.5rem;
 /*  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px; */
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  background: var(--primary);
    color: white;
  
/*   background: rgba(255, 255, 255, 0.9);
color: var(--text); */  
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 1;
  pointer-events: auto;
  transition: all 0.2s ease;
  z-index: 100; 
/* 按钮现在始终可见，不再需要 .show 类 */
.back-to-top:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 1);
}

/* 移动设备上的返回顶部按钮样式 */
@media (max-width: 768px) {
  .back-to-top {
    width: 40px;
    height: 40px;
    right: 12px;
    bottom: 12px;
    font-size: 16px;
  }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.6s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  background: var(--text);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 8px;
  z-index: 1000;
}