/* ============================================
 * 多趣赚官网核心样式 - DQZ Core Style
 * 成都一辰时刻科技有限公司
 * Version: 2.0.0
 * ============================================ */

/*===== CSS Custom Properties =====*/
:root {
  --primary: #0066FF;
  --primary-dark: #0052CC;
  --accent: #00C9A7;
  --accent-light: #E6FBF5;
  --cta: #FF6B35;
  --cta-hover: #E55A2B;
  --bg-light: #F4F7FC;
  --bg-dark: #0F172A;
  --bg-section: #F8FAFD;
  --text-main: #1E293B;
  --text-secondary: #64748B;
  --text-light: #94A3B8;
  --border-color: #E2E8F0;
  --card-shadow: 0 4px 24px rgba(0,102,255,0.08);
  --card-hover-shadow: 0 8px 32px rgba(0,102,255,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/*===== Base Reset =====*/
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-main);
  background: #fff;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}

h1 { font-size: 42px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
h4 { font-size: 20px; }
h5 { font-size: 17px; }

p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

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

a:hover, a:focus {
  color: var(--primary-dark);
  text-decoration: none;
  outline: none;
}

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

/*===== Layout Utilities =====*/
.dqz-wrap {
  position: relative;
  min-height: 100vh;
}

.dqz-section {
  padding: 90px 0;
}

.dqz-section--alt {
  background: var(--bg-section);
}

.dqz-section-header {
  text-align: center;
  margin-bottom: 60px;
}

.dqz-section-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.dqz-section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.dqz-section-subtitle {
  font-size: 16px;
  color: var(--text-light);
  margin-top: 18px;
  font-weight: 400;
}

.dqz-text-center { text-align: center; }
.dqz-text-left { text-align: left; }

/*===== Buttons =====*/
.dqz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 36px;
  border-radius: var(--radius-xl);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  gap: 8px;
}

.dqz-btn--primary {
  background: var(--cta);
  color: #fff;
  border-color: var(--cta);
  box-shadow: 0 4px 16px rgba(255,107,53,0.3);
}

.dqz-btn--primary:hover {
  background: var(--cta-hover);
  border-color: var(--cta-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255,107,53,0.4);
}

.dqz-btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

.dqz-btn--outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  color: #fff;
}

.dqz-btn--solid {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,102,255,0.3);
}

.dqz-btn--solid:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,102,255,0.4);
}

.dqz-btn--lg {
  padding: 16px 48px;
  font-size: 17px;
}

/*===== Top Navigation =====*/
.dqz-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border-color);
  padding: 0;
  transition: var(--transition);
}

.dqz-topbar.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.dqz-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.dqz-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.dqz-brand img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.dqz-brand:hover {
  color: var(--primary-dark);
}

.dqz-nav-list {
  display: flex;
  list-style: none;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.dqz-nav-list li a {
  display: block;
  padding: 8px 18px;
  color: var(--text-main);
  font-weight: 500;
  font-size: 15px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.dqz-nav-list li a:hover,
.dqz-nav-list li.active a {
  color: var(--primary);
  background: rgba(0,102,255,0.06);
}

.dqz-mobile-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.dqz-mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 1px;
}

/*===== Hero Section =====*/
.dqz-hero {
  background: linear-gradient(135deg, #0052CC 0%, #0066FF 40%, #00C9A7 100%);
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.dqz-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.dqz-hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0,201,167,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.dqz-hero__text {
  color: #fff;
  padding-top: 40px;
  position: relative;
  z-index: 2;
}

.dqz-hero__title {
  font-size: 52px;
  font-weight: 900;
  color: #fff;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.dqz-hero__tagline {
  font-size: 22px;
  font-weight: 300;
  color: rgba(255,255,255,0.85);
  margin-bottom: 24px;
}

.dqz-hero__desc {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 520px;
}

.dqz-hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* 桌面端二维码 */
.dqz-hero__download-row {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 20px;
}
.dqz-hero__qr {
  flex-shrink: 0;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 16px 20px 12px;
  text-align: center;
}
.dqz-hero__qr img {
  display: block;
  border-radius: 8px;
  background: #fff;
  padding: 6px;
}
.dqz-hero__qr-tip {
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  margin-top: 8px;
  margin-bottom: 0;
}

.dqz-hero__platforms {
  display: flex;
  gap: 20px;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

.dqz-hero__platforms li {
  color: rgba(255,255,255,0.6);
  font-size: 28px;
}

.dqz-hero__visual {
  position: relative;
  z-index: 2;
  text-align: center;
}

.dqz-hero__carousel .item {
  padding: 10px;
}

.dqz-hero__carousel .owl-dots {
  text-align: center;
  margin-top: 16px;
}

.dqz-hero__carousel .owl-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  margin: 0 5px;
  transition: var(--transition);
}

.dqz-hero__carousel .owl-dot.active {
  background: #fff;
  transform: scale(1.2);
}

/*===== Stats Bar =====*/
.dqz-stats {
  background: #fff;
  padding: 50px 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  z-index: 10;
}

.dqz-stat-item {
  text-align: center;
  padding: 20px;
}

.dqz-stat-number {
  font-size: 42px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}

.dqz-stat-label {
  font-size: 14px;
  color: var(--text-light);
  font-weight: 500;
}

/*===== Core Steps =====*/
.dqz-step-card {
  text-align: center;
  padding: 40px 24px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  height: 100%;
}

.dqz-step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-hover-shadow);
}

.dqz-step-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(0,102,255,0.2);
}

.dqz-step-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.dqz-step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/*===== Task Features =====*/
.dqz-task-section {
  background: var(--bg-section);
}

.dqz-task-visual {
  text-align: center;
}

.dqz-task-visual img {
  max-width: 100%;
  border-radius: var(--radius-md);
}

.dqz-task-detail {
  padding: 40px 0 40px 40px;
}

.dqz-task-detail .dqz-section-title {
  text-align: left;
}

.dqz-task-detail .dqz-section-title::after {
  left: 0;
  transform: none;
}

.dqz-task-intro {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 30px;
  margin-top: 20px;
}

.dqz-feat-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.dqz-feat-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.dqz-feat-item:last-child {
  border-bottom: none;
}

.dqz-feat-item:hover {
  padding-left: 8px;
}

.dqz-feat-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: var(--transition);
}

.dqz-feat-item:hover .dqz-feat-icon {
  background: var(--accent);
  color: #fff;
}

.dqz-feat-label {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-main);
}

.dqz-feat-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/*===== Platform Info =====*/
.dqz-info-block {
  padding: 30px;
}

.dqz-info-block h3 {
  margin-bottom: 16px;
}

.dqz-info-block p {
  margin-bottom: 16px;
}

.dqz-info-block strong {
  color: var(--text-main);
}

.dqz-info-visual {
  text-align: center;
}

.dqz-info-visual img {
  max-width: 100%;
  border-radius: var(--radius-md);
}

/*===== Gallery =====*/
.dqz-gallery-item {
  padding: 8px;
  transition: var(--transition);
}

.dqz-gallery-item:hover {
  transform: scale(1.03);
}

.dqz-gallery-item img {
  border-radius: var(--radius-sm);
  border: 2px dashed var(--cta);
  width: 100%;
}

.dqz-gallery-carousel .owl-dots {
  text-align: center;
  margin-top: 40px;
}

.dqz-gallery-carousel .owl-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  margin: 0 5px;
  transition: var(--transition);
}

.dqz-gallery-carousel .owl-dot.active {
  background: var(--primary);
}

/*===== FAQ Section =====*/
.dqz-faq {
  background: #fff;
}

.dqz-faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.dqz-faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.dqz-faq-item:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 12px rgba(0,102,255,0.06);
}

.dqz-faq-question {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  transition: var(--transition);
  user-select: none;
}

.dqz-faq-question:hover {
  color: var(--primary);
}

.dqz-faq-question .dqz-faq-toggle {
  font-size: 20px;
  color: var(--primary);
  transition: transform 0.3s ease;
  min-width: 24px;
  text-align: center;
}

.dqz-faq-item.active .dqz-faq-toggle {
  transform: rotate(45deg);
}

.dqz-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.dqz-faq-item.active .dqz-faq-answer {
  max-height: 300px;
}

.dqz-faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/*===== Extra Features =====*/
.dqz-extra {
  background: var(--bg-section);
}

.dqz-extra-card {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  margin-bottom: 24px;
  transition: var(--transition);
}

.dqz-extra-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-hover-shadow);
}

.dqz-extra-icon {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(0,102,255,0.1), rgba(0,201,167,0.1));
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.dqz-extra-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.dqz-extra-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/*===== Trust Partners =====*/
.dqz-trust {
  background: #fff;
}

.dqz-partner-grid {
  text-align: center;
}

.dqz-partner-grid img {
  max-width: 150px;
  opacity: 0.7;
  transition: var(--transition);
  filter: grayscale(20%);
}

.dqz-partner-grid img:hover {
  opacity: 1;
  filter: grayscale(0);
  transform: scale(1.05);
}

/*===== Download CTA =====*/
.dqz-download {
  background: linear-gradient(135deg, #0052CC 0%, #0066FF 50%, #00C9A7 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.dqz-download::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.dqz-download h2 {
  color: #fff;
}

.dqz-download h2::after {
  background: rgba(255,255,255,0.5);
}

.dqz-download .dqz-section-subtitle {
  color: rgba(255,255,255,0.7);
}

.dqz-download-btns {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 40px;
  position: relative;
  z-index: 2;
}

.dqz-download-btns .dqz-btn {
  min-width: 220px;
}

/*===== Footer =====*/
.dqz-footer {
  background: var(--bg-dark);
  padding: 60px 0 0;
  color: rgba(255,255,255,0.7);
}

.dqz-footer-brand {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.dqz-footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  max-width: 400px;
  margin: 0 auto 24px;
}

.dqz-footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  list-style: none;
  padding: 0;
  margin: 0 0 30px;
}

.dqz-footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  transition: var(--transition);
}

.dqz-footer-links a:hover {
  color: var(--accent);
}

.dqz-social-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

.dqz-social-row a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 18px;
  transition: var(--transition);
}

.dqz-social-row a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.dqz-copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

.dqz-copyright a {
  color: rgba(255,255,255,0.5);
}

.dqz-copyright a:hover {
  color: var(--accent);
}

/*===== Scroll to Top =====*/
.dqz-scroll-top {
  position: fixed;
  bottom: -100px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(0,102,255,0.3);
  z-index: 999;
}

.dqz-scroll-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}

.dqz-scroll-top.visible {
  bottom: 30px;
}

/*===== Utility =====*/
.dqz-no-margin { margin: 0 !important; }
.dqz-no-padding { padding: 0 !important; }

/*===== Responsive: Tablet (<=991px) =====*/
@media screen and (max-width: 991px) {
  /* 全局字号缩小 */
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  h3 { font-size: 22px; }

  .dqz-section { padding: 60px 0; }
  .dqz-section-title { font-size: 28px; }
  .dqz-section-header { margin-bottom: 40px; }
  .dqz-section-subtitle { font-size: 15px; }

  /* 导航：汉堡菜单 */
  .dqz-mobile-toggle { display: block; }
  .dqz-nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 0 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    border-top: 1px solid var(--border-color);
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s ease, opacity 0.3s ease, padding 0.3s ease;
  }
  .dqz-nav-list.open {
    display: flex;
    max-height: 400px;
    opacity: 1;
    padding: 12px 16px;
  }
  .dqz-nav-list li a {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 16px;
  }

  /* Hero：左右两栏 */
  .dqz-hero {
    padding: 110px 0 50px;
    min-height: auto;
  }
  .dqz-hero__title { font-size: 36px; }
  .dqz-hero__tagline { font-size: 18px; }
  .dqz-hero__desc { font-size: 15px; max-width: 100%; }
  .dqz-hero__text { padding-top: 0; }
  .dqz-hero__visual { margin-top: 30px; }
  .dqz-hero__qr { display: none; }

  /* 统计栏：2x2网格 */
  .dqz-stat-item { margin-bottom: 16px; }
  .dqz-stat-number { font-size: 36px; }

  /* 步骤卡片 */
  .dqz-step-card { margin-bottom: 20px; padding: 32px 20px; }

  /* 任务功能：上下堆叠 */
  .dqz-task-visual { margin-bottom: 20px; }
  .dqz-task-detail { padding: 20px 0; }
  .dqz-task-detail .dqz-section-title { text-align: center; }
  .dqz-task-detail .dqz-section-title::after { left: 50%; transform: translateX(-50%); }

  /* 关于平台：上下堆叠 */
  .dqz-info-block { padding: 10px 0; }
  .dqz-info-visual { margin-top: 20px; }

  /* FAQ */
  .dqz-faq-list { max-width: 100%; }

  /* 特色功能卡片 */
  .dqz-extra-card { margin-bottom: 16px; padding: 24px; }

  /* 下载区域 */
  .dqz-download-btns .dqz-btn { min-width: 180px; }

  /* 页脚链接换行 */
  .dqz-footer-links {
    flex-wrap: wrap;
    gap: 12px 20px;
    justify-content: center;
  }

  /* 合作伙伴Logo缩小 */
  .dqz-partner-grid img {
    max-width: 120px;
    margin-bottom: 12px;
  }
}

/*===== Responsive: Mobile (<=767px) =====*/
@media screen and (max-width: 767px) {
  h1 { font-size: 28px; }
  h2 { font-size: 24px; }
  h3 { font-size: 20px; }
  p { font-size: 14px; }

  .dqz-section { padding: 40px 0; }
  .dqz-section-title { font-size: 24px; }
  .dqz-section-header { margin-bottom: 28px; }
  .dqz-section-subtitle { font-size: 14px; margin-top: 12px; }

  /* ===== Hero ===== */
  .dqz-hero {
    padding: 80px 0 40px;
    min-height: auto;
    display: block;
    align-items: normal;
  }
  .dqz-hero__title { font-size: 30px; margin-bottom: 6px; }
  .dqz-hero__tagline { font-size: 15px; margin-bottom: 14px; }
  .dqz-hero__desc { font-size: 14px; margin-bottom: 20px; line-height: 1.8; max-width: 100%; }

  /* Hero 按钮：垂直堆叠居中 */
  .dqz-hero__download-row {
    display: block;
  }
  .dqz-hero__actions {
    display: block;
    margin-bottom: 20px;
  }
  .dqz-hero__actions .dqz-btn {
    display: block;
    width: 280px;
    margin: 0 auto 12px;
    padding: 14px 24px;
    font-size: 15px;
    border-radius: var(--radius-md);
  }
  .dqz-hero__actions .dqz-btn--lg {
    padding: 14px 24px;
    font-size: 15px;
  }
  .dqz-hero__platforms { justify-content: center; }
  .dqz-hero__platforms li { font-size: 24px; }
  .dqz-hero__text { padding-top: 0; }
  .dqz-hero__visual { margin-top: 24px; }

  /* ===== 统计栏 2x2 ===== */
  .dqz-stats { padding: 24px 0; }
  .dqz-stat-item { padding: 12px 8px; }
  .dqz-stat-number { font-size: 28px; margin-bottom: 6px; }
  .dqz-stat-label { font-size: 12px; }

  /* ===== 步骤卡片 单列 ===== */
  .dqz-step-card { padding: 28px 20px; margin-bottom: 16px; }
  .dqz-step-icon { width: 56px; height: 56px; font-size: 24px; margin-bottom: 16px; }
  .dqz-step-name { font-size: 18px; margin-bottom: 10px; }
  .dqz-step-desc { font-size: 14px; }

  /* ===== 任务功能 单列 ===== */
  .dqz-task-detail { padding: 16px 0; }
  .dqz-task-intro { font-size: 14px; margin-top: 12px; margin-bottom: 16px; }
  .dqz-feat-item {
    flex-direction: row;
    gap: 12px;
    padding: 14px 0;
  }
  .dqz-feat-item:hover { padding-left: 0; }
  .dqz-feat-icon { width: 40px; height: 40px; min-width: 40px; font-size: 18px; }
  .dqz-feat-label { font-size: 15px; }
  .dqz-feat-text { font-size: 13px; }

  /* ===== 关于平台 单列 ===== */
  .dqz-info-block { padding: 0; }
  .dqz-info-block p { font-size: 14px; margin-bottom: 12px; }
  .dqz-info-visual { margin-top: 16px; }
  .dqz-info-visual img { max-width: 100%; }

  /* ===== FAQ ===== */
  .dqz-faq-question { padding: 14px 16px; font-size: 15px; }
  .dqz-faq-answer-inner { padding: 0 16px 14px; font-size: 13px; line-height: 1.7; }
  .dqz-faq-item { margin-bottom: 10px; }

  /* ===== 特色功能卡片 单列 ===== */
  .dqz-extra-card {
    flex-direction: row;
    padding: 20px;
    gap: 16px;
    margin-bottom: 14px;
  }
  .dqz-extra-icon { width: 44px; height: 44px; min-width: 44px; font-size: 20px; }
  .dqz-extra-title { font-size: 16px; margin-bottom: 6px; }
  .dqz-extra-desc { font-size: 13px; }

  /* ===== 应用截图 ===== */
  .dqz-gallery-item { padding: 6px; }

  /* ===== 下载区域 ===== */
  .dqz-download { padding: 40px 0; }
  .dqz-download-btns {
    display: block;
    margin-top: 24px;
  }
  .dqz-download-btns .dqz-btn {
    display: block;
    width: 280px;
    margin: 0 auto 12px;
    padding: 14px 24px;
    font-size: 15px;
  }

  /* ===== 合作伙伴 ===== */
  .dqz-partner-grid img {
    max-width: 100px;
    margin-bottom: 10px;
  }
  .dqz-partner-grid li {
    display: inline-block;
    padding: 6px;
  }

  /* ===== 页脚 ===== */
  .dqz-footer { padding: 36px 0 0; }
  .dqz-footer-brand { font-size: 24px; margin-bottom: 10px; }
  .dqz-footer-desc { font-size: 13px; margin-bottom: 16px; max-width: 100%; }
  .dqz-footer-links {
    flex-wrap: wrap;
    gap: 8px 16px;
    justify-content: center;
    margin-bottom: 20px;
  }
  .dqz-footer-links a { font-size: 13px; }
  .dqz-social-row { gap: 10px; margin-bottom: 24px; }
  .dqz-social-row a { width: 36px; height: 36px; font-size: 16px; }
  .dqz-copyright { padding: 14px 0; font-size: 12px; }

  /* ===== 返回顶部 ===== */
  .dqz-scroll-top { width: 38px; height: 38px; font-size: 16px; right: 16px; }
  .dqz-scroll-top.visible { bottom: 16px; }

  /* ===== 按钮触摸目标 ===== */
  .dqz-btn { min-height: 44px; }
}

/*===== Responsive: Small Mobile (<=575px) =====*/
@media screen and (max-width: 575px) {
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }
  h3 { font-size: 18px; }
  p { font-size: 14px; }

  .dqz-section { padding: 32px 0; }
  .dqz-section-title { font-size: 22px; }
  .dqz-section-header { margin-bottom: 24px; }
  .dqz-section-subtitle { font-size: 13px; }

  /* Hero */
  .dqz-hero { padding: 70px 0 30px; }
  .dqz-hero__title { font-size: 26px; }
  .dqz-hero__tagline { font-size: 14px; }
  .dqz-hero__desc { font-size: 13px; margin-bottom: 16px; }
  .dqz-hero__actions .dqz-btn { display: block; width: 260px; margin: 0 auto 12px; padding: 12px 20px; font-size: 14px; }
  .dqz-hero__actions .dqz-btn--lg { padding: 12px 20px; font-size: 14px; }

  /* 统计栏 */
  .dqz-stat-number { font-size: 24px; }
  .dqz-stat-label { font-size: 11px; }

  /* 步骤卡片 */
  .dqz-step-card { padding: 24px 16px; }
  .dqz-step-icon { width: 48px; height: 48px; font-size: 20px; }
  .dqz-step-name { font-size: 17px; }

  /* 任务功能 */
  .dqz-feat-item { gap: 10px; padding: 12px 0; }
  .dqz-feat-icon { width: 36px; height: 36px; min-width: 36px; font-size: 16px; }
  .dqz-feat-label { font-size: 14px; }
  .dqz-feat-text { font-size: 12px; }

  /* FAQ */
  .dqz-faq-question { padding: 12px 14px; font-size: 14px; }
  .dqz-faq-answer-inner { padding: 0 14px 12px; font-size: 12px; }

  /* 特色功能 */
  .dqz-extra-card { padding: 16px; gap: 12px; }
  .dqz-extra-icon { width: 40px; height: 40px; min-width: 40px; font-size: 18px; }
  .dqz-extra-title { font-size: 15px; }
  .dqz-extra-desc { font-size: 12px; }

  /* 下载按钮 */
  .dqz-download-btns .dqz-btn { display: block; width: 260px; margin: 0 auto 12px; padding: 12px 20px; font-size: 14px; }

  /* 合作伙伴Logo更小 */
  .dqz-partner-grid img { max-width: 80px; }

  /* 导航品牌名缩小 */
  .dqz-brand { font-size: 18px; }
  .dqz-brand img { width: 30px; height: 30px; }

  /* 页脚 */
  .dqz-footer-links { gap: 6px 12px; }
  .dqz-footer-links a { font-size: 12px; }
}

/*===== Responsive: Extra Small (<=375px) =====*/
@media screen and (max-width: 375px) {
  h1 { font-size: 24px; }
  h2 { font-size: 20px; }

  .dqz-section { padding: 28px 0; }
  .dqz-section-title { font-size: 20px; }
  .dqz-section-header { margin-bottom: 20px; }

  /* Hero */
  .dqz-hero { padding: 64px 0 24px; }
  .dqz-hero__title { font-size: 24px; }
  .dqz-hero__tagline { font-size: 13px; }
  .dqz-hero__desc { font-size: 13px; }
  .dqz-hero__actions .dqz-btn { display: block; width: 240px; margin: 0 auto 10px; padding: 11px 16px; font-size: 13px; }
  .dqz-hero__actions .dqz-btn--lg { padding: 11px 16px; font-size: 13px; }

  /* 统计栏 */
  .dqz-stat-number { font-size: 22px; }

  /* 步骤卡片 */
  .dqz-step-card { padding: 20px 14px; }
  .dqz-step-icon { width: 44px; height: 44px; font-size: 18px; }

  /* 下载按钮 */
  .dqz-download-btns .dqz-btn { display: block; width: 240px; margin: 0 auto 10px; padding: 11px 16px; font-size: 13px; }

  /* 页脚 */
  .dqz-footer-brand { font-size: 20px; }
  .dqz-copyright { font-size: 11px; }
}

/*===== iOS Safe Area =====*/
@supports (padding: env(safe-area-inset-bottom)) {
  .dqz-topbar {
    padding-top: env(safe-area-inset-top);
  }
  .dqz-footer {
    padding-bottom: env(safe-area-inset-bottom);
  }
  .dqz-scroll-top {
    bottom: calc(16px + env(safe-area-inset-bottom));
  }
}

/*===== Touch Device Optimizations =====*/
@media (hover: none) and (pointer: coarse) {
  .dqz-btn:hover { transform: none; box-shadow: none; }
  .dqz-btn--primary:hover { background: var(--cta); border-color: var(--cta); }
  .dqz-btn--solid:hover { background: var(--primary); border-color: var(--primary); }
  .dqz-step-card:hover { transform: none; }
  .dqz-extra-card:hover { transform: none; }
  .dqz-feat-item:hover { padding-left: 0; }
  .dqz-gallery-item:hover { transform: none; }
  /* 增大触摸目标 */
  .dqz-faq-question { min-height: 48px; }
  .dqz-nav-list li a { min-height: 48px; }
  .dqz-mobile-toggle { min-width: 44px; min-height: 44px; display: flex; align-items: center; justify-content: center; }
}