/* 基础重置 */
.z21db5body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', 'Arial', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #f7f8fa;
    color: #222;
}

.z21db5container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Flex布局 */
.z21db5flex {
    display: flex;
}
.z21db5flex-wrap {
    flex-wrap: wrap;
}
.z21db5justify-between {
    justify-content: space-between;
}
.z21db5align-center {
    align-items: center;
}
.z21db5gap {
    gap: 24px;
}

/* Header */
.z21db5header {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    padding: 0.2em 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.z21db5logo {
    font-size: 1.8em;
    font-weight: bold;
    color: #25d366;
}

/* 导航 */
.z21db5nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1.5em;
}
.z21db5nav-link {
    text-decoration: none;
    color: #222;
    font-weight: 500;
    transition: color 0.2s;
}
.z21db5nav-link:hover {
    color: #25d366;
}

/* 主体 */
.z21db5main {
    margin-top: 0.2em;
}

/* Hero区 */
.z21db5hero {
    background: linear-gradient(90deg, #25d366 0%, #128c7e 100%);
    color: #fff;
    padding: 1.2em 0 2em 0;
    text-align: center;
}
.z21db5title {
    font-size: 2.5em;
    margin-bottom: 0.5em;
}
.z21db5subtitle {
    font-size: 1.2em;
    margin-bottom: 1.5em;
}

/* 按钮 */
.z21db5btn {
    display: inline-block;
    padding: 0.7em 2em;
    border-radius: 30px;
    font-size: 1em;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: background 0.2s, color 0.2s;
    margin: 0.5em 0;
}
.z21db5btn-primary {
    background: #25d366;
    color: #fff;
}
.z21db5btn-primary:hover {
    background: #128c7e;
}
.z21db5btn-secondary {
    background: #fff;
    color: #25d366;
    border: 2px solid #25d366;
}
.z21db5btn-secondary:hover {
    background: #25d366;
    color: #fff;
}

/* Section区块 */
.z21db5section {
    padding: 2.5em 0;
}
.z21db5bg-light {
    background: #f0f4f8;
}
.z21db5section-title {
    font-size: 2em;
    margin-bottom: 1em;
    color: #128c7e;
    text-align: center;
}
.z21db5text {
    font-size: 1.1em;
    line-height: 1.7;
    margin-bottom: 1em;
    text-align: center;
}

/* 卡片 */
.z21db5card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    padding: 1.5em;
    flex: 1 1 220px;
    min-width: 220px;
    max-width: 300px;
    margin: 0.5em auto;
    text-align: center;
}
.z21db5card-title {
    font-size: 1.3em;
    color: #25d366;
    margin-bottom: 0.5em;
}

/* 表单 */
.z21db5form {
    max-width: 500px;
    margin: 0 auto;
    background: #fff;
    padding: 2em 1.5em;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.z21db5form-group {
    margin-bottom: 1.2em;
}
.z21db5label {
    display: block;
    margin-bottom: 0.5em;
    font-weight: 500;
    color: #128c7e;
}
.z21db5input, .z21db5textarea {
    width: 100%;
    padding: 0.7em;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1em;
    box-sizing: border-box;
}
.z21db5textarea {
    min-height: 80px;
    resize: vertical;
}

/* Footer */
.z21db5footer {
    background: #222;
    color: #fff;
    text-align: center;
    padding: 1.2em 0;
    margin-top: 2em;
}
.z21db5footer-text {
    font-size: 1em;
}

/* 优势与亮点卡片已复用z21db5card，无需重复 */

/* 教程列表 */
.z21db5tutorial-list {
    margin: 0 auto 1.5em auto;
    padding: 0 1em;
    max-width: 600px;
    list-style: decimal inside;
    font-size: 1.1em;
    color: #128c7e;
    background: #f8fafc;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}
.z21db5tutorial-step {
    margin: 0.7em 0;
    line-height: 1.7;
}

/* FAQ */
.z21db5faq-list {
    max-width: 700px;
    margin: 0 auto;
}
.z21db5faq-item {
    background: #f7f8fa;
    border-left: 4px solid #25d366;
    margin-bottom: 1em;
    padding: 1em 1.2em;
    border-radius: 6px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}
.z21db5faq-question {
    font-size: 1.1em;
    color: #128c7e;
    margin: 0 0 0.3em 0;
}
.z21db5faq-answer {
    margin: 0;
    color: #333;
    font-size: 1em;
}

/* 用户评价 */
.z21db5review-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 1.2em 1em;
    flex: 1 1 220px;
    min-width: 220px;
    max-width: 320px;
    margin: 0.5em auto;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.z21db5review-text {
    font-size: 1.05em;
    color: #222;
    margin-bottom: 0.7em;
}
.z21db5review-user {
    font-size: 0.95em;
    color: #128c7e;
    text-align: right;
}

/* 服务承诺 */
.z21db5promise-list {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 1em;
    list-style: disc inside;
    background: #f8fafc;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}
.z21db5promise-item {
    font-size: 1.1em;
    color: #25d366;
    margin: 0.7em 0;
    line-height: 1.7;
}

/* 横幅区域图片布局 */
.z21db5hero-flex {
    align-items: center;
    justify-content: space-between;
}
.z21db5hero-content {
    flex: 1 1 350px;
    min-width: 220px;
}
.z21db5hero-image-wrap {
    flex: 1 1 320px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    min-width: 180px;
    max-width: 420px;
}
.z21db5hero-image {
    max-width: 100%;
    max-height: 220px;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    background: #fff;
}
@media (max-width: 900px) {
    .z21db5hero-flex {
        flex-direction: column;
        align-items: center;
        gap: 1.5em;
    }
    .z21db5hero-image-wrap {
        justify-content: center;
        max-width: 100%;
    }
    .z21db5hero-image {
        max-height: 160px;
    }
}
@media (max-width: 600px) {
    .z21db5hero {
        padding: 1.2em 0 0.7em 0;
    }
    .z21db5hero-image {
        max-height: 110px;
    }
}
@media (max-width: 400px) {
    .z21db5hero {
        padding: 0.8em 0 0.3em 0;
    }
}

/* WhatsApp官网介绍卡片式布局 - 独特样式 */
.z21db5whatsapp-intro-cards {
    margin-top: 1.2em;
    gap: 1.2em;
}
.z21db5intro-card {
    background: #e9f9f1;
    border-radius: 14px;
    border: 2px solid #25d366;
    box-shadow: 0 2px 8px rgba(37,211,102,0.06);
    padding: 1.1em 1em 1em 1em;
    flex: 1 1 220px;
    min-width: 200px;
    max-width: 320px;
    margin: 0.3em auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    position: relative;
    transition: box-shadow 0.2s, border-color 0.2s;
}
.z21db5intro-card:hover {
    box-shadow: 0 6px 20px rgba(37,211,102,0.13);
    border-color: #128c7e;
}
.z21db5intro-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #25d366;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5em;
    position: absolute;
    top: -19px;
    left: 1em;
    box-shadow: 0 2px 8px rgba(37,211,102,0.13);
}
.z21db5intro-title {
    font-size: 1.22em;
    color: #128c7e;
    font-weight: 700;
    margin: 1.2em 0 0.4em 0;
    letter-spacing: 0.5px;
}
.z21db5intro-text {
    font-size: 0.98em;
    color: #222;
    line-height: 1.6;
    margin: 0;
}
@media (max-width: 900px) {
    .z21db5intro-card {
        min-width: 95%;
        max-width: 100%;
        padding: 1em 0.7em 0.9em 0.7em;
    }
}
@media (max-width: 600px) {
    .z21db5intro-card {
        padding: 0.8em 0.3em 0.8em 0.3em;
    }
    .z21db5whatsapp-intro-cards {
        gap: 0.5em;
    }
}

/* WhatsApp官网介绍新版样式 */
.z21db5intro-main {
    margin-bottom: 1.2em;
    text-align: center;
}
.z21db5intro-maintext {
    font-size: 1.13em;
    color: #128c7e;
    line-height: 1.9;
    font-weight: 500;
    margin: 0 auto;
    max-width: 800px;
}
.z21db5intro-highlights {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.2em 2.5em;
    margin-top: 0.5em;
}
.z21db5intro-highlight {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 120px;
    max-width: 170px;
    margin: 0.2em 0;
}
.z21db5intro-highlight-icon {
    font-size: 2em;
    margin-bottom: 0.3em;
    color: #25d366;
}
.z21db5intro-highlight-title {
    font-size: 1.08em;
    font-weight: 700;
    color: #128c7e;
    margin-bottom: 0.2em;
    letter-spacing: 0.5px;
}
.z21db5intro-highlight-desc {
    font-size: 0.98em;
    color: #333;
    text-align: center;
    line-height: 1.5;
}
@media (max-width: 900px) {
    .z21db5intro-highlights {
        gap: 1.2em 1.2em;
    }
    .z21db5intro-highlight {
        min-width: 110px;
        max-width: 48%;
    }
}
@media (max-width: 600px) {
    .z21db5intro-maintext {
        font-size: 1em;
        padding: 0 0.2em;
    }
    .z21db5intro-highlights {
        gap: 0.7em 0.7em;
    }
    .z21db5intro-highlight {
        min-width: 90px;
        max-width: 100%;
    }
    .z21db5intro-highlight-icon {
        font-size: 1.5em;
    }
}

/* WhatsApp官网介绍板块整体框架增强 */
.z21db5section#whatsapp {
    background: #e6f7ef;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(37,211,102,0.08);
    border: 1.5px solid #b2e9d2;
    margin-top: 2em;
    margin-bottom: 2em;
    padding-top: 2.2em;
    padding-bottom: 2.2em;
}
.z21db5intro-main {
    margin-bottom: 1.2em;
    text-align: center;
    background: rgba(255,255,255,0.85);
    border-left: 5px solid #25d366;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(37,211,102,0.06);
    padding: 1.1em 1.2em 1em 1.2em;
    display: inline-block;
    max-width: 900px;
}
.z21db5intro-maintext {
    font-size: 1.13em;
    color: #128c7e;
    line-height: 1.9;
    font-weight: 500;
    margin: 0 auto;
    max-width: 800px;
    background: none;
    border: none;
    box-shadow: none;
}
.z21db5intro-highlights {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.2em 2.5em;
    margin-top: 0.5em;
    border-top: 1.5px dashed #b2e9d2;
    padding-top: 1.2em;
}
.z21db5intro-highlight {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 120px;
    max-width: 170px;
    margin: 0.2em 0;
    padding: 0.5em 0.2em;
}
@media (max-width: 900px) {
    .z21db5section#whatsapp {
        padding-top: 1.2em;
        padding-bottom: 1.2em;
    }
    .z21db5intro-main {
        padding: 0.8em 0.5em 0.7em 0.7em;
    }
    .z21db5intro-highlights {
        gap: 1.2em 1.2em;
        padding-top: 0.7em;
    }
    .z21db5intro-highlight {
        min-width: 110px;
        max-width: 48%;
    }
}
@media (max-width: 600px) {
    .z21db5section#whatsapp {
        margin-top: 1em;
        margin-bottom: 1em;
        border-radius: 10px;
    }
    .z21db5intro-main {
        padding: 0.5em 0.2em 0.5em 0.4em;
    }
    .z21db5intro-maintext {
        font-size: 1em;
        padding: 0 0.2em;
    }
    .z21db5intro-highlights {
        gap: 0.7em 0.7em;
        padding-top: 0.4em;
    }
    .z21db5intro-highlight {
        min-width: 90px;
        max-width: 100%;
        padding: 0.2em 0;
    }
}

/* 响应式优化 */
@media (max-width: 900px) {
    .z21db5flex {
        flex-direction: column;
        gap: 1em;
    }
    .z21db5nav-list {
        flex-direction: column;
        gap: 0.8em;
    }
    .z21db5hero {
        padding: 2em 0 1.2em 0;
    }
    .z21db5review-card {
        min-width: 90%;
        max-width: 100%;
    }
}
@media (max-width: 600px) {
    .z21db5container {
        width: 100%;
        padding: 0 1px;
    }
    .z21db5title {
        font-size: 1.1em;
    }
    .z21db5section-title {
        font-size: 1em;
        margin-bottom: 0.7em;
    }
    .z21db5btn, .download-btn, .webapp-btn, .contact-info-btn {
        font-size: 0.95em;
        padding: 0.5em 1.2em;
        border-radius: 18px;
    }
    .download-card, .webapp-card-frame, .tutorial-step-card, .advantage-card, .contact-info-frame {
        padding: 8px 2px 8px 2px;
        border-radius: 6px;
    }
    .download-card-title, .webapp-card-title, .tutorial-step-title, .advantage-card-title {
        font-size: 1em;
    }
    .download-card-desc, .webapp-card-desc, .tutorial-step-desc, .advantage-card-desc {
        font-size: 0.92em;
    }
    .download-card-icon, .webapp-card-icon, .advantage-card-icon {
        font-size: 1.3em;
    }
    .download-card {
        width: 98vw;
        min-width: 0;
        max-width: 99vw;
    }
    .webapp-card-frame {
        max-width: 99vw;
        gap: 8px;
        padding: 8px 2px;
    }
    .tutorial-step-card {
        width: 98vw;
        min-width: 0;
        max-width: 99vw;
        gap: 6px;
    }
    .tutorial-step-icon, .tutorial-step-circle {
        width: 1.5em;
        height: 1.5em;
        font-size: 1em;
        margin-right: 6px;
        margin-bottom: 0;
    }
    .tutorial-step-title {
        font-size: 0.98em;
    }
    .tutorial-step-desc {
        font-size: 0.9em;
    }
    .z21db5nav-list {
        gap: 0.4em;
    }
    .z21db5nav-link {
        font-size: 0.98em;
    }
}
@media (max-width: 400px) {
    .z21db5title, .z21db5section-title {
        font-size: 0.9em;
    }
    .z21db5btn, .download-btn, .webapp-btn, .contact-info-btn {
        font-size: 0.85em;
        padding: 0.4em 0.7em;
        border-radius: 12px;
    }
    .download-card, .webapp-card-frame, .tutorial-step-card, .advantage-card, .contact-info-frame {
        padding: 4px 1px 4px 1px;
        border-radius: 4px;
    }
    .download-card-title, .webapp-card-title, .tutorial-step-title, .advantage-card-title {
        font-size: 0.92em;
    }
    .download-card-desc, .webapp-card-desc, .tutorial-step-desc, .advantage-card-desc {
        font-size: 0.85em;
    }
    .download-card-icon, .webapp-card-icon, .advantage-card-icon {
        font-size: 1em;
    }
    .tutorial-step-icon, .tutorial-step-circle {
        width: 1.1em;
        height: 1.1em;
        font-size: 0.8em;
        margin-right: 4px;
        margin-bottom: 0;
    }
    .z21db5nav-link {
        font-size: 0.85em;
    }
} 

.whatsapp-intro {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 900px;
  margin: 60px auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  padding: 40px 32px;
  gap: 48px;
}

.intro-text {
  flex: 1;
  min-width: 240px;
}

.intro-text h1 {
  font-size: 2.5em;
  color: #25d366;
  margin-bottom: 16px;
}

.intro-text p {
  font-size: 1.2em;
  color: #333;
}

.intro-image {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.intro-image img {
  max-width: 320px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.10);
} 

.whatsapp-intro-image-alone {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin: 32px 0 0 0;
}
.whatsapp-intro-image-alone img {
  max-width: 340px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.10);
  background: #fff;
  padding: 8px;
} 

.whatsapp-intro-flex {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin: 32px 0 0 0;
}
.whatsapp-intro-flex .z21db5intro-main {
  flex: 1;
  min-width: 240px;
}
.whatsapp-intro-flex .whatsapp-intro-image-alone {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
}
.whatsapp-intro-flex .whatsapp-intro-image-alone img {
  max-width: 340px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.10);
  background: #fff;
  padding: 8px;
}
@media (max-width: 900px) {
  .whatsapp-intro-flex {
    flex-direction: column;
    gap: 24px;
  }
  .whatsapp-intro-flex .whatsapp-intro-image-alone img {
    max-width: 90vw;
  }
} 

.download-subtitle {
  text-align: center;
  color: #25d366;
  font-size: 1.15em;
  margin-bottom: 28px;
}
.download-card-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.download-card {
  background: #f6fffa;
  border-radius: 8px;
  /* box-shadow: 0 4px 24px rgba(0,0,0,0.08); */
  box-shadow: 0 2px 8px rgba(37,211,102,0.04);
  padding: 22px 14px 16px 14px;
  width: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.18s, box-shadow 0.18s;
  position: relative;
}
.download-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 4px 16px rgba(37,211,102,0.08);
}
.download-card-icon {
  font-size: 2.5em;
  margin-bottom: 10px;
}
.download-card-title {
  font-size: 1.13em;
  color: #199e5b;
  margin-bottom: 6px;
  font-weight: bold;
}
.download-card-desc {
  color: #222;
  font-size: 0.98em;
  margin-bottom: 10px;
  text-align: center;
}
.download-card-features {
  list-style: none;
  padding: 0;
  margin: 0 0 16px 0;
  width: 100%;
}
.download-card-features li {
  font-size: 0.95em;
  color: #3a3a3a;
  margin-bottom: 2px;
  padding-left: 1em;
  position: relative;
}
.download-card-features li:before {
  content: '•';
  color: #25d366;
  position: absolute;
  left: 0;
}
.download-btn {
  display: inline-block;
  background: #25d366;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 22px;
  font-size: 1em;
  font-weight: bold;
  text-decoration: none;
  margin-top: 4px;
  transition: background 0.18s;
  box-shadow: 0 1px 4px rgba(37,211,102,0.06);
}
.download-btn:hover {
  background: #1fa855;
}
@media (max-width: 1100px) {
  .download-card {
    width: 44vw;
    min-width: 180px;
    max-width: 300px;
    padding: 16px 8px 12px 8px;
  }
}
@media (max-width: 700px) {
  .download-card {
    width: 92vw;
    min-width: 0;
    max-width: 99vw;
    padding: 14px 4px 10px 4px;
  }
} 

.webapp-card-frame {
  display: flex;
  align-items: flex-start;
  background: #f6fffa;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(37,211,102,0.04);
  padding: 28px 32px;
  gap: 32px;
  margin: 0 auto 18px auto;
  max-width: 800px;
  flex-wrap: wrap;
}
.webapp-card-icon {
  font-size: 3.2em;
  color: #25d366;
  flex: 0 0 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 0;
}
.webapp-card-content {
  flex: 1;
  min-width: 220px;
}
.webapp-card-title {
  font-size: 1.25em;
  color: #199e5b;
  margin-bottom: 8px;
  font-weight: bold;
}
.webapp-card-desc {
  color: #222;
  font-size: 1em;
  margin-bottom: 12px;
}
.webapp-card-features {
  list-style: none;
  padding: 0;
  margin: 0 0 16px 0;
}
.webapp-card-features li {
  font-size: 0.97em;
  color: #3a3a3a;
  margin-bottom: 3px;
  padding-left: 1em;
  position: relative;
}
.webapp-card-features li:before {
  content: '•';
  color: #25d366;
  position: absolute;
  left: 0;
}
.webapp-btn {
  display: inline-block;
  background: #25d366;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 22px;
  font-size: 1em;
  font-weight: bold;
  text-decoration: none;
  margin-top: 4px;
  transition: background 0.18s;
  box-shadow: 0 1px 4px rgba(37,211,102,0.06);
}
.webapp-btn:hover {
  background: #1fa855;
}
@media (max-width: 900px) {
  .webapp-card-frame {
    flex-direction: column;
    align-items: center;
    padding: 18px 8px;
    gap: 18px;
  }
  .webapp-card-icon {
    font-size: 2.2em;
    margin-bottom: 0;
  }
} 

.advantage-card-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
  margin-top: 18px;
}
.advantage-card {
  background: #f6fffa;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(37,211,102,0.04);
  padding: 22px 16px 16px 16px;
  width: 220px;
  min-width: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.18s, box-shadow 0.18s;
  position: relative;
}
.advantage-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 4px 16px rgba(37,211,102,0.08);
}
.advantage-card-icon {
  font-size: 2.2em;
  color: #25d366;
  margin-bottom: 8px;
}
.advantage-card-title {
  font-size: 1.08em;
  color: #199e5b;
  margin-bottom: 6px;
  font-weight: bold;
  text-align: center;
}
.advantage-card-desc {
  color: #222;
  font-size: 0.97em;
  text-align: center;
  margin-bottom: 0;
}
@media (max-width: 900px) {
  .advantage-card {
    width: 44vw;
    min-width: 120px;
    max-width: 300px;
    padding: 14px 6px 10px 6px;
  }
}
@media (max-width: 700px) {
  .advantage-card-grid {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .advantage-card {
    width: 92vw;
    min-width: 0;
    max-width: 99vw;
    padding: 10px 2px 8px 2px;
  }
} 

.advantage-simple-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  margin: 24px 0 0 0;
}
.advantage-simple-item {
  display: flex;
  align-items: center;
  min-width: 180px;
  max-width: 260px;
  gap: 12px;
  padding: 0 8px;
}
.advantage-simple-icon {
  font-size: 2.1em;
  color: #25d366;
  flex-shrink: 0;
}
.advantage-simple-content {
  display: flex;
  flex-direction: column;
}
.advantage-simple-title {
  font-size: 1.08em;
  color: #199e5b;
  font-weight: bold;
  margin-bottom: 2px;
}
.advantage-simple-desc {
  font-size: 0.97em;
  color: #333;
  white-space: nowrap;
}
@media (max-width: 900px) {
  .advantage-simple-list {
    gap: 18px;
  }
  .advantage-simple-item {
    min-width: 120px;
    max-width: 99vw;
    padding: 0 2px;
  }
}
@media (max-width: 700px) {
  .advantage-simple-list {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .advantage-simple-item {
    width: 92vw;
    min-width: 0;
    max-width: 99vw;
    justify-content: flex-start;
  }
} 

.tutorial-step-card-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
  margin-top: 18px;
}
.tutorial-step-card {
  background: #f6fffa;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(37,211,102,0.04);
  padding: 20px 16px 16px 16px;
  width: 220px;
  min-width: 140px;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 12px;
  transition: transform 0.18s, box-shadow 0.18s;
  position: relative;
}
.tutorial-step-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 4px 16px rgba(37,211,102,0.08);
}
.tutorial-step-icon {
  font-size: 1.5em;
  color: #fff;
  background: #25d366;
  border-radius: 50%;
  width: 2.2em;
  height: 2.2em;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 2px;
  box-shadow: 0 1px 4px rgba(37,211,102,0.10);
}
.tutorial-step-content {
  display: flex;
  flex-direction: column;
  flex: 1;
}
.tutorial-step-title {
  font-size: 1.08em;
  color: #199e5b;
  font-weight: bold;
  margin-bottom: 2px;
  line-height: 1.2;
}
.tutorial-step-desc {
  color: #333;
  font-size: 0.97em;
  margin-bottom: 0;
  line-height: 1.5;
}
@media (max-width: 900px) {
  .tutorial-step-card {
    width: 44vw;
    min-width: 100px;
    max-width: 300px;
    padding: 14px 6px 10px 6px;
  }
}
@media (max-width: 700px) {
  .tutorial-step-card-grid {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .tutorial-step-card {
    width: 92vw;
    min-width: 0;
    max-width: 99vw;
    padding: 10px 2px 8px 2px;
  }
} 

.tutorial-steps-bar {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin: 32px 0 0 0;
  flex-wrap: wrap;
}
.tutorial-step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  flex: 1 1 120px;
  min-width: 120px;
  max-width: 180px;
  padding: 0 8px;
}
.tutorial-step-circle {
  width: 2.2em;
  height: 2.2em;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25em;
  font-weight: bold;
  margin-bottom: 8px;
  z-index: 1;
  box-shadow: 0 1px 4px rgba(37,211,102,0.10);
}
.tutorial-step-item:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 1.1em;
  left: 50%;
  width: calc(100% + 8px);
  height: 4px;
  background: linear-gradient(90deg, #25d366 60%, #eafff3 100%);
  z-index: 0;
  transform: translateX(50%);
}
.tutorial-step-info {
  text-align: center;
  margin-top: 2px;
}
.tutorial-step-title {
  color: #199e5b;
  font-weight: bold;
  font-size: 1.05em;
  margin-bottom: 2px;
}
.tutorial-step-desc {
  color: #333;
  font-size: 0.97em;
  line-height: 1.4;
}
@media (max-width: 900px) {
  .tutorial-steps-bar {
    flex-wrap: wrap;
    gap: 0;
  }
  .tutorial-step-item {
    min-width: 90px;
    max-width: 140px;
    padding: 0 2px;
  }
}
@media (max-width: 700px) {
  .tutorial-steps-bar {
    flex-direction: column;
    align-items: center;
    gap: 0;
  }
  .tutorial-step-item {
    flex-direction: row;
    align-items: flex-start;
    min-width: 0;
    max-width: 99vw;
    padding: 0 0 18px 0;
  }
  .tutorial-step-circle {
    margin-bottom: 0;
    margin-right: 12px;
  }
  .tutorial-step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 1.1em;
    top: 2.2em;
    width: 4px;
    height: calc(100% + 8px);
    background: linear-gradient(180deg, #25d366 60%, #eafff3 100%);
    z-index: 0;
    transform: translateY(0);
  }
  .tutorial-step-info {
    text-align: left;
    margin-top: 0;
  }
} 

.contact-info-frame {
  background: #f6fffa;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(37,211,102,0.04);
  padding: 28px 32px;
  max-width: 520px;
  margin: 24px auto 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.08em;
}
.contact-info-label {
  color: #199e5b;
  font-weight: bold;
  min-width: 90px;
}
.contact-info-value {
  color: #333;
}
.contact-info-btn {
  display: inline-block;
  background: #25d366;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 18px;
  font-size: 1em;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.18s;
  box-shadow: 0 1px 4px rgba(37,211,102,0.06);
}
.contact-info-btn:hover {
  background: #1fa855;
}
@media (max-width: 700px) {
  .contact-info-frame {
    padding: 16px 6px;
    max-width: 99vw;
  }
  .contact-info-item {
    font-size: 1em;
  }
} 

@media (max-width: 600px) {
  .z21db5hero {
    padding: 0.7em 0 0.05em 0 !important;
    min-height: unset !important;
    height: auto !important;
  }
  .z21db5hero-content {
    margin-bottom: 0 !important;
    padding-bottom: 0 !important;
  }
  .z21db5main {
    margin-top: 0.1em !important;
    min-height: unset !important;
  }
  .z21db5section {
    padding-top: 0.7em !important;
    padding-bottom: 0.5em !important;
  }
  .z21db5footer {
    margin-top: 0.2em !important;
  }
  .z21db5hero-content {
    margin-left: auto !important;
    margin-right: auto !important;
    text-align: center !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
}
@media (max-width: 400px) {
  .z21db5hero {
    padding: 0.3em 0 0.01em 0 !important;
  }
  .z21db5section {
    padding-top: 0.3em !important;
    padding-bottom: 0.2em !important;
  }
} 

@media (max-width: 700px) {
  .z21db5nav-list {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0.4em;
    padding-bottom: 0.1em;
    margin-top: 0.1em;
    scrollbar-width: none;
  }
  .z21db5nav-list::-webkit-scrollbar {
    display: none;
  }
  .z21db5nav-link {
    font-size: 0.92em;
    padding: 0.15em 0.5em;
    border: none;
    background: none;
    color: #199e5b;
    text-decoration: none;
    border-radius: 0;
    transition: color 0.18s;
    white-space: nowrap;
    margin: 0;
  }
  .z21db5nav-link:hover,
  .z21db5nav-link:active {
    color: #128c7e;
    background: none;
    text-decoration: none;
  }
  .z21db5nav {
    margin-top: 0.1em;
    margin-bottom: 0;
  }
  .z21db5header {
    padding-bottom: 0.1em;
  }
}