* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background: whitesmoke;
    color: #1d1d1f;
    line-height: 1.4;
    padding-bottom: 100px;
    min-height: 100vh;
}


/* 导航栏（电脑端：顶部） */
.main-nav {
    position: fixed;
    z-index: 1000;
    width: 92%;
    max-width: 860px;
    height: 46px;
    background: linear-gradient(45deg,rgba(255,255,255,0.8)0%,
            transparent 25%,transparent 75%,
            rgba(255,255,255,0.8)100%);
    backdrop-filter: blur(32px) saturate(180%);
    -webkit-backdrop-filter: blur(32px) saturate(180%);
    border-radius: 22px;
    border: 1px double rgba(51, 51, 51, 0.08);
    box-shadow:
       inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
       inset -2px 2px 1px -1px rgba(255, 255, 255, 0.9),
       inset 6px -6px 1px -6px rgba(255, 255, 255, 0.55),
       inset -6px 6px 1px -6px rgba(255, 255, 255, 0.55),
       inset 0 0 2px rgba(0,0, 0, 0.9),
       0 4px 8px rgba(0,0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
}

.nav-container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.apple-logo {
    font-size: 20px;
}
.nav-links {
    display: flex;
    list-style: none;
    position: relative;
}
.nav-links li {
    margin: 0 8px;
    position: relative;
}
.nav-links a {
    color: #1d1d1f;
    text-decoration: none;
    font-size: 12px;
    padding: 8px 6px;
    position: relative;
    z-index: 1;
}

.liquid-glass {
    position: absolute;
    height: 26px;
    width: 40px !important;
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border-radius: 99px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(45deg,rgba(255,255,255,0.8)0%,
            transparent 25%,transparent 75%,
            rgba(255,255,255,0.8)100%);
    border: 1px double rgba(51, 51, 51, 0.08);
    box-shadow:
        inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
        inset -2px 2px 1px -1px rgba(255, 255, 255, 0.9),
        inset 6px -6px 1px -6px rgba(255, 255, 255, 0.55),
        inset -6px 6px 1px -6px rgba(255, 255, 255, 0.55),
        inset 0 0 2px rgba(0,0, 0, 0.9),
        0 4px 8px rgba(0,0, 0, 0.2);
}

.submenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 8px;
    padding: 12px 0;
    width: 180px;
    list-style: none;
    border-radius: 18px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(28px) saturate(200%);
    -webkit-backdrop-filter: blur(28px) saturate(200%);
    z-index: 9999;
    background: linear-gradient(45deg,rgba(255,255,255,0.8)0%,
            transparent 25%,transparent 75%,
            rgba(255,255,255,0.8)100%);
    border: 1px double rgba(51, 51, 51, 0.08);
    box-shadow:
        inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
        inset -2px 2px 1px -1px rgba(255, 255, 255, 0.9),
        inset 6px -6px 1px -6px rgba(255, 255, 255, 0.55),
        inset -6px 6px 1px -6px rgba(255, 255, 255, 0.55),
        inset 0 0 2px rgba(0,0, 0, 0.9),
        0 4px 8px rgba(0,0, 0, 0.2);
}
.nav-links li:hover .submenu {
    opacity: 1;
    visibility: visible;
}
.submenu a {
    display: block;
    padding: 10px 18px;
    font-size: 13px;
    text-align: center;
}

.main-content {
    margin-top: 80px;
    padding: 20px;
}
.content-section {
    display: none;
	height:800px;
    max-width: 1024px;
    margin: 0 auto;
    padding: 28px;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(18px);
    border-radius: 24px;
    opacity: 0;
    transform: translateY(20px);
    transition:
        opacity 0.42s cubic-bezier(0.28, 0, 0.46, 1),
        transform 0.42s cubic-bezier(0.28, 0, 0.46, 1);
}
.content-section.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.section-inner {
    display: flex;
    align-items: center;
    gap: 24px;
}
.section-inner img {
    width: 120px;
    height: auto;
    object-fit: contain;
}
.text-content {
    flex: 1;
}
.text-content h2 {
    margin: 0 0 10px 0;
    font-size: 24px;
}
.text-content p {
    margin: 0;
    font-size: 15px;
    color: #555;
    line-height: 1.6;
}
.download-btn {
    padding: 12px 30px;
    background: #1677ff;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    transition: background 0.3s;
    white-space: nowrap;
}
.download-btn:hover {
    background: #0958d9;
}

/* ================================== */
/* 手机端：导航自动变底部（唯一修改点） */
/* ================================== */
@media (max-width: 768px) {
    .main-nav {
        top: auto;
        bottom: 20px;
        width: 90%;
        max-width: 400px;
        height: 50px;
    }
    .nav-container {
        justify-content: center;
    }
    .nav-links {
        width: 100%;
        justify-content: space-around;
    }
    .submenu {
        top: auto;
        bottom: 100%;
        margin-bottom: 10px;
    }
    .main-content {
        margin-top: 30px;
    }
	
	
}

.login-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(6px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}
.login-modal.show {
  display: flex;
}
.login-box {
  width: 90%;
  max-width: 380px;
  padding: 30px;
  border-radius: 22px;
  background: linear-gradient(45deg,rgba(255,255,255,0.8),transparent 50%,rgba(255,255,255,0.8));
  backdrop-filter: blur(32px) saturate(180%);
  border: 1px double rgba(51,51,51,0.1);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  text-align: center;
  position: relative;
}
.login-close {
  position: absolute;
  right: 18px;
  top: 14px;
  font-size: 22px;
  cursor: pointer;
  color: #666;
}
.login-box h3 {
  margin-bottom: 20px;
}
.login-form input {
  width: 100%;
  padding: 12px 15px;
  margin: 8px 0;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,0.1);
  background: rgba(255,255,255,0.5);
  outline: none;
}
.login-submit {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  border-radius: 12px;
  background: #007aff;
  color: #fff;
  border: none;
  cursor: pointer;
}
/* 多面板切换控制 */
.reg-panel,.findpwd-panel{
  display:none;
}
.login-modal.show-reg .login-panel,
.login-modal.show-find .login-panel{
  display:none;
}
.login-modal.show-reg .reg-panel{
  display:block;
}
.login-modal.show-find .findpwd-panel{
  display:block;
}
.modal-tip{
  margin-top:12px;
  display:flex;
  justify-content:space-between;
  font-size:13px;
  color:#007aff;
  cursor:pointer;
}
.code-row{
    display:flex;gap:8px;
}
.code-row input{flex:1;}
.get-code{
    white-space:nowrap;
    padding:0 10px;
    background:#007aff;
    border:none;
    border-radius:12px;
    color:#fff;
    cursor:pointer;
}
.get-code:disabled{background:#999;cursor:not-allowed;}

.pwd-wrap{
  position:relative;
}
.pwd-wrap input{
  padding-right:42px !important;
}
.eye-icon{
  position:absolute;
  right:12px;
  top:50%;
  transform:translateY(-50%);
  cursor:pointer;
  color:#777;
}
#macbook-air{
	background-image: url('img/知绘卷界面.png');
	 background-repeat: no-repeat;
	  background-position: center center;
	  background-size: cover;
	  
}
#zqzj{
	background-image: url('img/桌前管家界面.png');
	 background-repeat: no-repeat;
	  background-position: center center;
	  background-size: cover;
}