/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 页面吸底布局：确保 footer 贴底且内容区域自适应 */
html { height: 100%; }
body { min-height: 100vh; display: flex; flex-direction: column; }
.container { flex: 1 0 auto; }
footer.main-footer { margin-top: auto !important; }

/* ————————————————————————————————
   顾问区文字卡片（与 about-us 风格一致）
   ———————————————————————————————— */
.advisory-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 45px;
    border-radius: 20px;
    background: linear-gradient(
        135deg,
        #0f0a1a 0%,
        #1a0f26 12.5%,
        #2d1a3d 25%,
        #3d2650 37.5%,
        #4a2d5a 50%,
        #5a3d6d 62.5%,
        #6d4a7c 75%,
        #7a5d89 87.5%,
        #6d4a7c 100%
    );
    background-size: 600% 600%;
    border: 2px solid rgba(107, 76, 122, 0.4);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulseGlow 6s ease-in-out infinite, gradientFlow 12s ease-in-out infinite;
    box-shadow:
        0 0 20px rgba(107, 76, 122, 0.3),
        0 0 40px rgba(107, 76, 122, 0.1),
        inset 0 0 20px rgba(156, 109, 180, 0.1),
        0 8px 32px rgba(15, 10, 26, 0.4);
}
.advisory-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow:
        0 0 30px rgba(107, 76, 122, 0.5),
        0 0 60px rgba(107, 76, 122, 0.2),
        inset 0 0 30px rgba(156, 109, 180, 0.15),
        0 12px 48px rgba(15, 10, 26, 0.6);
    border-color: rgba(156, 109, 180, 0.6);
}
.advisory-card::before {
    content: '';
    position: absolute;
    top: -2px; left: -2px; right: -2px; bottom: -2px;
    background: linear-gradient(
        45deg,
        #6b4c7a 0%,
        #9c6db4 25%,
        #6b4c7a 50%,
        #9c6db4 75%,
        #6b4c7a 100%
    );
    background-size: 400% 400%;
    border-radius: 22px;
    z-index: -1;
    animation: darkBorder 10s ease-in-out infinite;
}
.advisory-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(156, 109, 180, 0.3) 50%,
        transparent 100%
    );
    animation: flowingLight 8s ease-in-out infinite;
    z-index: 1;
}
.advisory-card h3 {
    color: #fff;
    font-size: 2rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 2;
    font-weight: 600;
    text-shadow:
        0 0 8px rgba(156, 109, 180, 0.5),
        0 2px 4px rgba(0, 0, 0, 0.3),
        0 0 15px rgba(107, 76, 122, 0.2);
}
.advisory-card h3 i {
    margin-right: 20px;
    font-size: 2.2rem;
    background: linear-gradient(135deg, #9c6db4, #b388d6, #c9a3e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 4px rgba(156, 109, 180, 0.4));
    transition: all 0.3s ease;
}
.advisory-card:hover h3 i {
    transform: scale(1.08) rotate(4deg);
    filter: drop-shadow(0 4px 8px rgba(156, 109, 180, 0.6));
}
.advisory-card .advisory-content,
.advisory-card .card-content {
    color: #e0d0e8;
    line-height: 1.9;
    font-size: 1.05rem;
    font-weight: 400;
    letter-spacing: 0.3px;
    position: relative;
    z-index: 2;
    margin: 0;
    --advisory-content-height: 225px;
    max-height: var(--advisory-content-height);
    overflow: hidden;
}
.advisory-card .advisory-content::after,
.advisory-card .card-content::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 80px;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(32,19,45,0) 0%, rgba(32,19,45,0.55) 70%, rgba(32,19,45,0.85) 100%);
}
.advisory-card.expanded .advisory-content,
.advisory-card.expanded .card-content {
    max-height: none;
    overflow-y: auto;
}
.advisory-card.expanded .advisory-content::after,
.advisory-card.expanded .card-content::after { display: none; }

/* 展开状态：滚动条美化 */
.advisory-card.expanded .advisory-content,
.advisory-card.expanded .card-content {
    scrollbar-width: thin; /* Firefox */
    scrollbar-color: #b388d6 rgba(255,255,255,0.10);
}
.advisory-card.expanded .advisory-content::-webkit-scrollbar,
.advisory-card.expanded .card-content::-webkit-scrollbar { width: 6px; }
.advisory-card.expanded .advisory-content::-webkit-scrollbar-track,
.advisory-card.expanded .card-content::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
}
.advisory-card.expanded .advisory-content::-webkit-scrollbar-thumb,
.advisory-card.expanded .card-content::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #b388d6, #9c6db4);
    border-radius: 8px;
}

/* 展开状态：右侧滚动定位竖线与进度块 */
.advisory-card .scroll-track {
    position: absolute;
    right: 10px;
    top: 16px;
    height: calc(100% - 64px); /* 底部预留给按钮 */
    width: 3px;
    border-radius: 3px;
    background: rgba(255,255,255,0.08);
    z-index: 3;
    pointer-events: none;
    opacity: 0;
    transform: translateX(4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.advisory-card.expanded .scroll-track {
    opacity: 1;
    transform: translateX(0);
}
.advisory-card .scroll-track .scroll-progress {
    position: absolute;
    right: 0;
    top: 0;
    width: 3px;
    height: 24px; /* 初始高度，JS 会更新 */
    border-radius: 3px;
    background: linear-gradient(180deg, #b388d6, #9c6db4);
    box-shadow: 0 0 8px rgba(156,109,180,0.5);
}

/* 展开/收起按钮 */
.card-toggle {
    position: absolute;
    right: 16px;
    bottom: 16px;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.25);
    background: rgba(255,255,255,0.08);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 3;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    backdrop-filter: blur(6px);
}
.card-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.25);
    background: rgba(255,255,255,0.12);
}
.card-toggle i { font-size: 16px; }
.advisory-card.expanded .card-toggle i { transform: rotate(180deg); }

/* 响应式调整：在不同屏幕下控制截断高度 */
@media (max-width: 1024px) {
    .advisory-card .advisory-content,
    .advisory-card .card-content { --advisory-content-height: 190px; }
}
@media (max-width: 768px) {
    /* 移动端：标题稍微缩小 */
    .advisory-card h3 { font-size: 1.6rem; }
    .advisory-card h3 i { font-size: 1.8rem; margin-right: 12px; }
    .advisory-card .advisory-content,
    .advisory-card .card-content { --advisory-content-height: 165px; }
}
@media (max-width: 480px) {
    /* 超小屏：标题进一步缩小 */
    .advisory-card h3 { font-size: 1.4rem; }
    .advisory-card h3 i { font-size: 1.6rem; margin-right: 10px; }
    .advisory-card .advisory-content,
    .advisory-card .card-content { --advisory-content-height: 150px; }
}

/* 动画关键帧（与 about-us 保持一致风格） */
@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
@keyframes pulseGlow {
    0% { box-shadow: 0 0 20px rgba(107,76,122,0.30), 0 0 40px rgba(107,76,122,0.10), inset 0 0 20px rgba(156,109,180,0.10), 0 8px 32px rgba(15,10,26,0.40); }
    50% { box-shadow: 0 0 28px rgba(107,76,122,0.45), 0 0 56px rgba(107,76,122,0.20), inset 0 0 26px rgba(156,109,180,0.15), 0 10px 40px rgba(15,10,26,0.55); }
    100% { box-shadow: 0 0 20px rgba(107,76,122,0.30), 0 0 40px rgba(107,76,122,0.10), inset 0 0 20px rgba(156,109,180,0.10), 0 8px 32px rgba(15,10,26,0.40); }
}
@keyframes darkBorder {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}
@keyframes flowingLight {
    0% { left: -100%; }
    50% { left: 0%; }
    100% { left: 100%; }
}

/* 强化：紫色渐变流动效果与流光覆盖（全局覆盖） */
.hero-cta .cta-button {
    background-size: 300% 300%;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 1s ease 0.4s both, gradientFlow 8s linear infinite;
}

.shop-btn,
.navbar.scrolled .shop-btn {
    background-size: 300% 300%;
}

.shop-btn {
    position: relative;
    overflow: hidden;
    animation: gradientFlow 8s linear infinite;
}

/* 透明流光：提高动效可见度 */
.hero-cta .cta-button::before,
.shop-btn::before {
    content: "";
    position: absolute;
    top: 0; left: -30%;
    width: 60%; height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.25) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-20deg);
    filter: blur(0.5px);
    pointer-events: none;
    animation: shimmerSweep 2.5s ease-in-out infinite;
}

.hero-cta .cta-button:hover::before,
.shop-btn:hover::before {
    animation-duration: 1.6s;
}

@keyframes shimmerSweep {
    0%   { left: -30%; opacity: 0; }
    20%  { opacity: 1; }
    50%  { left: 110%; opacity: 0.85; }
    100% { left: 110%; opacity: 0; }
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: transparent;
    backdrop-filter: none;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: nowrap;
    width: 100%;
}

.nav-logo {
    cursor: pointer;
    transition: transform 0.3s ease;
    flex: 0 0 auto;
    text-align: left;
    min-width: 140px;
    padding: 0 0.5rem 0 0;
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-logo-img {
    height: 32px;
    width: auto;
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
    filter: brightness(1.05);
}

/* Logo hover/press interactions */
.nav-logo:hover .nav-logo-img {
    transform: translateY(-2px) scale(1.08);
    filter: brightness(1.12) saturate(1.05);
    box-shadow: 0 10px 24px rgba(156, 109, 180, 0.45);
}
.nav-logo:active .nav-logo-img {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 6px 16px rgba(156, 109, 180, 0.35);
}
.nav-logo:focus-visible .nav-logo-img {
    outline: none;
    box-shadow: 0 0 0 3px rgba(156, 109, 180, 0.5), 0 12px 28px rgba(156, 109, 180, 0.4);
}

/* Adjust glow on light navbar */
.navbar.scrolled .nav-logo:hover .nav-logo-img {
    box-shadow: 0 10px 24px rgba(102, 126, 234, 0.25);
    filter: brightness(1.06);
}
.navbar.scrolled .nav-logo:active .nav-logo-img {
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.18);
}
.navbar.scrolled .nav-logo:focus-visible .nav-logo-img {
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.45), 0 12px 28px rgba(0, 0, 0, 0.12);
}

.nav-logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    transition: all 0.3s ease;
}

.navbar.scrolled .nav-logo h1 {
    color: transparent;
    text-shadow: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-left {
    display: flex;
    gap: 2rem;
    flex: 1 1 auto;
    justify-content: flex-start;
    margin-left: 1rem;
    margin-right: 2rem;
    white-space: nowrap;
    align-items: center; /* 垂直居中，避免有下拉菜单的项偏下 */
}

.nav-left a {
    text-decoration: none;
    color: white;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
}

.navbar.scrolled .nav-left a {
    color: #333;
    text-shadow: none;
}

.nav-left a:hover {
    color: #ccc;
}

.navbar.scrolled .nav-left a:hover {
    color: #667eea;
}

/* Dropdown menu under PRODUCTS */
.nav-item.dropdown { position: relative; }
.nav-item .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(0,0,0,0.85);
    min-width: 220px;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 8px 0;
    z-index: 1001;
    box-shadow: 0 6px 18px rgba(0,0,0,0.35);
}
.nav-item.dropdown:hover > .dropdown-menu { display: block; }
.nav-item .dropdown-menu a {
    display: block;
    padding: 10px 16px;
    color: #fff;
    white-space: nowrap;
}
.nav-item .dropdown-menu a:hover { background: rgba(255,255,255,0.08); color: #fff; }

.navbar.scrolled .nav-item .dropdown-menu { background: #fff; border-color: #ddd; }
.navbar.scrolled .nav-item .dropdown-menu a { color: #333; }
.navbar.scrolled .nav-item .dropdown-menu a:hover { background: #f2f2f2; color: #000; }

/* Nested dropdown (third-level) */
.dropdown-submenu { position: relative; }
.dropdown-submenu > .dropdown-menu {
    top: -8px; /* align with second-level dropdown top (has 8px top padding) */
    left: 100%;
    margin-left: 2px;
    min-width: 220px;
}
.dropdown-submenu:hover > .dropdown-menu { display: block; }

/* Caret indicator for submenu */
.dropdown-submenu > a::after {
    content: '›';
    float: right;
    opacity: 0.7;
}
.navbar.scrolled .dropdown-submenu > a::after { color: #666; }

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex: 0 0 auto;
    justify-content: flex-end;
    margin-left: 0rem;
    padding-left: 0rem;
}

.nav-link {
    text-decoration: none;
    color: white;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.navbar.scrolled .nav-link {
    color: #333;
    text-shadow: none;
}

.nav-link:hover {
    color: #ccc;
}

.navbar.scrolled .nav-link:hover {
    color: #667eea;
}

.nav-icons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Currency selector in navbar (match SHOP button background) */
.currency-select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    color: #000;
    border: 1px solid rgba(156, 109, 180, 0.35);
    border-radius: 4px; /* 与 .shop-btn 一致 */
    padding: 8px 16px; /* 与 .shop-btn 一致 */
    font-size: 0.9rem; /* 与 .shop-btn 一致 */
    cursor: pointer;
    outline: none;
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    /* 移除自定义箭头背景图 */
}
.currency-select:hover {
    filter: brightness(1.05);
    border-color: rgba(156, 109, 180, 0.5);
    color: #000;
}
.currency-select:focus-visible {
    box-shadow: 0 0 0 3px rgba(102,126,234,0.45), 0 6px 16px rgba(0,0,0,0.25);
}

/* Light navbar variant */
.navbar.scrolled .currency-select {
    color: #000;
    border-color: rgba(156, 109, 180, 0.35);
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
    /* 同样不显示箭头 */
}
.navbar.scrolled .currency-select:hover {
    filter: brightness(1.05);
    border-color: rgba(156, 109, 180, 0.5);
    color: #000;
}

@media (max-width: 768px) {
    .currency-select {
        padding: 6px 12px; /* 与移动端 .shop-btn 一致 */
        font-size: 0.8rem; /* 与移动端 .shop-btn 一致 */
        border-radius: 4px;
        /* 不再限制 max-width 以避免与 .shop-btn 宽度不一致 */
    }
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    color: white;
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 18px;
    cursor: pointer;
}
.navbar.scrolled .mobile-menu-btn {
    color: #333;
    border-color: #333;
}

/* Hide mobile menu by default on desktop */
.nav-menu { display: none; }

.cart-icon {
    position: relative;
    text-decoration: none;
    color: white;
    font-size: 1.2rem;
    transition: color 0.3s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.navbar.scrolled .cart-icon {
    color: #333;
    text-shadow: none;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ff4757;
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.shop-btn {
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    color: #ffffff;
    border: 1px solid rgba(156, 109, 180, 0.35);
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
    background-size: 200% 200%;
    background-position: 0% 50%;
    padding: 8px 16px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    will-change: background-position;
    animation: gradientFlow 12s ease infinite;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background-position 0.25s ease;
    text-shadow: none;
}

.navbar.scrolled .shop-btn {
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    color: #ffffff;
    border: 1px solid rgba(156, 109, 180, 0.35);
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
    background-size: 200% 200%;
    background-position: 0% 50%;
}

.shop-btn:hover {
    background-position: 100% 50%;
    box-shadow: 0 22px 60px rgba(156, 109, 180, 0.65), 0 0 22px rgba(156, 109, 180, 0.45);
    transform: translateY(-3px) scale(1.04);
    color: #fff;
}

.navbar.scrolled .shop-btn:hover {
    background-position: 100% 50%;
    box-shadow: 0 22px 60px rgba(156, 109, 180, 0.65), 0 0 22px rgba(156, 109, 180, 0.45);
    transform: translateY(-3px) scale(1.04);
    color: #fff;
}

/* Currency dropdown (SVG) */
.currency-dropdown { position: relative; display: inline-block; }
.currency-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 24px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  background: #fff;
  color: #000;
  cursor: pointer;
}
.navbar.scrolled .currency-toggle { background: #fff; color: #000; }
.currency-menu { position: absolute; left: 0; right: 0; top: 100%; box-sizing: border-box; padding: 6px; background: #fff; border: 1px solid rgba(0,0,0,0.15); border-radius: 8px; box-shadow: 0 10px 20px rgba(0,0,0,0.12); display: none; z-index: 1000; }
.currency-item { display: flex; align-items: center; gap: 8px; padding: 6px 8px; cursor: pointer; color: #000; }
.currency-item[aria-selected="true"] { background: rgba(0,0,0,0.05); border-radius: 6px; }
.currency-item:hover { background: rgba(0,0,0,0.08); }
.currency-flag svg { display: block; border-radius: 2px; }
.currency-dropdown[data-open="true"] .currency-menu { display: block; }
.currency-dropdown:hover .currency-menu { display: block; }

/* 响应式设计 */
@media (max-width: 1024px) {
    .nav-left { display: none; }
    .nav-right { gap: 0.75rem; }
    .mobile-menu-btn { display: inline-block; }

    .nav-menu {
        display: none;
        position: fixed;
        top: 60px;
        right: 12px;
        left: 12px;
        background: #111;
        border: 1px solid #333;
        border-radius: 12px;
        padding: 12px;
        z-index: 1200;
        box-shadow: 0 12px 28px rgba(0,0,0,0.35);
        animation: fadeInMenu 0.2s ease;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .navbar.scrolled .nav-menu { background: #fff; border-color: #ddd; }
    .nav-menu.active { display: block; }
    .nav-menu ul { list-style: none; margin: 0; padding: 0; }
    .nav-menu li { border-bottom: 1px solid #222; }
    .navbar.scrolled .nav-menu li { border-bottom-color: #eee; }
    .nav-menu li:last-child { border-bottom: none; }
    .nav-menu a { display: block; padding: 12px; color: #fff; }
    .navbar.scrolled .nav-menu a { color: #333; }

    .nav-menu .has-submenu > a { display: flex; align-items: center; justify-content: flex-start; }
    .nav-menu .has-submenu > a::after { content: '▼'; position: static; display: inline-block; margin: 0 8px; font-size: 0.8rem; opacity: 0.8; transition: transform 0.2s ease; }
    .nav-menu .has-submenu.active > a::after { transform: rotate(180deg); }

    .nav-menu .mobile-submenu { display: none; background: rgba(0,0,0,0.4); border-left: 2px solid rgba(255,255,255,0.1); padding-left: 6px; animation: fadeInMenu 0.2s ease; }
    .navbar.scrolled .nav-menu .mobile-submenu { background: rgba(255,255,255,0.6); border-left-color: rgba(0,0,0,0.06); }
    .nav-menu .mobile-submenu.active { display: block; }
    .nav-menu .mobile-submenu a { font-size: 0.9rem; padding: 10px 12px; }
    .nav-menu .mobile-submenu .mobile-submenu { background: rgba(0,0,0,0.25); margin-left: 8px; }
    .navbar.scrolled .nav-menu .mobile-submenu .mobile-submenu { background: rgba(255,255,255,0.4); }
}
@media (max-width: 768px) {
    .nav-left {
        display: none;
    }
    
    .nav-right {
        gap: 0.5rem;
    }
    
    .nav-link {
        display: none;
    }
    
    .nav-icons {
        gap: 0.5rem;
    }
    
    .shop-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .nav-logo h1 {
        font-size: 1.5rem;
    }

    /* Shrink logo image and container on mobile to keep hamburger visible */
    .nav-logo-img { height: 28px; }
    .nav-logo { min-width: 100px; padding-right: 0.25rem; }

    .mobile-menu-btn { display: inline-block; }
    .nav-menu {
        display: none;
        position: fixed;
        top: 60px;
        right: 12px;
        left: 12px;
        background: #111;
        border: 1px solid #333;
        border-radius: 12px;
        padding: 12px;
        z-index: 1200;
        box-shadow: 0 12px 28px rgba(0,0,0,0.35);
        animation: fadeInMenu 0.2s ease;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .navbar.scrolled .nav-menu { background: #fff; border-color: #ddd; }
    .nav-menu.active { display: block; }
    .nav-menu ul { list-style: none; margin: 0; padding: 0; }
    .nav-menu li { border-bottom: 1px solid #222; }
    .navbar.scrolled .nav-menu li { border-bottom-color: #eee; }
    .nav-menu li:last-child { border-bottom: none; }
    .nav-menu a { display: block; padding: 12px; color: #fff; }
    .navbar.scrolled .nav-menu a { color: #333; }

    /* Hamburger: second/third-level submenu styles */
    .nav-menu .has-submenu > a {
        display: flex;
        align-items: center;
        justify-content: flex-start;
    }
    .nav-menu .has-submenu > a::after {
        content: '▼';
        position: static;
        display: inline-block;
        margin: 0 8px;
        font-size: 0.8rem;
        opacity: 0.8;
        transition: transform 0.2s ease;
    }
    .nav-menu .has-submenu.active > a::after {
        transform: rotate(180deg);
    }

    .nav-menu .mobile-submenu {
        display: none;
        background: rgba(0,0,0,0.4);
        border-left: 2px solid rgba(255,255,255,0.1);
        padding-left: 6px;
        animation: fadeInMenu 0.2s ease;
    }
    .navbar.scrolled .nav-menu .mobile-submenu {
        background: rgba(255,255,255,0.6);
        border-left-color: rgba(0,0,0,0.06);
    }
    .nav-menu .mobile-submenu.active { display: block; }
    .nav-menu .mobile-submenu a { font-size: 0.9rem; padding: 10px 12px; }
    .nav-menu .mobile-submenu .mobile-submenu {
        background: rgba(0,0,0,0.25);
        margin-left: 8px;
    }
    .navbar.scrolled .nav-menu .mobile-submenu .mobile-submenu {
        background: rgba(255,255,255,0.4);
    }
}

@keyframes fadeInMenu {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}


@media (max-width: 480px) {
    .nav-container {
        padding: 0 10px;
    }
    
    .shop-btn {
        padding: 4px 8px;
        font-size: 0.7rem;
    }
    
    .cart-icon {
        font-size: 1rem;
    }
    
    .cart-count {
        width: 16px;
        height: 16px;
        font-size: 0.6rem;
    }
}

.nav-menu a {
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.navbar.scrolled .nav-menu a {
    color: #333;
    text-shadow: none;
}

.nav-menu a:hover {
    color: #667eea;
}

.navbar.scrolled .nav-menu a:hover {
    color: #667eea;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: #667eea;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 英雄区域样式 */
.hero-section {
    position: relative;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: -1;
    pointer-events: none; /* 确保覆盖层不拦截鼠标事件 */
}

.hero-content {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 2;
    margin-top: 0;
}

.hero-content h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

/* 首页英雄文案：三行层次排版 */
.hero-content .hero-headline {
    margin-bottom: 2.6rem; /* 文案与小字之间的间距（再加大） */
    animation: fadeInUp 1s ease;
}
/* 文案下方两行小字与按钮的间距 */
.hero-subnotes { margin-bottom: 15rem; white-space: nowrap; }
.hero-subnote { line-height: 1.3; display: inline; color: rgba(255,255,255,0.85); font-weight: 700; }
.hero-content .hero-headline .hl-strong,
.hero-content .hero-headline .hl-line {
    display: block;
    color: #fff;
    white-space: nowrap; /* 每一行不自动换行 */
}
.hero-content .hero-headline .hl-strong,
.hero-content .hero-headline .hl-line {
    font-size: 4rem;
    line-height: 1.35; /* 增大行间距，让文案更舒展 */
    letter-spacing: -0.01em;
}
.hero-content .hero-headline .hl-strong { 
    font-weight: 900; 
    letter-spacing: -0.02em; /* 更紧凑以增强粗体视觉 */
    -webkit-text-stroke: 0.3px rgba(255,255,255,0.45); /* 细描边增强厚重感 */
}
.hero-content .hero-headline .hl-line { font-weight: 500; }

.hero-content p {
    font-size: 2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s both;
}

/* 让首页小字的字号优先级更高，避免被 .hero-content p 覆盖 */
.hero-content .hero-subnotes .hero-subnote { font-size: 1.40rem; }

.cta-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 1s ease 0.4s both;
    display: inline-block; /* 保证transform/box-shadow在链接上稳定生效 */
    text-decoration: none;
}

/* 顶部首屏：文案与按钮的静态布局 */
.hero-intro {
    background: #000;
    min-height: 100vh;
    box-sizing: border-box;
    padding: 40px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.hero-intro .hero-content {
    position: static;
    left: auto; top: auto; transform: none;
    color: #fff;
    max-width: 1200px; margin: 0 auto;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

/* Hero CTA positioning */
.hero-cta {
    position: static;
    margin-top: 18px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

/* Hero CTA visual: highlight About the product */
.hero-cta .cta-button {
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    color: #ffffff;
    border: 1px solid rgba(156, 109, 180, 0.35);
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
    text-decoration: none;
    white-space: nowrap;
    font-weight: 800;
    background-size: 200% 200%;
    background-position: 0% 50%;
    will-change: background-position;
    animation: fadeInUp 1s ease 0.4s both, gradientFlow 12s ease infinite;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background-position 0.25s ease, filter 0.25s ease, border-color 0.25s ease;
}
.hero-cta .cta-button:hover {
    background-position: 100% 50%;
    box-shadow: 0 22px 60px rgba(156, 109, 180, 0.65), 0 0 22px rgba(156, 109, 180, 0.45);
    transform: translateY(-4px) scale(1.06);
    border-color: rgba(156, 109, 180, 0.6);
    text-decoration: none;
    filter: brightness(1.05);
}

/* Active (press) feedback */
.hero-cta .cta-button:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 12px 28px rgba(156, 109, 180, 0.45), 0 0 12px rgba(156, 109, 180, 0.3);
}

/* Keyboard focus ring */
.hero-cta .cta-button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(156, 109, 180, 0.5), 0 18px 44px rgba(156, 109, 180, 0.6), 0 0 16px rgba(156, 109, 180, 0.35);
}

/* Place buttons side by side with spacing */
.hero-cta .cta-button { margin: 0; }
.hero-cta .cta-button { min-width: 240px; padding: 1rem 2.8rem; }

/* Contact button: purple background */
.hero-cta .contact-btn {
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    color: #ffffff;
    border: 1px solid rgba(156, 109, 180, 0.35);
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
}
.hero-cta .contact-btn:hover {
    box-shadow: 0 18px 44px rgba(156, 109, 180, 0.6);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .hero-cta { flex-direction: column; gap: 14px; }
    .hero-content h1 { font-size: 1.3rem; }
    .cta-button { padding: 0.9rem 1.6rem; font-size: 1rem; }
    .hero-cta .cta-button { width: 80%; max-width: 360px; }
}

@media (max-width: 480px) {
    .hero-cta { flex-direction: column; gap: 12px; }
    .cta-button { padding: 0.85rem 1.5rem; font-size: 0.95rem; }
    .hero-cta .cta-button { width: 86%; max-width: 320px; }
}



/* 图文结合区域 */
.image-text-section {
    padding: 5rem 0;
}

.image-text-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 4rem;
}

.image-text-item.reverse {
    direction: rtl;
}

.image-text-item.reverse > * {
    direction: ltr;
}

.image-text-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.text-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #333;
}

.text-content p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
}

/* 新的图片横幅区域 - 已移除样式 */



.stats-header {
    text-align: center;
    margin-bottom: 4rem;
}

.stats-header h2 {
    font-size: 3.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.stats-header p {
    font-size: 1.1rem;
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto;
}

.stats-chart {
    position: relative;
    height: 600px;
    max-width: 1000px;
    margin: 0 auto;
}

.chart-line {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 20%, rgba(255,255,255,0.3) 80%, transparent 100%);
    animation: lineGlow 3s ease-in-out infinite;
}

.stat-point {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
}

.stat-point:nth-child(2) { left: 15%; }
.stat-point:nth-child(3) { left: 35%; }
.stat-point:nth-child(4) { left: 60%; }
.stat-point:nth-child(5) { left: 80%; }

/* 上升数据点样式 */
.stat-point.stat-up {
    animation: pointFadeInUp 0.8s ease-out forwards;
}

.stat-point.stat-up .point-dot {
    width: 12px;
    height: 12px;
    background: #4ade80;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px rgba(74, 222, 128, 0.5);
    animation: dotPulseGreen 2s ease-in-out infinite;
}

.stat-point.stat-up .point-line {
    width: 2px;
    height: 80px;
    background: linear-gradient(to top, rgba(74, 222, 128, 0.6), transparent);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -100%);
    animation: lineGrowUp 1s ease-out forwards;
    transform-origin: bottom;
    scale: 1 0;
}

.stat-point.stat-up .stat-card {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, calc(-100% - 90px)) scale(0);
    background: rgba(74, 222, 128, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 12px;
    padding: 1.5rem;
    min-width: 180px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(74, 222, 128, 0.2);
    animation: cardPopUp 0.6s ease-out 0.8s forwards;
}

/* 下降数据点样式 */
.stat-point.stat-down {
    animation: pointFadeInDown 0.8s ease-out forwards;
}

.stat-point.stat-down .point-dot {
    width: 12px;
    height: 12px;
    background: #f87171;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px rgba(248, 113, 113, 0.5);
    animation: dotPulseRed 2s ease-in-out infinite;
}

.stat-point.stat-down .point-line {
    width: 2px;
    height: 80px;
    background: linear-gradient(to bottom, rgba(248, 113, 113, 0.6), transparent);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, 0%);
    animation: lineGrowDown 1s ease-out forwards;
    transform-origin: top;
    scale: 1 0;
}

.stat-point.stat-down .stat-card {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, 100px) scale(0);
    background: rgba(248, 113, 113, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(248, 113, 113, 0.3);
    border-radius: 12px;
    padding: 1.5rem;
    min-width: 180px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(248, 113, 113, 0.2);
    animation: cardPopDown 0.6s ease-out 0.8s forwards;
}

.stat-card .stat-number {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: white;
}

.stat-card .stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.3;
}

/* 动画效果 */
@keyframes pointFadeInUp {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%);
    }
}

@keyframes pointFadeInDown {
    from {
        opacity: 0;
        transform: translateY(-70px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%);
    }
}

@keyframes lineGrowUp {
    from {
        scale: 1 0;
    }
    to {
        scale: 1 1;
    }
}

@keyframes lineGrowDown {
    from {
        scale: 1 0;
    }
    to {
        scale: 1 1;
    }
}

@keyframes cardPopUp {
    from {
        transform: translate(-50%, calc(-100% - 70px)) scale(0);
        opacity: 0;
    }
    to {
        transform: translate(-50%, calc(-100% - 90px)) scale(1);
        opacity: 1;
    }
}

@keyframes cardPopDown {
    from {
        transform: translate(-50%, 100px) scale(0);
        opacity: 0;
    }
    to {
        transform: translate(-50%, 100px) scale(1);
        opacity: 1;
    }
}

@keyframes dotPulseGreen {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 20px rgba(74, 222, 128, 0.5);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        box-shadow: 0 0 30px rgba(74, 222, 128, 0.8);
    }
}

@keyframes dotPulseRed {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 20px rgba(248, 113, 113, 0.5);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        box-shadow: 0 0 30px rgba(248, 113, 113, 0.8);
    }
}

@keyframes lineGlow {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.6;
    }
}

/* 统计区域响应式设计 */
@media (max-width: 768px) {
    .stats-header h2 {
        font-size: 2.5rem;
    }
    
    .stats-chart {
        height: 300px;
    }
    
    .stat-point:nth-child(2) { left: 10%; }
    .stat-point:nth-child(3) { left: 30%; }
    .stat-point:nth-child(4) { left: 65%; }
    .stat-point:nth-child(5) { left: 85%; }
    
    .stat-card {
        min-width: 140px;
        padding: 1rem;
        bottom: 140px;
    }
    
    .stat-card .stat-number {
        font-size: 1.4rem;
    }
    
    .stat-card .stat-label {
        font-size: 0.8rem;
    }
    
    .point-line {
        height: 60px;
    }
    
    .point-dot {
        bottom: 54px;
    }
    
    .chart-line {
        bottom: 60px;
    }
}

/* 数据统计区域 - 已移除样式 */
/* 评论区域 - 已移除样式 */

/* 科学顾问委员会区域 */
.leadership-section {
    padding: 6rem 0;
    background: #f8f9fa;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

/* 顾问委员会区块操作区域与按钮样式 */
.section-actions { text-align:center; margin-top: 1.5rem; }
.section-actions .learn-more-btn {
    display: inline-block;
    padding: 18px 30px;
    border-radius: 32px;
    background: linear-gradient(135deg, #8b6fb5 0%, #9c6db4 100%);
    color: #fff;
    text-decoration: none;
    border: 1px solid rgba(156,109,180,0.55);
    box-shadow: 0 10px 26px rgba(156,109,180,0.38);
    font-size: 1.15rem;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.section-actions .learn-more-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 32px rgba(156,109,180,0.5);
    filter: brightness(1.07);
}

.section-subtitle {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #666;
    margin: 0 0 1rem 0;
}

.leadership-section h2 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0;
    line-height: 1.2;
}

.leadership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* 翻转卡片容器 */
.leader-card-container {
    perspective: 1000px;
    height: 400px;
    position: relative;
}

.leader-card-flip {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.8s ease;
    transform-origin: center center;
}

.leader-card-flip.flipped {
    transform: rotateY(180deg);
}

/* 卡片正面和背面共同样式 */
.leader-card-front,
.leader-card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

/* 正面 - 大图 */
.leader-card-front {
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.leader-main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.leader-card-front:hover .leader-main-image {
    transform: scale(1.05);
}

/* 背面 - 介绍信息 */
.leader-card-back {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: rotateY(180deg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    box-sizing: border-box;
}

.leader-info-detailed {
    text-align: center;
    color: white;
    width: 100%;
}

.leader-avatar {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem auto;
}

.leader-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, 0.8);
}

.verification-badge {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 24px;
    height: 24px;
    background: #28a745;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.verification-badge svg {
    color: white;
    width: 12px;
    height: 12px;
}

.leader-info-detailed h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.leader-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
    opacity: 0.9;
}

.leader-description {
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0 0 1.5rem 0;
    opacity: 0.8;
}

/* 翻转按钮 */
.flip-button {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.flip-button:hover {
    background: white;
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.flip-button svg {
    color: #333;
    transition: transform 0.3s ease;
}

.flip-button:hover svg {
    transform: translateX(2px);
}

.flip-back {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.flip-back svg {
    color: white;
}

.flip-back:hover {
    background: rgba(255, 255, 255, 0.3);
}

.flip-back:hover svg {
    transform: translateX(-2px);
}

/* 科学顾问委员会响应式设计 */
@media (max-width: 1024px) {
    .leadership-section {
        padding: 4rem 0;
    }
    
    .leadership-section h2 {
        font-size: 2.4rem;
    }
    
    .leadership-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }
    
    .leader-card-container {
        height: 350px;
    }
    
    .leader-card-back {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .leadership-section {
        padding: 3rem 0;
    }
    
    .section-header {
        margin-bottom: 3rem;
    }
    
    .leadership-section h2 {
        font-size: 2rem;
    }
    
    .leadership-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .leader-card-container {
        height: 300px;
    }
    
    .leader-card-back {
        padding: 1.2rem;
    }
    
    .leader-avatar {
        width: 60px;
        height: 60px;
        margin-bottom: 1rem;
    }
    
    .verification-badge {
        width: 20px;
        height: 20px;
    }
    
    .verification-badge svg {
        width: 10px;
        height: 10px;
    }
    
    .leader-info-detailed h3 {
        font-size: 1.2rem;
    }
    
    .leader-title {
        font-size: 0.9rem;
    }
    
    .leader-description {
        font-size: 0.8rem;
        margin-bottom: 1rem;
    }
    
    .flip-button {
        width: 40px;
        height: 40px;
        top: 15px;
        right: 15px;
    }
    
    .flip-button svg {
        width: 16px;
        height: 16px;
    }
}

@media (max-width: 480px) {
    .leadership-section {
        padding: 2.5rem 0;
    }
    
    .section-subtitle {
        font-size: 0.8rem;
        letter-spacing: 1.5px;
    }
    
    .leadership-section h2 {
        font-size: 1.8rem;
    }
    
    .leader-card-container {
        height: 280px;
    }
    
    .leader-card-back {
        padding: 1rem;
    }
    
    .leader-avatar {
        width: 50px;
        height: 50px;
        margin-bottom: 0.8rem;
    }
    
    .verification-badge {
        width: 18px;
        height: 18px;
    }
    
    .verification-badge svg {
        width: 8px;
        height: 8px;
    }
    
    .leader-info-detailed h3 {
        font-size: 1.1rem;
        margin-bottom: 0.3rem;
    }
    
    .leader-title {
        font-size: 0.85rem;
        margin-bottom: 0.8rem;
    }
    
    .leader-description {
        font-size: 0.75rem;
        line-height: 1.4;
        margin-bottom: 0.8rem;
    }
    
    .flip-button {
        width: 35px;
        height: 35px;
        top: 10px;
        right: 10px;
    }
    
    .flip-button svg {
        width: 14px;
        height: 14px;
    }
}

/* 其他产品区域 */
.other-products-section {
    padding: 6rem 0;
    background: #f8f9fa;
}

.other-products-section h2 {
    text-align: center;
    font-size: 2.8rem;
    font-weight: 400;
    margin-bottom: 4rem;
    color: #333;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.product-card {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    position: relative;
    min-height: 300px;
    display: flex;
    flex-direction: row;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.product-image {
    flex: 0 0 50%;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-content {
    flex: 1;
    padding: 2rem;
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.product-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.shop-now-btn {
    background: white;
    color: #2c3e50;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.shop-now-btn:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
}

/* 其他产品区域响应式设计 */
@media (max-width: 1024px) {
    .other-products-section {
        padding: 5rem 0;
    }
    
    .other-products-section h2 {
        font-size: 2.4rem;
        margin-bottom: 3rem;
    }
    
    .products-grid {
        gap: 2.5rem;
        max-width: 900px;
        padding: 0 1rem;
    }
    
    .product-card {
        min-height: 280px;
    }
    
    .product-content {
        padding: 1.8rem;
    }
    
    .product-content h3 {
        font-size: 1.4rem;
    }
    
    .product-content p {
        font-size: 0.95rem;
    }
}

@media (max-width: 768px) {
    .other-products-section {
        padding: 4rem 0;
    }
    
    .other-products-section h2 {
        font-size: 2rem;
        margin-bottom: 2.5rem;
        padding: 0 1rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        max-width: 600px;
        padding: 0 1rem;
    }
    
    .product-card {
        min-height: 250px;
        flex-direction: row;
    }
    
    .product-image {
        flex: 0 0 45%;
    }
    
    .product-content {
        flex: 1;
        padding: 1.5rem;
    }
    
    .product-content h3 {
        font-size: 1.3rem;
        margin-bottom: 0.6rem;
    }
    
    .product-content p {
        font-size: 0.9rem;
        margin-bottom: 1.2rem;
    }
    
    .shop-now-btn {
        padding: 0.7rem 1.3rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .other-products-section {
        padding: 3rem 0;
    }
    
    .other-products-section h2 {
        font-size: 1.6rem;
        margin-bottom: 2rem;
        line-height: 1.3;
    }
    
    .products-grid {
        gap: 1.5rem;
        max-width: 100%;
        padding: 0 0.5rem;
    }
    
    .product-card {
        min-height: 200px;
        border-radius: 15px;
        flex-direction: column;
    }
    
    .product-image {
        flex: 0 0 120px;
    }
    
    .product-content {
        flex: 1;
        padding: 1.2rem;
    }
    
    .product-content h3 {
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
    }
    
    .product-content p {
        font-size: 0.85rem;
        line-height: 1.4;
        margin-bottom: 1rem;
    }
    
    .shop-now-btn {
        padding: 0.6rem 1.1rem;
        font-size: 0.8rem;
        border-radius: 6px;
    }
}

/* 科技区域 */
.technology-section {
    padding: 5rem 0;
}

.technology-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-5px);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tech-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.tech-item p {
    color: #666;
}

/* 健康检测区域 */
.health-check-section {
    padding: 6rem 0;
    background: #f8f9fa;
}

.health-check-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.health-check-text {
    padding-right: 2rem;
}

.health-check-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #666;
    margin-bottom: 1rem;
}

.health-check-text h2 {
    font-size: 2.8rem;
    font-weight: 300;
    line-height: 1.2;
    color: #333;
    margin-bottom: 1.5rem;
}

.health-check-text > p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 3rem;
}

.health-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.health-feature {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.feature-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    margin-top: 0.2rem;
}

.feature-content h3 {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #333;
    margin-bottom: 0.5rem;
}

.feature-content p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: #666;
}

.health-check-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.health-monitor {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    border-radius: 20px;
    padding: 3rem 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.health-monitor::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.monitor-screen {
    position: relative;
    z-index: 1;
}

.health-metrics {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

.metric-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 250px;
    transition: all 0.3s ease;
}

.metric-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.metric-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.metric-label {
    color: white;
    font-size: 0.95rem;
    font-weight: 500;
}

.health-disclaimer {
    max-width: 400px;
    text-align: center;
}

.health-disclaimer p {
    font-size: 0.75rem;
    line-height: 1.4;
    color: #999;
    font-style: italic;
}

/* 健康检测区域响应式设计 */
@media (max-width: 1024px) {
    .health-check-section {
        padding: 4rem 0;
    }
    
    .health-check-content {
        gap: 3rem;
        padding: 0 2rem;
    }
    
    .health-check-text h2 {
        font-size: 2.4rem;
    }
    
    .health-monitor {
        padding: 2.5rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .health-check-section {
        padding: 3rem 0;
    }
    
    .health-check-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding: 0 1rem;
    }
    
    .health-check-text {
        padding-right: 0;
        text-align: center;
    }
    
    .health-check-text h2 {
        font-size: 2rem;
    }
    
    .health-features {
        gap: 1.5rem;
    }
    
    .health-feature {
        text-align: left;
    }
    
    .health-monitor {
        padding: 2rem 1rem;
        margin: 0 1rem 2rem;
    }
    
    .metric-item {
        min-width: 200px;
        padding: 0.8rem 1rem;
    }
    
    .health-disclaimer {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .health-check-text h2 {
        font-size: 1.8rem;
    }
    
    .health-check-text > p {
        font-size: 1rem;
    }
    
    .health-feature {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .feature-icon {
        align-self: center;
    }
    
    .metric-item {
        min-width: 180px;
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
}

/* 购买区域 */
.purchase-section {
    padding: 0;
}

.purchase-hero {
    position: relative;
    height: 70vh;
    min-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.purchase-bg-image {
    object-fit: cover;
}

.purchase-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    background: rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Three-image background row for purchase hero */
.purchase-bg-row {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    z-index: 1;
}
.purchase-bg-row .purchase-bg-image {
    position: relative;
    width: 33.3333%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.purchase-content {
    text-align: center;
    color: white;
    max-width: 600px;
    padding: 0 2rem;
}

.purchase-content h2 {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.purchase-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.purchase-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.purchase-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.purchase-btn.primary {
    background: linear-gradient(135deg, #764ba2 0%, #9c6db4 100%);
    color: #ffffff;
    border: 1px solid rgba(156, 109, 180, 0.35);
    box-shadow: 0 14px 36px rgba(156, 109, 180, 0.5);
    background-size: 200% 200%;
    background-position: 0% 50%;
    will-change: background-position;
    position: relative;
    overflow: hidden;
    animation: gradientFlow 12s ease infinite;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background-position 0.25s ease, filter 0.25s ease, border-color 0.25s ease;
    text-shadow: none;
}

.purchase-btn.primary:hover {
    background-position: 100% 50%;
    box-shadow: 0 22px 60px rgba(156, 109, 180, 0.65), 0 0 22px rgba(156, 109, 180, 0.45);
    transform: translateY(-3px) scale(1.04);
    border-color: rgba(156, 109, 180, 0.6);
    filter: brightness(1.05);
}

/* Flowing shimmer overlay */
.purchase-btn.primary::before {
    content: "";
    position: absolute;
    top: 0; left: -30%;
    width: 60%; height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.25) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-20deg);
    filter: blur(0.5px);
    pointer-events: none;
    animation: shimmerSweep 2.5s ease-in-out infinite;
}

.purchase-btn.primary:hover::before {
    animation-duration: 1.6s;
}

/* Active and focus-visible states */
.purchase-btn.primary:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 12px 28px rgba(156, 109, 180, 0.45), 0 0 12px rgba(156, 109, 180, 0.3);
}

.purchase-btn.primary:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(156, 109, 180, 0.5), 0 18px 44px rgba(156, 109, 180, 0.6), 0 0 16px rgba(156, 109, 180, 0.35);
}

.purchase-btn.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.purchase-btn.secondary:hover {
    background: white;
    color: #667eea;
}

/* 购买区域响应式设计 */
@media (max-width: 768px) {
    .purchase-hero {
        height: 60vh;
        min-height: 400px;
    }
    
    .purchase-content {
        padding: 0 1rem;
    }
    
    .purchase-content h2 {
        font-size: 2.2rem;
    }
    
    .purchase-content p {
        font-size: 1.1rem;
    }
    
    .purchase-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .purchase-btn {
        width: 200px;
    }
}

@media (max-width: 480px) {
    .purchase-hero {
        height: 50vh;
        min-height: 350px;
    }
    
    .purchase-content h2 {
        font-size: 1.8rem;
    }
    
    .purchase-content p {
        font-size: 1rem;
    }
    
    .purchase-btn {
        width: 180px;
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}

/* 底部样式 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.footer-section p {
    color: #bdc3c7;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #667eea;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    color: #bdc3c7;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 2rem;
    border-radius: 15px;
    width: 80%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* 渐变背景流动效果（用于紫色渐变按钮） */
@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 交互式区域响应式设计 */
@media (max-width: 768px) {
    .interactive-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .features-panel {
        order: 2;
    }
    
    .feature-image-display {
        order: 1;
    }
    
    .feature-item h3 {
        font-size: 2.2rem;
    }
    
    .temperature-indicator {
        bottom: 15px;
    }
    
    .temp-circle {
        width: 60px;
        height: 60px;
    }
    
    .temp-value {
        font-size: 1.2rem;
    }
    
    .temp-label {
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .interactive-section {
        padding: 3rem 0;
    }
    
    .feature-item {
        padding: 1rem 0;
    }
    
    .feature-item h3 {
        font-size: 1.8rem;
    }
    
    .temperature-indicator.left {
        left: 20%;
    }
    
    .temperature-indicator.right {
        right: 20%;
    }
    
    .temp-circle {
        width: 50px;
        height: 50px;
    }
    
    .temp-value {
        font-size: 1rem;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content .hero-headline .hl-strong,
    .hero-content .hero-headline .hl-line { font-size: 2.2rem; }
    
    .hero-content .hero-headline { margin-bottom: 1.2rem; }
    .hero-subnotes { margin-bottom: 11rem; white-space: nowrap; }
    .hero-content .hero-subnotes .hero-subnote { font-size: 0.86rem; }
    
    .hero-content p { font-size: 1.6rem; }
    
    .image-text-item {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .interactive-content {
        grid-template-columns: 1fr;
    }
    
    .purchase-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .purchase-btn {
        width: 200px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    /* 移动端：统一缩小字号，并确保五行完整展示不被裁剪 */
    .hero-content .hero-headline {
        display: block;
        -webkit-line-clamp: initial;
        line-clamp: initial;
        -webkit-box-orient: initial;
        overflow: visible;
        margin-bottom: 1.2rem; /* 文案与小字之间的间距（超小屏，再加大） */
    }
    .hero-subnotes { margin-bottom: 11rem; white-space: nowrap; }
    
    .hero-content .hero-headline .hl-strong,
    .hero-content .hero-headline .hl-line { font-size: 1.3rem; }
    .hero-content .hero-subnotes .hero-subnote { font-size: 0.80rem; }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .video-item video {
        width: 100%;
        height: auto;
    }
}