/* --- 原有样式保持不变 --- */
:root {
    --primary-color: #0066ff; /* 海译通品牌蓝 */
    --secondary-color: #4d94ff;
    --text-color: #1e293b;
    --light-text: #64748b;
    --bg-color: #ffffff;
    --card-bg: #f8fafc;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 72px;
    z-index: 2000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
}

header nav.container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    transition: var(--transition);
}

.logo-container:hover {
    opacity: 0.8;
}

.logo-img {
    width: 34px;
    height: 34px;
    display: block;
}

.logo-container span {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.02em;
}

/* 导航切换按钮 (Mobile Only) */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 2100;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2.8rem;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.05rem;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

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

.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a.active::after {
    width: 100%;
}

.nav-auth {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: 2rem;
}

.btn-login {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn-login:hover {
    color: var(--primary-color);
}

.btn-register {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1.2rem;
    border-radius: 2rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.2);
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 102, 255, 0.3);
    color: white;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

main.container {
    position: relative;
    z-index: 50; /* 确保在背景之上 */
    background: white;
}

.doc-container {
    max-width: var(--max-width);
    margin: 100px auto 4rem;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    width: 100%;
}

.sidebar {
    position: sticky;
    top: 6rem;
    height: calc(100vh - 8rem);
    overflow-y: auto;
    padding-right: 1rem;
    border-right: 1px solid #f1f5f9;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--light-text);
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    font-weight: 700;
}

.sidebar-item {
    margin-bottom: 0.5rem;
}

.sidebar-link {
    display: block;
    padding: 0.6rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar-link:hover, .sidebar-link.active {
    background: rgba(0, 102, 255, 0.08);
    color: var(--primary-color);
}

.doc-content {
    min-width: 0;
}

.doc-section {
    margin-bottom: 5rem;
    scroll-margin-top: 8rem;
}

/* Doc Tip Boxes */
.doc-tip {
    padding: 1.5rem;
    border-radius: 1rem;
    margin: 1.5rem 0;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.doc-tip-info {
    background: #f0f7ff;
    border-left: 4px solid #0066ff;
    color: #0044aa;
}

.doc-tip-warning {
    background: #fffbeb;
    border-left: 4px solid #f59e0b;
    color: #92400e;
}

.doc-tip .icon {
    font-size: 1.2rem;
}

.doc-section h3 {
    font-size: 1.5rem;
    margin: 2.5rem 0 1rem;
    color: var(--text-color);
}

.doc-section table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

.doc-section th, .doc-section td {
    padding: 1rem;
    border: 1px solid #e2e8f0;
    text-align: left;
}

.doc-section th {
    background: #f8fafc;
    font-weight: 700;
}

.doc-section h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.doc-section h2 {
    font-size: 1.8rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #f1f5f9;
}

.doc-section p {
    margin-bottom: 1.2rem;
    color: #475569;
    line-height: 1.8;
}

.code-block {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 0.75rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    margin: 1.5rem 0;
    overflow-x: auto;
}

footer {
    background: #f8fafc;
    padding: 4rem 0 2rem;
    border-top: 1px solid #f1f5f9;
    margin-top: 6rem;
    width: 100%;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    color: var(--light-text);
    margin-top: 1rem;
    max-width: 300px;
    line-height: 1.8;
}

.footer-column h4 {
    margin-bottom: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    font-size: 1.1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--light-text);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
    color: #94a3b8;
    font-size: 0.9rem;
}

.hero {
    padding: 12rem 0 6rem;
    background: #fff;
    overflow: hidden;
    position: relative;
}

.hero-bg-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* 降低层级到最底层 */
    pointer-events: none;
}

#heroCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.4;
    pointer-events: none !important; /* 强制不拦截点击 */
}

.tech-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    pointer-events: none !important;
}

.floating-shapes {
    pointer-events: none !important;
}

.floating-shapes .shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    opacity: 0.15;
    animation: float 20s infinite alternate ease-in-out;
    pointer-events: none !important;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-color);
    bottom: -50px;
    left: -50px;
    animation-delay: -5s !important;
}

.shape-3 {
    width: 250px;
    height: 250px;
    background: #7c3aed;
    top: 20%;
    left: 10%;
    animation-delay: -10s !important;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 4rem;
    justify-content: flex-start;
    position: relative;
    z-index: 10;
}

.hero-content {
    flex: 1;
    position: relative;
    z-index: 20; /* 确保文字和按钮在最上层 */
}

/* 进场动画 */
.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards 0.2s;
}

.hero-subtitle {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #333;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards 0.4s;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--light-text);
    margin-bottom: 2.5rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards 0.6s;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards 0.8s;
}

/* 科技感装饰：数据流线 */
.data-line {
    position: absolute;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    height: 1px;
    width: 150px;
    opacity: 0.3;
    animation: moveLine 8s infinite linear;
}

.line-1 { top: 20%; left: -10%; animation-delay: 0s; }
.line-2 { top: 40%; right: -5%; animation-delay: 2s; width: 200px; }
.line-3 { bottom: 30%; left: 5%; animation-delay: 4s; }

@keyframes moveLine {
    0% { transform: translateX(-100%) translateY(0); opacity: 0; }
    50% { opacity: 0.3; }
    100% { transform: translateX(500%) translateY(50px); opacity: 0; }
}

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

.hero-image-wrapper {
    flex: 0 0 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 2000px;
    opacity: 0;
    animation: fadeIn 1s forwards 0.5s;
}

.software-screenshot {
    width: 100%;
    max-width: 600px;
    border-radius: 1.25rem;
    box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.3);
    z-index: 5;
    transform: rotateY(-15deg) rotateX(10deg);
    transition: transform 0.3s ease-out;
}

.aurora-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.2) 0%, rgba(77, 148, 255, 0.1) 40%, transparent 70%);
    filter: blur(60px);
    z-index: 1;
    pointer-events: none; /* 防止发光层拦截点击 */
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-secondary {
    background-color: #f0f0f0;
    color: var(--text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2.5rem 2rem;
    border-radius: 1.5rem;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    background-color: #ffffff;
    box-shadow: var(--shadow);
}

/* Pricing Table */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 强制 1x4 布局 */
    gap: 1.5rem;
    margin: 4rem 0;
    align-items: stretch; /* 确保卡片等高 */
}

.monthly-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-card {
    background: white;
    padding: 2.5rem 1.5rem;
    border-radius: 2rem;
    border: 1px solid #f1f5f9;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column; /* 内部内容垂直排列 */
    height: 100%;
}

.pricing-card .btn {
    margin-top: auto; /* 将按钮推到底部，确保对齐 */
}

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    box-shadow: 0 20px 40px rgba(0, 102, 255, 0.1);
}

.popular-badge {
    position: absolute;
    top: 20px;
    right: -35px;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 3rem;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 700;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin: 1.5rem 0;
    color: var(--text-color);
}

.price span {
    font-size: 1rem;
    color: var(--light-text);
}

.pricing-features {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.pricing-features li {
    margin-bottom: 1rem;
    color: var(--light-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features li::before {
    content: "✓";
    color: var(--primary-color);
    font-weight: 800;
}

/* Auth & User Center Styles */
.auth-container {
    max-width: 450px;
    margin: 120px auto 6rem;
    padding: 3rem;
    background: white;
    border-radius: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid #f1f5f9;
}

.auth-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.auth-header h1 {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.auth-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--light-text);
}

.auth-form input {
    width: 100%;
    padding: 0.8rem 1.2rem;
    border-radius: 0.8rem;
    border: 1px solid #e2e8f0;
    font-size: 1rem;
    transition: var(--transition);
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.auth-btn {
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: 0.8rem;
    background: var(--primary-color);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
}

.auth-btn:hover {
    background: #0052cc;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.2);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--light-text);
    font-size: 0.9rem;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* User Center Empty State */
.user-center-empty {
    max-width: 600px;
    margin: 150px auto 6rem;
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid #f1f5f9;
}

.user-center-empty .icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1.5rem;
}

.user-center-empty h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

/* Features Tabs Section */
.features-tabs-section {
    padding: 8rem 0;
    background: #fff;
}

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

.tabs-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.tabs-header p {
    color: var(--light-text);
    font-size: 1.2rem;
}

.tabs-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: flex-start;
}

.tabs-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tab-btn {
    padding: 1.2rem 1.5rem;
    border: 1px solid #f1f5f9;
    background: #f8fafc;
    border-radius: 0.75rem;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: #f1f5f9;
    border-color: #e2e8f0;
}

.tab-btn.active {
    background: white;
    border-color: var(--text-color);
    box-shadow: var(--shadow);
    color: var(--primary-color);
}

.tabs-content {
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
    border-radius: 2rem;
    padding: 3rem;
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.tab-pane-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: center;
}

.tab-text h3 {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.tab-text p {
    font-size: 1.1rem;
    color: var(--light-text);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.tab-text ul {
    list-style: none;
    padding: 0;
}

.tab-text li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 600;
    color: var(--text-color);
}

.tab-text li::before {
    content: "✓";
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 0.8rem;
}

.tab-image img {
    width: 100%;
    height: auto;
    border-radius: 1.5rem;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.tab-pane {
    display: none;
    width: 100%;
    animation: fadeIn 0.5s ease;
}

.tab-pane.active {
    display: block;
}

.tab-pane img {
    width: 100%;
    height: auto;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Download Page Styles */
.download-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.download-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: white;
    border: 1px solid #f1f5f9;
    border-radius: 1rem;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.download-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.os-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.download-info {
    flex: 1;
}

.file-name {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 0.2rem;
    display: block;
}

.file-meta {
    font-size: 0.85rem;
    color: var(--light-text);
}

.download-action {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.9rem;
}

.security-notice {
    background: #fffbeb;
    border-left: 4px solid #f59e0b;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.security-notice .icon {
    font-size: 1.5rem;
}

.security-notice p {
    font-size: 0.95rem;
    color: #92400e;
    line-height: 1.6;
    margin: 0;
}

/* Platforms Grid in Docs */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.platform-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 1rem;
    padding: 1.5rem 1rem;
    text-align: center;
    transition: var(--transition);
}

.platform-item:hover {
    transform: translateY(-5px);
    background: white;
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.platform-icon {
    font-size: 2.5rem;
    margin-bottom: 0.8rem;
    display: block;
}

.platform-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
}

/* Feedback Form Styles */
.feedback-container {
    max-width: 800px;
    margin: 120px auto 6rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.feedback-form-card {
    background: white;
    padding: 3rem;
    border-radius: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid #f1f5f9;
}

.qa-section {
    padding: 2rem 0;
}

.qa-item {
    margin-bottom: 2rem;
}

.qa-question {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    display: flex;
    gap: 0.8rem;
}

.qa-question::before {
    content: "Q";
    color: var(--primary-color);
}

.qa-answer {
    color: var(--light-text);
    line-height: 1.8;
    padding-left: 1.8rem;
}

.online-service-card {
    background: linear-gradient(135deg, #0066ff 0%, #4d94ff 100%);
    color: white;
    padding: 2.5rem;
    border-radius: 2rem;
    text-align: center;
    margin-top: 3rem;
}

.online-service-card h3 {
    margin-bottom: 1rem;
}

/* Testimonials & FAQ Styles */
.testimonials-section {
    padding: 8rem 0;
    background: linear-gradient(to bottom, #fff, #f8fafc);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.testimonial-card {
    background: white;
    padding: 2.5rem;
    border-radius: 2rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.user-avatar {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
}

.user-details h4 {
    font-size: 1.1rem;
    color: var(--text-color);
}

.user-details span {
    font-size: 0.85rem;
    color: var(--light-text);
}

.testimonial-content {
    font-style: italic;
    color: var(--light-text);
    line-height: 1.7;
    font-size: 1rem;
}

/* FAQ Accordion */
.faq-section {
    padding: 8rem 0;
}

.faq-list {
    max-width: 800px;
    margin: 4rem auto 0;
}

.faq-item {
    background: #f8fafc;
    border-radius: 1.2rem;
    margin-bottom: 1.2rem;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(0, 102, 255, 0.05);
    background: white;
}

.faq-item.active {
    background: white;
    border-color: var(--primary-color);
    box-shadow: 0 15px 35px rgba(0, 102, 255, 0.08);
}

.faq-question {
    padding: 1.8rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-color);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    color: var(--light-text);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    padding: 0 2rem 1.5rem;
    max-height: 500px;
}

.faq-icon {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

/* Home New Sections Styles */
.home-pricing-section {
    padding: 6rem 0;
}

.stats-banner-section {
    padding: 6rem 0;
    background: radial-gradient(circle at bottom, rgba(0, 102, 255, 0.03), transparent 70%);
}

.stats-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    margin-top: 4rem;
    text-align: center;
}

.stat-item {
    flex: 1;
}

.stat-value {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--light-text);
    font-size: 1rem;
    font-weight: 600;
}

/* Pricing Section Adjustments */
.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
}

.pricing-features li {
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.pricing-features li::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: #e0f2fe;
    color: #0ea5e9;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 900;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */

/* Large Tablets & Small Laptops (Max 1024px) */
@media (max-width: 1024px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-image-wrapper {
        flex: 0 0 auto;
        width: 100%;
        max-width: 500px;
    }

    .stats-grid {
        flex-wrap: wrap;
        justify-content: center;
        gap: 3rem;
    }

    .stat-item {
        flex: 0 0 40%;
    }

    .tabs-container {
        grid-template-columns: 1fr;
    }

    .tabs-list {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 1rem;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        white-space: nowrap;
        padding: 0.8rem 1.2rem;
    }

    .doc-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid #f1f5f9;
        margin-bottom: 2rem;
        padding-right: 0;
        padding-bottom: 1rem;
    }

    .sidebar-menu {
        display: flex;
        overflow-x: auto;
        gap: 1rem;
        padding-bottom: 0.5rem;
    }

    .sidebar-item {
        flex-shrink: 0;
        margin-bottom: 0;
    }
}

/* Mobile Devices (Max 768px) */
@media (max-width: 768px) {
    header nav.container {
        padding: 0 1.5rem;
    }

    .nav-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transition: var(--transition);
        z-index: 1900;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        visibility: hidden; /* 默认隐藏 */
        pointer-events: none; /* 默认不拦截点击 */
    }

    .nav-links.active {
        left: 0;
        visibility: visible;
        pointer-events: auto;
    }

    .nav-auth {
        margin-left: 0;
        margin-top: 2rem;
        width: 100%;
        justify-content: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.8rem;
    }

    .hero-desc {
        font-size: 1.1rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-brand {
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-brand p {
        max-width: 100%;
    }

    .footer-column {
        text-align: center;
    }

    .pricing-grid {
        grid-template-columns: 1fr !important; /* 强制单列 */
    }

    .tab-pane-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .tab-text {
        text-align: center;
    }

    .tab-text li {
        justify-content: center;
    }

    .feedback-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .stats-grid {
        gap: 2rem;
    }

    .stat-value {
        font-size: 2.2rem;
    }

    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Small Mobile (Max 480px) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero {
        padding-top: 8rem;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .platforms-grid {
        grid-template-columns: 1fr;
    }
}