/* ========================================
   外贸智能助理官网 - 高端商务风格
   ======================================== */

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --text: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg: #f8fafc;
    --bg-white: #ffffff;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

ul, ol {
    list-style: none;
}

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

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

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

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #fff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

/* Banner 深色底上的描边按钮：文字必须白色 */
.banner .btn-outline {
    color: #fff;
    border-color: rgba(255,255,255,0.6);
}

.banner .btn-outline:hover {
    background: rgba(255,255,255,0.12);
    border-color: #fff;
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-white {
    background: #fff;
    color: var(--primary);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}

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

.btn-lg {
    padding: 16px 36px;
    font-size: 17px;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

/* ========================================
   头部导航
   ======================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border);
}

.header .container {
    display: block;
    height: auto;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 72px;
    white-space: nowrap;
}

.logo {
    flex-shrink: 0;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-dark);
}

.logo-icon {
    display: block;
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.nav {
    flex: 1;
    display: flex;
    justify-content: center;
    min-width: 0;
}

.nav ul {
    display: flex;
    gap: 4px;
}

.nav a {
    display: block;
    padding: 8px 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    border-radius: 8px;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

.header-cta {
    flex-shrink: 0;
    margin-left: auto;
}

.header-cta .btn {
    padding: 10px 24px;
}

/* 移动端汉堡按钮（默认隐藏，≤768px 显示） */
.nav-toggle {
    display: none;
    align-items: center;
    gap: 6px;
    height: 42px;
    padding: 0 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    flex-shrink: 0;
}

.nav-toggle-bars {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 18px;
}

.nav-toggle-bars span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: var(--primary-dark);
    transition: var(--transition);
}

.nav-toggle-text {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-dark);
}

.nav-toggle.open {
    background: var(--primary);
    border-color: var(--primary);
}

.nav-toggle.open .nav-toggle-bars span,
.nav-toggle.open .nav-toggle-text {
    background: #fff;
    color: #fff;
}

.nav-toggle.open .nav-toggle-bars span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.open .nav-toggle-bars span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open .nav-toggle-bars span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* 展开菜单底部动作区：桌面端不显示 */
.nav-mobile-actions {
    display: none;
}

/* ========================================
   通用区块标题
   ======================================== */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-title p {
    font-size: 17px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   首页Banner
   ======================================== */
.banner {
    position: relative;
    padding: 24px 0 32px;
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #3b82f6 100%);
    color: #fff;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* 左右两栏：左文案 + 右演示视频 */
.banner-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: 60px;
}

.banner-content {
    position: relative;
    z-index: 1;
    text-align: left;
    max-width: none;
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.banner-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    font-size: 15px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.banner h1 {
    font-size: 38px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 22px;
    letter-spacing: -1px;
}

.banner h1 .highlight {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: "KaiTi", "STKaiti", "楷体", serif;
    font-size: 0.9em;
}

.banner-desc {
    font-size: 19px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 40px;
}

.banner-buttons {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    margin-bottom: 48px;
}

.banner-stats {
    display: flex;
    justify-content: flex-start;
    gap: 44px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-num {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    opacity: 0.8;
    font-weight: 500;
}

/* ===== Banner 右侧演示视频 ===== */
.banner-media {
    position: relative;
    z-index: 1;
}

.video-frame {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: #0b1220;
    border: 1px solid rgba(255,255,255,0.18);
    box-shadow: 0 30px 70px -20px rgba(2, 6, 23, 0.75);
}

.banner-video {
    display: block;
    width: 100%;
    min-height: 380px;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    /* 封面由内联 style 注入并兼作背景：视频停在末帧黑屏时仍有画面兜底 */
    background-color: #0b1220;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

.video-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 6px 14px;
    font-size: 13px;
    color: #fff;
    background: rgba(15, 23, 42, 0.62);
    border: 1px solid rgba(255,255,255,0.22);
    border-radius: 50px;
    backdrop-filter: blur(8px);
    pointer-events: none;
}

/* 视频下方柔光，让卡片"浮"在渐变背景上 */
.video-glow {
    position: absolute;
    left: 8%;
    right: 8%;
    bottom: -34px;
    height: 70px;
    background: radial-gradient(ellipse at center, rgba(96, 165, 250, 0.55), transparent 70%);
    filter: blur(18px);
    z-index: -1;
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 4px;
    color: #fff;
}

/* 首页 Banner 内的统计标签必须保持白色（后面的通用 .stat-label 灰色规则会覆盖它） */
.banner-stats .stat-label {
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    opacity: 1;
}

/* ========================================
   软件介绍区域（核心功能页）
   ======================================== */
.software-intro {
    padding: 32px 0;
    background: var(--bg-white);
}

.software-intro .intro-image {
    text-align: center;
    margin-bottom: 40px;
}

.software-intro .intro-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    display: inline-block;
}

.software-intro .intro-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-indent: 2em;
}

.software-intro .intro-text p:last-child {
    margin-bottom: 0;
}

/* ========================================
   页面Banner（内页）
   ======================================== */
.page-banner {
    padding: 24px 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: #fff;
    text-align: center;
}

.page-banner h1 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 12px;
}

.page-banner p {
    font-size: 18px;
    opacity: 0.9;
}

.banner-download-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 16px;
}

.banner-download-buttons .btn-lg {
    padding: 10px 28px;
    font-size: 15px;
    font-weight: 700;
    border-radius: 6px;
    border: none;
    color: #fff;
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    box-shadow: 0 3px 10px rgba(255, 107, 53, 0.4);
    transition: all 0.3s ease;
}

.banner-download-buttons .btn-lg:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 107, 53, 0.5);
    background: linear-gradient(135deg, #ff7b45 0%, #ffa32e 100%);
}

@media (max-width: 768px) {
    .banner-download-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .banner-download-buttons .btn-lg {
        width: 100%;
        max-width: 280px;
    }
}

/* ========================================
   软件介绍（左右结构）
   ======================================== */
.software-intro {
    padding: 20px 0;
    background: var(--bg-white);
}

.intro-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.intro-image img {
    width: auto;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.intro-content {
    background-color: #E3F2FD;
    padding: 24px 32px;
    border-radius: 12px;
}

.intro-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.intro-content p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    text-indent: 2em;
    text-align: left;
}

.intro-content p:last-child {
    margin-bottom: 0;
}

/* ========================================
   痛点区域
   ======================================== */
.pain-section {
    padding: 32px 0;
    background: var(--bg-white);
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.pain-card {
    padding: 32px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.pain-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.pain-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.pain-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.pain-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   功能卡片
   ======================================== */
.feature-preview {
    padding: 32px 0;
    background: var(--bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 32px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon {
    font-size: 44px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========================================
   软件截图
   ======================================== */
.screenshot-section {
    padding: 32px 0;
    background: var(--bg-white);
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.screenshot-item {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.screenshot-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.screenshot-placeholder {
    height: 180px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.screenshot-icon {
    font-size: 48px;
}

.screenshot-label {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
}

/* ========================================
   首页更新动态
   ======================================== */
/* 首页截图卡片：图区固定高 + 白底标签栏，与 emoji 占位卡同构，保证网格等高 */
.screenshot-media {
    height: 180px;
    overflow: hidden;
    background: #f1f5f9;
}

.screenshot-img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.screenshot-caption {
    padding: 14px 12px;
    background: var(--bg-white);
    text-align: center;
}

/* 超长标题单行省略，防止撑破卡片 */
.screenshot-caption .screenshot-label {
    display: block;
    max-width: 100%;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.screenshot-item:hover .screenshot-img {
    transform: scale(1.04);
}

/* 首页截图轮播：左右箭头切换，网格位移展示 */
.shot-carousel {
    position: relative;
}

.shot-carousel .screenshot-grid {
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.shot-carousel .screenshot-grid::-webkit-scrollbar {
    display: none;
}

.shot-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--bg-white);
    color: var(--primary-blue);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 3;
}

.shot-prev { left: -14px; }
.shot-next { right: -14px; }

.shot-arrow:hover {
    background: var(--primary-blue);
    color: #fff;
    box-shadow: var(--shadow-lg);
}

.shot-prev:hover { transform: translateY(-50%) translateX(-3px); }
.shot-next:hover { transform: translateY(-50%) translateX(3px); }

@media (max-width: 768px) {
    .shot-arrow { display: none; }

    /* 软件介绍移动端适配 */
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .intro-image {
        order: -1;
    }

    .intro-content h2 {
        font-size: 24px;
    }

    .intro-content p {
        font-size: 15px;
    }
}

/* 图片灯箱（点击放大） */
.screenshot-media:has(img[data-lightbox]) {
    cursor: zoom-in;
}

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.lightbox.show {
    opacity: 1;
}

.lightbox-inner {
    max-width: min(1100px, 92vw);
    max-height: 88vh;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    transform: scale(0.96);
    transition: transform 0.25s ease;
}

.lightbox.show .lightbox-inner {
    transform: scale(1);
}

.lightbox-inner img {
    max-width: 100%;
    max-height: calc(88vh - 60px);
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45);
    background: var(--bg-white);
}

.lightbox-inner figcaption {
    color: #fff;
    font-size: 15px;
    text-align: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 26px;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* 灯箱左右切换箭头与计数 */
.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 52px;
    height: 52px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 2;
}

.lightbox-prev { left: 26px; }
.lightbox-next { right: 26px; }

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.28);
}

.lightbox-prev:hover { transform: translateY(-50%) translateX(-3px); }
.lightbox-next:hover { transform: translateY(-50%) translateX(3px); }

.lightbox-count {
    position: absolute;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    font-size: 14px;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .lightbox-nav { width: 40px; height: 40px; font-size: 18px; }
    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }
}

.home-update-section {
    padding: 32px 0;
    background: var(--bg-white);
}

.home-update-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.home-update-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.home-update-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    border-color: var(--primary-light, #bcd0f5);
}

.home-update-date {
    flex-shrink: 0;
    width: 72px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark, #16336b));
    color: #fff;
    border-radius: var(--radius);
    padding: 10px 6px;
    line-height: 1.3;
}

.home-update-date .ud-day {
    display: block;
    font-size: 22px;
    font-weight: 700;
}

.home-update-date .ud-month {
    display: block;
    font-size: 12px;
    opacity: 0.85;
}

.home-update-body { min-width: 0; }

.home-update-version {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.home-update-summary {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .home-update-section { padding: 24px 0; }
    .home-update-item { padding: 16px; gap: 14px; }
    .home-update-summary { white-space: normal; }
}

/* ========================================
   软件功能界面图
   ======================================== */
.interface-screenshots {
    padding: 32px 0;
    background: var(--bg);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* 第1行：修改E站产品(764px) + 优质产品名称(762px) → 以762px为基准 */
.screenshots-grid > div:nth-child(1),
.screenshots-grid > div:nth-child(2) {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.screenshots-grid > div:nth-child(1):hover,
.screenshots-grid > div:nth-child(2):hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.screenshots-grid > div:nth-child(1) img,
.screenshots-grid > div:nth-child(2) img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: top center;
}

/* 第2行：发布E站产品(762px) + 店铺产品销量(752px) → 以752px为基准 */
.screenshots-grid > div:nth-child(3),
.screenshots-grid > div:nth-child(4) {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.screenshots-grid > div:nth-child(3):hover,
.screenshots-grid > div:nth-child(4):hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.screenshots-grid > div:nth-child(3) img,
.screenshots-grid > div:nth-child(4) img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: top center;
}

/* 第3行：产品搬家(556px) + 图片银行(729px) → 以556px为基准 */
.screenshots-grid > div:nth-child(5),
.screenshots-grid > div:nth-child(6) {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.screenshots-grid > div:nth-child(5):hover,
.screenshots-grid > div:nth-child(6):hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.screenshots-grid > div:nth-child(5) img,
.screenshots-grid > div:nth-child(6) img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: top center;
}

/* 第4行：热销产品(516px) + 邮箱营销(555px) → 以516px为基准 */
.screenshots-grid > div:nth-child(7),
.screenshots-grid > div:nth-child(8) {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.screenshots-grid > div:nth-child(7):hover,
.screenshots-grid > div:nth-child(8):hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.screenshots-grid > div:nth-child(7) img,
.screenshots-grid > div:nth-child(8) img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: top center;
}

/* 第5行：产品工具箱(485px) + 打造爆款(478px) → 以478px为基准 */
.screenshots-grid > div:nth-child(9),
.screenshots-grid > div:nth-child(10) {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.screenshots-grid > div:nth-child(9):hover,
.screenshots-grid > div:nth-child(10):hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.screenshots-grid > div:nth-child(9) img,
.screenshots-grid > div:nth-child(10) img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    object-position: top center;
}

/* 通用容器样式（所有screenshot-item） */
.screenshots-grid > div {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: #fff;
}
.screenshots-grid > div:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

@media (max-width: 768px) {
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* ========================================
   客户评价
   ======================================== */
.testimonial-section {
    padding: 32px 0;
    background: var(--bg);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    padding: 32px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
}

.testimonial-stars {
    font-size: 18px;
    margin-bottom: 16px;
}

.testimonial-content {
    font-size: 15px;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 24px;
    min-height: 120px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
}

.author-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.author-company {
    font-size: 13px;
    color: var(--text-light);
}

/* ========================================
   价格卡片
   ======================================== */
.price-preview {
    padding: 32px 0;
    background: var(--bg-white);
}

.price-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    align-items: stretch;
    max-width: 800px;
    margin: 0 auto;
}

.price-card {
    padding: 36px 28px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    text-align: center;
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.price-card.hot {
    border-color: var(--primary);
    background: linear-gradient(180deg, #eff6ff 0%, var(--bg-white) 100%);
    transform: scale(1.03);
}

.hot-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: linear-gradient(135deg, var(--accent), #f97316);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
}

.price-header h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.price-num {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
    margin: 20px 0;
}

.price-num span {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-light);
}

.price-features {
    text-align: left;
    margin-bottom: 28px;
    flex: 1;
}

.price-features li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.price-features li:last-child {
    border-bottom: none;
}

.price-features li.disabled {
    color: var(--text-lighter);
    text-decoration: line-through;
}

/* ========================================
   FAQ
   ======================================== */
.faq-preview {
    padding: 32px 0;
    background: var(--bg);
}

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

.faq-item {
    margin-bottom: 16px;
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow);
}

.faq-question {
    display: flex;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    gap: 12px;
}

.faq-q {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-question h3 {
    flex: 1;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.faq-toggle {
    font-size: 20px;
    color: var(--text-light);
    transition: var(--transition);
}

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

.faq-answer {
    display: none;
    padding: 0 24px 20px 64px;
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    display: block;
}

/* ========================================
   CTA区域
   ======================================== */
.cta-section {
    padding: 32px 0;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    right: -80px;
    top: -120px;
    width: 340px;
    height: 340px;
    background: radial-gradient(circle at center, rgba(255,255,255,0.14), transparent 70%);
    pointer-events: none;
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
}

.cta-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.cta-content p {
    font-size: 17px;
    color: rgba(255,255,255,0.85);
}

.cta-buttons {
    display: flex;
    gap: 16px;
    flex-shrink: 0;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 24px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    color: #94a3b8;
}

.footer-col ul li a:hover {
    color: #fff;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 12px;
}

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid #1e293b;
    text-align: center;
    font-size: 14px;
}

/* ========================================
   悬浮客服
   ======================================== */
.float-service {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 悬浮客服：圆钮（竖长条，与面板同宽） */
.float-toggle {
    width: 52px;
    height: 76px;
    border-radius: 10px;
    background: linear-gradient(180deg, var(--primary-dark), var(--primary));
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, .28);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.float-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(37, 99, 235, .38);
}

.float-toggle-icon {
    font-size: 18px;
    line-height: 1;
}

.float-toggle-text {
    font-size: 10px;
    line-height: 1.3;
    letter-spacing: .5px;
    text-align: center;
    opacity: .95;
}

/* 悬浮客服：窄版竖排面板（向左弹出，不超出屏幕右缘） */
.float-panel {
    position: absolute;
    right: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%) translateX(10px);
    width: 172px;
    max-height: 82vh;
    overflow-y: auto;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, .16);
    padding: 26px 12px 12px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
}

.float-service.open .float-panel {
    transform: translateY(-50%) translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.float-panel-close {
    position: absolute;
    right: 4px;
    top: 2px;
    width: 20px;
    height: 20px;
    line-height: 18px;
    text-align: center;
    border-radius: 50%;
    font-size: 15px;
    color: var(--text-lighter);
    cursor: pointer;
    transition: var(--transition);
}

.float-panel-close:hover {
    color: var(--danger);
    background: #fef2f2;
}

.fp-head {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 26px;
    line-height: 26px;
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #fff;
    text-align: center;
    background: linear-gradient(180deg, var(--primary-dark), var(--primary));
    border-radius: 12px 12px 0 0;
}

.fp-block {
    text-align: center;
    padding-bottom: 9px;
    margin-bottom: 9px;
    border-bottom: 1px dashed var(--border);
}

.fp-block:last-of-type {
    border-bottom: none;
    margin-bottom: 4px;
    padding-bottom: 0;
}

.fp-title {
    font-size: 11px;
    color: var(--text-light);
    margin-bottom: 3px;
}

.fp-num {
    font-size: 15px;
    font-weight: 800;
    letter-spacing: .2px;
    color: #e02d2d;
    line-height: 1.35;
    word-break: break-all;
}

.fp-qq {
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.45;
    word-break: break-all;
}

.fp-sub {
    margin-top: 2px;
    font-size: 10px;
    color: var(--text-lighter);
}

.fp-qr img {
    width: 104px;
    height: 104px;
    display: block;
    margin: 0 auto;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
}

.fp-time {
    text-align: center;
    font-size: 10px;
    line-height: 1.7;
    color: var(--text-lighter);
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

/* 兼容旧节点（其它页面若仍引用） */
.float-item {
    width: 52px;
    height: 52px;
    background: var(--bg-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

.float-item:hover {
    background: var(--primary);
    transform: scale(1.1);
}

/* ========================================
   功能详情页
   ======================================== */
.function-overview {
    padding: 24px 0;
    background: var(--bg-white);
}

.function-categories {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.category-item {
    padding: 12px 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
}

.category-item:hover,
.category-item.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.function-detail {
    padding: 24px 0 32px;
    background: var(--bg);
}

.function-block {
    margin-bottom: 24px;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.block-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border);
}

.block-icon {
    font-size: 40px;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.block-header h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
}

.function-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.function-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.function-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
}

.item-icon {
    font-size: 32px;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--bg-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.item-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.item-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 显示更多按钮 */
.show-more-wrapper {
    text-align: center;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px dashed #e5e7eb;
}

.btn-show-more {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 8px 24px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-show-more:hover {
    background: var(--primary);
    color: #fff;
}

.btn-show-more.expanded {
    background: var(--primary);
    color: #fff;
}

.bottom-cta {
    padding: 32px 0;
    background: var(--bg);
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    border-radius: var(--radius-xl);
    padding: 60px;
    text-align: center;
    color: #fff;
}

.cta-box h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-box p {
    font-size: 17px;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* 居中类 CTA 卡片（核心功能页 .cta-box / 更新日志页 .update-cta-box）：按钮组随文案居中 */
.cta-box .cta-buttons,
.update-cta-box .cta-buttons {
    justify-content: center;
}

.update-cta-box > a.btn {
    display: inline-flex;
}

/* ========================================
   价格详情页
   ======================================== */
.price-section {
    padding: 32px 0;
    background: var(--bg);
}

.price-grid-large {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: stretch;
}

.price-card-large {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border);
    padding: 44px 36px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--transition);
}

.price-card-large .price-card-header h3 {
    font-size: 26px;
}

.price-card-large .price-card-header p {
    font-size: 15px;
}

.price-card-large .price-card-price {
    margin: 30px 0;
}

.price-card-large .price-card-features li {
    padding: 13px 0;
    font-size: 15px;
}

/* 三档套餐：权益条数不等，用弹性间隔把按钮推到卡片底部对齐 */
.price-card-large .price-card-features {
    margin-bottom: 0;
}

.price-card-large .btn-block {
    margin-top: auto;
}

/* 联系方式：仅显示号码，不提供点击直连 */
.contact-plain {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text);
}

.contact-note {
    margin-top: 4px;
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--text-lighter);
}

/* 悬浮客服：圆钮、面板与回到顶部按钮 */
.float-service a.float-item,
.float-service .float-toggle {
    cursor: pointer;
}

.float-service div.float-item {
    cursor: help;
}

.price-card-large:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.price-card-large.hot {
    border-color: var(--primary);
    background: linear-gradient(180deg, #eff6ff 0%, var(--bg-white) 30%);
}

.hot-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: linear-gradient(135deg, var(--accent), #f97316);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border-radius: 50px;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

.price-card-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.price-card-header p {
    font-size: 14px;
    color: var(--text-light);
}

.price-card-price {
    margin: 24px 0;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.price-card-price .currency {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
}

.price-card-price .amount {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.price-card-price .period {
    font-size: 16px;
    color: var(--text-light);
    margin-left: 4px;
}

/* 多周期价格（如 ¥899/半年 + ¥1680/一年） */
.price-card-price.multi {
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.price-card-price .price-line {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.price-card-price.multi .amount {
    font-size: 38px;
}

.price-card-price.multi .currency {
    font-size: 20px;
}

.price-card-features {
    flex: 1;
    margin-bottom: 28px;
}

.price-card-features li {
    padding: 10px 0;
    font-size: 14px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.price-card-features li:last-child {
    border-bottom: none;
}

.license-section {
    padding: 30px 0;
    background: var(--bg-white);
}

.license-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.license-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.license-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.license-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.license-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.buy-process {
    padding: 30px 0;
    background: var(--bg);
}

.process-steps {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
}

.step-item {
    flex: 1;
    max-width: 200px;
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.step-num {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin: 0 auto 12px;
}

.step-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.step-content p {
    font-size: 13px;
    color: var(--text-light);
}

.step-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-light);
    padding: 0 8px;
}

.notice-section {
    padding: 16px 0 24px;
    background: var(--bg-white);
}

.notice-box {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent);
}

.notice-box h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.notice-box p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 10px;
}

/* ========================================
   下载页
   ======================================== */
.download-hero {
    position: relative;
    padding: 24px 0 32px;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #3b82f6 100%);
    color: #fff;
    overflow: hidden;
}

.download-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.2) 0%, transparent 50%);
}

.download-hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.download-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    font-size: 14px;
    margin-bottom: 20px;
}

.download-hero-content h1 {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.download-hero-content h1 span {
    background: linear-gradient(90deg, #60a5fa, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-desc {
    font-size: 18px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 32px;
}

.download-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.btn-icon {
    font-size: 18px;
}

.download-meta {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    opacity: 0.85;
}

/* 软件界面模拟 */
.software-mockup {
    background: #1e293b;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.1);
}

.mockup-header {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: #334155;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.mockup-dots {
    display: flex;
    gap: 6px;
    margin-right: 12px;
}

.mockup-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.mockup-dots span:nth-child(1) { background: #ef4444; }
.mockup-dots span:nth-child(2) { background: #f59e0b; }
.mockup-dots span:nth-child(3) { background: #10b981; }

.mockup-title {
    font-size: 13px;
    color: #94a3b8;
}

.mockup-body {
    display: flex;
    min-height: 320px;
}

.mockup-sidebar {
    width: 140px;
    background: #0f172a;
    padding: 16px 12px;
}

.mockup-menu {
    padding: 10px 12px;
    font-size: 13px;
    color: #94a3b8;
    border-radius: 8px;
    margin-bottom: 4px;
}

.mockup-menu.active {
    background: var(--primary);
    color: #fff;
}

.mockup-main {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mockup-card {
    background: #1e293b;
    border-radius: 10px;
    padding: 16px;
    border: 1px solid rgba(255,255,255,0.05);
}

.mockup-card-title {
    font-size: 13px;
    color: #e2e8f0;
    font-weight: 600;
    margin-bottom: 12px;
}

.mockup-progress {
    height: 8px;
    background: #334155;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.mockup-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-light), var(--secondary));
    border-radius: 4px;
}

.mockup-stats {
    display: flex;
    justify-content: space-between;
}

.mockup-stats div {
    text-align: center;
}

.mockup-stats strong {
    display: block;
    font-size: 18px;
    color: #fff;
}

.mockup-stats span {
    font-size: 11px;
    color: #64748b;
}

.mockup-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.mockup-tags span {
    padding: 4px 10px;
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border-radius: 4px;
    font-size: 12px;
}

/* 系统要求 */
.system-requirements {
    padding: 32px 0;
    background: var(--bg-white);
}

.req-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.req-card {
    padding: 32px 24px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

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

.req-icon {
    font-size: 44px;
    margin-bottom: 16px;
}

.req-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.req-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.important-notice {
    display: flex;
    gap: 20px;
    padding: 24px 28px;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-lg);
    align-items: flex-start;
}

.notice-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.notice-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: #92400e;
    margin-bottom: 6px;
}

.notice-content p {
    font-size: 14px;
    color: #78350f;
    line-height: 1.7;
}

/* 试用说明 */
.trial-section {
    padding: 32px 0;
    background: var(--bg);
}

.trial-box {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 50px;
    box-shadow: var(--shadow);
}

.trial-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 2px solid var(--border);
}

.trial-highlight {
    text-align: center;
}

.highlight-num {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
}

.highlight-label {
    font-size: 15px;
    color: var(--text-light);
}

.trial-rules h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text);
}

.trial-rules ol {
    list-style: decimal;
    padding-left: 24px;
}

.trial-rules li {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 10px;
}

/* 安装步骤 */
.install-steps {
    padding: 32px 0;
    background: var(--bg-white);
}

.install-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.install-step {
    text-align: center;
    padding: 36px 24px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    position: relative;
    transition: var(--transition);
}

.install-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.4);
}

.install-step .step-icon {
    font-size: 44px;
    margin: 16px 0;
}

.install-step h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.install-step p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.download-cta {
    padding: 32px 0;
    background: var(--bg);
}

.download-cta-box {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0f172a 0%, var(--primary-dark) 45%, var(--primary) 100%);
    border-radius: var(--radius-xl);
    padding: 64px 60px 52px;
    text-align: center;
    color: #fff;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.35);
}

.dcta-glow {
    position: absolute;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    width: 420px;
    height: 260px;
    background: radial-gradient(ellipse at center, rgba(96, 165, 250, 0.4), transparent 70%);
    pointer-events: none;
}

.dcta-badge {
    position: relative;
    display: inline-block;
    padding: 7px 18px;
    margin-bottom: 18px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: #fde68a;
    background: rgba(253, 230, 138, 0.1);
    border: 1px solid rgba(253, 230, 138, 0.35);
    border-radius: 999px;
}

.dcta-tags {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 26px;
    margin-top: 26px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
}

.dcta-tags span {
    transition: var(--transition);
}

.dcta-tags span:hover {
    color: #fff;
    transform: translateY(-1px);
}

/* 下载页大卡片：按钮与整卡居中文案对齐，主副按钮同宽成组 */
.download-cta-box .cta-buttons {
    position: relative;
    justify-content: center;
    gap: 18px;
}

.download-cta-box .cta-buttons .btn {
    min-width: 200px;
    justify-content: center;
}

.download-cta-box h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.download-cta-box p {
    font-size: 17px;
    opacity: 0.85;
    margin-bottom: 30px;
}

.cta-contact {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    opacity: 0.8;
}

/* ========================================
   案例页
   ======================================== */
.case-stats {
    padding: 32px 0;
    background: var(--bg-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-card {
    text-align: center;
    padding: 32px 24px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: var(--radius-lg);
}

.stat-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: var(--text-light);
}

.case-list {
    padding: 32px 0;
    background: var(--bg);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.case-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.case-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
}

.case-info h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
}

.case-info p {
    font-size: 13px;
    color: var(--text-light);
}

.case-stars {
    margin-left: auto;
    font-size: 14px;
}

.case-content {
    font-size: 14px;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 24px;
    min-height: 130px;
}

.case-results {
    display: flex;
    justify-content: space-around;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.result-item {
    text-align: center;
}

.result-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--success);
    margin-bottom: 2px;
}

.result-label {
    font-size: 12px;
    color: var(--text-light);
}

.industry-section {
    padding: 32px 0;
    background: var(--bg-white);
}

.industry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    max-width: 900px;
    margin: 0 auto;
}

.industry-tag {
    padding: 10px 22px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 15px;
    color: var(--text);
    transition: var(--transition);
}

.industry-tag:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ========================================
   关于页
   ======================================== */
.about-intro {
    padding: 32px 0;
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text);
}

.about-content p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-card {
    padding: 48px 32px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-xl);
    text-align: center;
    color: #fff;
}

.about-card-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.about-card p {
    font-size: 16px;
    opacity: 0.9;
    letter-spacing: 2px;
}

.about-values {
    padding: 32px 0;
    background: var(--bg);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.value-card {
    padding: 36px 28px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.value-icon {
    font-size: 44px;
    margin-bottom: 16px;
}

.value-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.value-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 时间线 */
.about-timeline {
    padding: 32px 0;
    background: var(--bg-white);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 32px;
    position: relative;
}

.timeline-year {
    width: 80px;
    flex-shrink: 0;
    text-align: right;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    padding-top: 4px;
}

.timeline-content {
    flex: 1;
    padding: 24px 28px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -46px;
    top: 28px;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--bg-white);
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.about-team {
    padding: 32px 0;
    background: var(--bg);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    padding: 32px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border);
}

.team-icon {
    font-size: 44px;
    margin-bottom: 16px;
}

.team-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.team-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.about-contact {
    padding: 32px 0;
    background: var(--bg-white);
}

.contact-box {
    max-width: 1000px;
    margin: 0 auto;
    padding: 50px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: var(--radius-xl);
    text-align: center;
}

.contact-box h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.contact-box > p {
    font-size: 17px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 30px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: left;
}

.contact-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.contact-info-item h4 {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 2px;
}

.contact-info-item p {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

.contact-worktime {
    padding-top: 24px;
    border-top: 1px solid rgba(30, 64, 175, 0.1);
}

.contact-worktime p {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 6px;
}

.worktime-note {
    font-size: 13px !important;
    color: var(--text-light) !important;
}

/* ========================================
   联系页
   ======================================== */
.contact-section {
    padding: 32px 0;
    background: var(--bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
}

.contact-form-box {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.contact-form-box h2 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.contact-form-box > p {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 28px;
}

.form-success {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.success-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.form-success h4 {
    font-size: 16px;
    font-weight: 600;
    color: #065f46;
    margin-bottom: 4px;
}

.form-success p {
    font-size: 14px;
    color: #047857;
    line-height: 1.6;
}

.form-error {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 14px;
    color: #991b1b;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.required {
    color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text);
    background: var(--bg-white);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-info-col {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-box {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 36px;
    box-shadow: var(--shadow-sm);
}

.contact-info-box h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.contact-desc {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 28px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.contact-item:last-of-type {
    border-bottom: none;
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-item-content h4 {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 2px;
}

.contact-item-content p {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.contact-worktime {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 2px solid var(--border);
}

.contact-worktime h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.contact-worktime p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.worktime-note {
    font-size: 13px !important;
    color: var(--text-lighter) !important;
    margin-top: 8px !important;
}

.contact-quick-box {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-xl);
    padding: 36px;
    color: #fff;
    text-align: center;
}

.contact-quick-box h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-quick-box p {
    font-size: 15px;
    opacity: 0.9;
    margin-bottom: 24px;
}

.qr-placeholder {
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 32px 24px;
    backdrop-filter: blur(10px);
}

.qr-icon {
    font-size: 56px;
    display: block;
    margin-bottom: 12px;
}

.qr-placeholder p {
    font-size: 14px;
    margin-bottom: 4px;
    opacity: 0.95;
}

.qr-tip {
    font-size: 13px !important;
    opacity: 0.7 !important;
}

/* ========================================
   在线客服页（contact.php）
   ======================================== */
.service-section {
    padding: 32px 0;
    background: var(--bg);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: stretch;
}

.service-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    padding: 36px 30px;
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 14px;
}

.service-num {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: 1px;
    color: #e02d2d;
    line-height: 1.2;
    margin-bottom: 18px;
}

.service-num.qq {
    font-size: 22px;
    letter-spacing: .5px;
    color: var(--primary);
}

.service-meta {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    text-align: left;
    background: var(--bg);
    border-radius: var(--radius);
    padding: 14px 18px;
}

.service-meta li {
    font-size: 14px;
    color: var(--text-light);
    line-height: 2;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.service-meta li span {
    color: var(--text);
    font-weight: 600;
    text-align: right;
}

.service-card .btn-block {
    margin-top: auto;
    cursor: default;
}

.service-tip {
    margin-top: 12px;
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--text-lighter);
}

.service-qr {
    margin-bottom: 18px;
}

.service-qr-frame {
    width: 190px;
    height: 190px;
    margin: 0 auto;
    padding: 8px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.service-qr-frame img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.qr-caption {
    margin-top: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.service-actions {
    margin-top: 48px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-green {
    background: linear-gradient(135deg, #16a34a, #22c55e);
    color: #fff;
    border-color: transparent;
}

.btn-green:hover {
    background: linear-gradient(135deg, #15803d, #16a34a);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(22, 163, 74, .3);
}

.btn-blue {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    border-color: transparent;
}

.btn-blue:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(37, 99, 235, .3);
}

/* 试用说明模块 */
.trial-section {
    padding: 24px 0 10px;
    background: var(--bg-white);
}

.trial-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.trial-content h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    position: relative;
    display: inline-block;
}

.trial-content h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.trial-content ol {
    list-style: decimal;
    padding-left: 20px;
    margin-top: 32px;
}

.trial-content li {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.trial-content li strong {
    color: #e53e3e;
    font-weight: 600;
}

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

@media (max-width: 768px) {
    .trial-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .trial-image {
        order: -1;
    }

    .trial-image img {
        max-width: 100%;
    }
}

/* 重要提示 */
.important-notice-section {
    padding: 20px 0;
    background: #fffbeb;
}

.important-notice-box {
    background: var(--bg-white);
    border: 2px solid #f59e0b;
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
}

.important-notice-box h3 {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: #d97706;
    margin-bottom: 20px;
}

.important-notice-box p {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
    margin-bottom: 12px;
}

.important-notice-box p:last-child {
    margin-bottom: 0;
}

.important-notice-box a:hover {
    color: #2563eb;
}

@media (max-width: 768px) {
    .important-notice-box {
        padding: 24px;
    }

    .important-notice-box h3 {
        font-size: 18px;
    }

    .important-notice-box p {
        font-size: 15px;
    }
}

/* 购买方式 */
.purchase-methods {
    padding: 30px 0;
    background: var(--bg-white);
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.method-card {
    padding: 32px 24px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

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

.method-icon {
    font-size: 44px;
    margin-bottom: 16px;
}

.method-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.method-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.purchase-notice {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 28px;
    background: #eff6ff;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
}

.purchase-notice p {
    font-size: 15px;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 8px;
}

.purchase-notice p:last-child {
    margin-bottom: 0;
}

/* ========================================
   更新日志
   ======================================== */
.update-section {
    padding: 32px 0;
    background: var(--bg);
}

.update-latest {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px 40px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-xl);
    color: #fff;
    margin-bottom: 50px;
}

.latest-badge {
    padding: 8px 20px;
    background: var(--accent);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.latest-info {
    flex: 1;
}

.latest-info h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.latest-info p {
    font-size: 15px;
    opacity: 0.85;
}

.update-timeline {
    position: relative;
    padding-left: 40px;
}

.update-timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.update-item {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    position: relative;
}

.update-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 24px;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--bg);
}

.update-date {
    width: 80px;
    flex-shrink: 0;
    text-align: center;
    padding: 12px 8px;
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    height: fit-content;
}

.date-day {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.date-month {
    display: block;
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.update-content {
    flex: 1;
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 24px 28px;
    border: 1px solid var(--border);
}

.update-version {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 14px;
}

.update-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 6px 0;
    font-size: 15px;
    color: var(--text-light);
}

.update-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary-light);
    border-radius: 50%;
    margin-top: 9px;
    flex-shrink: 0;
}

.update-list li.new::before { background: var(--success); }
.update-list li.optimize::before { background: var(--accent); }
.update-list li.fix::before { background: var(--danger); }

.update-legend {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-dot.new { background: var(--success); }
.legend-dot.optimize { background: var(--accent); }
.legend-dot.fix { background: var(--danger); }

.update-cta {
    padding: 32px 0;
    background: var(--bg-white);
}

.update-cta-box {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding: 50px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-xl);
    color: #fff;
}

.update-cta-box h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.update-cta-box p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 28px;
}

/* ========================================
   教程页（重设计版）
   ======================================== */

/* 沉浸式横幅 */
.tut-hero {
    background: linear-gradient(135deg, #0f2461 0%, #1e3a8a 45%, #2563eb 100%);
    color: #fff;
    padding: 24px 0 32px;
    position: relative;
    overflow: hidden;
}

.tut-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255,255,255,0.09) 1.5px, transparent 1.5px);
    background-size: 26px 26px;
    pointer-events: none;
}

.tut-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 48px;
    position: relative;
}

.tut-hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid rgba(255,255,255,0.35);
    border-radius: 50px;
    font-size: 13px;
    letter-spacing: 1px;
    background: rgba(255,255,255,0.08);
    margin-bottom: 18px;
}

.tut-hero-text h1 {
    font-size: 40px;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 14px;
}

.tut-hero-text > p {
    font-size: 16px;
    color: rgba(255,255,255,0.82);
    line-height: 1.8;
    max-width: 520px;
}

.tut-hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 30px;
}

.th-stat strong {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: #ffd66b;
    line-height: 1.2;
}

.th-stat span {
    font-size: 13px;
    color: rgba(255,255,255,0.72);
}

/* 横幅右侧装饰插画（纯 CSS 播放器造型） */
.tut-hero-art {
    position: relative;
    height: 250px;
}

.tha-frame {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-2deg);
    width: 88%;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.28);
    border-radius: 14px;
    backdrop-filter: blur(6px);
    box-shadow: 0 24px 60px rgba(0,0,0,0.35);
    padding: 14px 18px 22px;
}

.tha-bar {
    display: flex;
    gap: 6px;
    margin-bottom: 18px;
}

.tha-bar i {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
}

.tha-play {
    width: 54px;
    height: 54px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: #fff;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    animation: tha-pulse 2.4s ease-out infinite;
}

@keyframes tha-pulse {
    0% { box-shadow: 0 0 0 0 rgba(255,255,255,0.45); }
    70% { box-shadow: 0 0 0 18px rgba(255,255,255,0); }
    100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}

.tha-line {
    height: 9px;
    border-radius: 5px;
    background: rgba(255,255,255,0.28);
    margin-bottom: 10px;
}

.tha-line.w1 { width: 82%; }
.tha-line.w2 { width: 64%; }
.tha-line.w3 { width: 72%; margin-bottom: 0; }

.tha-chip {
    position: absolute;
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 13px;
    background: #fff;
    color: var(--text);
    box-shadow: 0 10px 26px rgba(0,0,0,0.25);
    animation: tha-float 3.6s ease-in-out infinite;
}

.tha-chip-1 { top: 8px; right: 4px; }
.tha-chip-2 { bottom: 12px; left: 0; animation-delay: 1.6s; }

@keyframes tha-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.tutorial-section {
    padding: 34px 0 48px;
    background: var(--bg);
}

/* 吸顶分类栏 */
.tutorial-categories {
    position: sticky;
    top: 64px;
    z-index: 20;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: -58px auto 28px;
    flex-wrap: wrap;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 8px;
    width: fit-content;
    max-width: 100%;
    box-shadow: 0 10px 30px rgba(15,36,97,0.1);
}

.tut-cat-btn {
    padding: 9px 20px;
    background: transparent;
    border: none;
    border-radius: 50px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

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

.tcb-num {
    font-size: 11px;
    line-height: 1;
    padding: 3px 7px;
    border-radius: 10px;
    background: #eff1f5;
    color: var(--text-light);
}

.tut-cat-btn.active {
    background: linear-gradient(135deg, var(--primary), #2563eb);
    color: #fff;
    box-shadow: 0 6px 16px rgba(37,99,235,0.35);
}

.tut-cat-btn.active .tcb-num {
    background: rgba(255,255,255,0.22);
    color: #fff;
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    /* 翻页滚动时让出吸顶分类栏的高度，避免被遮挡后浏览器二次校正产生跳动 */
    scroll-margin-top: 136px;
}

.tutorial-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
}

.tutorial-link {
    display: flex;
    flex-direction: column;
    width: 100%;
    color: inherit;
}

.tutorial-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.tutorial-cover img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.tutorial-card:hover .tutorial-cover img {
    transform: scale(1.06);
}

.cover-placeholder {
    text-align: center;
}

.cover-icon {
    font-size: 44px;
    opacity: 0.85;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    transition: var(--transition);
}

.tutorial-card:hover .play-btn {
    transform: translate(-50%, -50%) scale(1.12);
    background: var(--primary);
    color: #fff;
}

.tutorial-info {
    padding: 10px 14px 12px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.tutorial-info h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.45;
    height: 43px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.tutorial-card:hover .tutorial-info h3 {
    color: var(--primary);
}

.tutorial-info > p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
    height: 42px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
}

.tutorial-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 7px;
    border-top: 1px solid #f1f5f9;
}

.meta-tag {
    padding: 3px 10px;
    background: #eff6ff;
    color: var(--primary);
    font-size: 12px;
    border-radius: 4px;
}

.meta-views {
    font-size: 12px;
    color: var(--text-lighter);
}

.tutorial-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 34px;
}

.page-btn {
    min-width: 72px;
    height: 40px;
    padding: 0 16px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-btn:disabled:hover {
    background: var(--bg-white);
    color: var(--text);
    border-color: var(--border);
}

.page-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    color: var(--text-lighter);
    font-size: 14px;
    user-select: none;
}

.tutorial-empty {
    display: block;
    text-align: center;
    padding: 32px 0;
    color: var(--text-light);
    font-size: 15px;
}

/* hidden 属性必须生效（JS 靠它控制空提示显隐，防止被上面的 display:block 覆盖） */
[hidden] {
    display: none !important;
}

.tutorial-tips {
    padding: 0 0 56px;
    background: var(--bg);
}

.tips-box {
    max-width: 960px;
    margin: 0 auto;
    padding: 30px 36px;
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent);
}

.tips-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.tips-icon {
    font-size: 28px;
    line-height: 1;
}

.tips-head h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text);
}

.tips-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 36px;
}

.tips-list li {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.tips-list li b {
    font-size: 15px;
    font-weight: 800;
    color: var(--accent);
    font-style: italic;
    flex-shrink: 0;
}

/* ========================================
   视频详情页
   ======================================== */
.video-detail-section {
    padding: 16px 0 32px;
    background: var(--bg);
}

.video-breadcrumb {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 24px;
}

.video-breadcrumb a {
    color: var(--primary);
}

.video-breadcrumb span {
    color: var(--text);
}

.video-detail-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 30px;
}

.video-player-box {
    margin-bottom: 24px;
    /* 播放器固定 16:9 舞台：横屏满幅；竖屏视频 JS 切换 .portrait 变窄幅居中 */
    aspect-ratio: 16 / 9;
    max-height: 60vh;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.video-player-box.portrait {
    aspect-ratio: auto;
    max-width: min(420px, 62%);
    margin: 0 auto 24px;
    height: min(70vh, 640px);
    max-height: 70vh;
}

.video-player-box video,
.video-player-box iframe {
    width: 100%;
    height: 100%;
    display: block;
    border: 0;
}

.video-player {
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.player-placeholder {
    height: 480px;
    background: linear-gradient(135deg, #0f172a, #1e293b);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.player-big-play {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.player-big-play:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: scale(1.1);
}

.player-tip {
    font-size: 16px;
    color: rgba(255,255,255,0.6);
}

.player-controls {
    background: #1e293b;
    padding: 12px 16px;
}

.player-progress {
    margin-bottom: 10px;
}

.progress-bar {
    height: 4px;
    background: #475569;
    border-radius: 2px;
    position: relative;
    cursor: pointer;
}

.progress-filled {
    height: 100%;
    background: var(--primary-light);
    border-radius: 2px;
}

.progress-dot {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.player-buttons {
    display: flex;
    align-items: center;
    gap: 16px;
}

.player-btn {
    background: none;
    border: none;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.player-btn:hover {
    background: rgba(255,255,255,0.1);
}

.player-btn.play {
    font-size: 20px;
}

.player-time {
    font-size: 13px;
    color: #94a3b8;
}

.player-right {
    margin-left: auto;
    display: flex;
    gap: 8px;
}

.video-info-box {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
}

.video-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.4;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.video-meta .meta-item {
    font-size: 14px;
    color: var(--text-light);
}

.video-meta .meta-tag {
    padding: 4px 12px;
    background: #eff6ff;
    color: var(--primary);
    font-size: 13px;
    border-radius: 4px;
}

.video-desc h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.video-desc p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

.video-actions {
    display: flex;
    gap: 12px;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.action-btn {
    padding: 10px 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.action-btn.primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* 视频详情页互动按钮状态 */
.action-btn.done,
.action-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.action-btn:disabled {
    cursor: default;
    opacity: 0.92;
}

.action-btn.act-fav.active {
    background: #f59e0b;
    border-color: #f59e0b;
}

/* 轻提示 toast */
.meoo-toast {
    position: fixed;
    left: 50%;
    bottom: 48px;
    transform: translate(-50%, 16px);
    max-width: 80vw;
    padding: 11px 22px;
    background: rgba(15, 23, 42, 0.88);
    color: #fff;
    font-size: 14px;
    border-radius: 50px;
    box-shadow: 0 10px 30px -8px rgba(2, 6, 23, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 3000;
}

.meoo-toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* 首页 Banner 视频：封面中央大播放按钮 */
.video-frame {
    position: relative;
}

.banner-play-big {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 74px;
    height: 74px;
    border: none;
    border-radius: 50%;
    background: rgba(29, 78, 216, 0.92);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 32px -8px rgba(2, 6, 23, 0.55);
    transition: transform 0.2s ease, background 0.2s ease;
    z-index: 5;
}

.banner-play-big:hover {
    background: var(--primary);
    transform: translate(-50%, -50%) scale(1.08);
}

.banner-play-big .bpb-icon {
    font-size: 26px;
    line-height: 1;
    margin-left: 4px;
}

@keyframes bpbPulse {
    0% { box-shadow: 0 0 0 0 rgba(29, 78, 216, 0.45); }
    70% { box-shadow: 0 0 0 18px rgba(29, 78, 216, 0); }
    100% { box-shadow: 0 0 0 0 rgba(29, 78, 216, 0); }
}

.banner-play-big {
    animation: bpbPulse 2.2s ease-out infinite;
}

.related-videos {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.related-videos h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 20px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.related-card {
    display: block;
}

.related-cover {
    position: relative;
    height: 100px;
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    border-radius: 8px;
    margin-bottom: 8px;
    overflow: hidden;
}

.cover-placeholder-sm {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cover-icon-sm {
    font-size: 28px;
    color: rgba(255,255,255,0.8);
}

.related-duration {
    position: absolute;
    bottom: 6px;
    right: 6px;
    padding: 2px 8px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 11px;
    border-radius: 3px;
}

.related-card h4 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card p {
    font-size: 12px;
    color: var(--text-lighter);
}

/* 侧边栏 */
.video-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-box {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.sidebar-box h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
}

/* 视频详情页侧栏：教程列表 */
.tut-side-list {
    display: flex;
    flex-direction: column;
    max-height: 420px;
    overflow-y: auto;
}

.tut-side-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.tut-side-item:last-child { border-bottom: none; }

.tut-side-item:hover { background: #f1f5f9; }

.tut-side-item.current {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
}

.tut-side-item.current .tut-side-name {
    color: var(--primary);
    font-weight: 600;
}

.tut-side-no {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: #f1f5f9;
    color: var(--text-light);
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tut-side-item.current .tut-side-no {
    background: var(--primary);
    color: #fff;
}

.tut-side-name {
    font-size: 14px;
    color: var(--text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tut-side-more {
    display: block;
    text-align: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--border);
    font-size: 14px;
    color: var(--primary);
}

.tut-side-more:hover { text-decoration: underline; }

.hot-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.hot-item {
    display: flex;
    gap: 12px;
}

.hot-cover {
    width: 100px;
    height: 60px;
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
}

.hot-play {
    font-size: 16px;
    color: rgba(255,255,255,0.8);
}

.hot-info h4 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hot-info p {
    font-size: 12px;
    color: var(--text-lighter);
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
}

.cta-box h3 {
    color: #fff;
}

.cta-box p {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 16px;
}

.cta-contact {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.15);
}

.cta-contact p {
    font-size: 13px;
    margin-bottom: 6px;
    opacity: 0.85;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .pain-grid,
    .testimonial-grid,
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-grid,
    .screenshot-grid,
    .tutorial-grid,
    .req-grid,
    .license-grid,
    .values-grid,
    .team-grid,
    .methods-grid,
    .industry-tags {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .tutorial-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }

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

    /* 三档套餐在窄屏保持一行三列，仅压缩卡片内边距，避免右侧空出 */
    .price-grid-large {
        gap: 14px;
    }

    .price-grid-large .price-card-large {
        padding: 24px 16px;
    }

    .price-grid-large .price-card-header h3 {
        font-size: 17px;
    }

    .price-grid-large .price-card-header p {
        font-size: 12px;
    }

    .price-grid-large .price-card-price {
        margin: 18px 0;
    }

    .price-grid-large .price-card-price .amount {
        font-size: 32px;
    }

    .price-grid-large .price-card-price.multi .amount {
        font-size: 26px;
    }

    .price-grid-large .price-card-features li {
        padding: 9px 0;
        font-size: 12.5px;
    }

    .price-grid-large .hot-badge {
        font-size: 11px;
        padding: 4px 12px;
    }

    .price-grid-large .btn-lg {
        padding: 10px 14px;
        font-size: 13px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-hero-inner,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .video-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .function-list {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .step-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .nav {
        display: none;
    }

    /* 移动端下拉菜单：点汉堡按钮展开（fixed 跟随视口，滚动时不会跑掉） */
    .nav.open {
        display: block;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        z-index: 999;
        animation: navDrop 0.22s ease;
        /* 折叠动画：由 JS 同步设置 height */
        overflow-x: hidden;
        transition: height 0.28s ease, opacity 0.28s ease;
    }

    @keyframes navDrop {
        from { opacity: 0; transform: translateY(-8px); }
        to   { opacity: 1; transform: translateY(0); }
    }

    .nav.open ul {
        flex-direction: column;
        gap: 0;
        padding: 8px 16px 14px;
    }

    .nav.open a {
        display: block;
        padding: 13px 8px;
        border-bottom: 1px solid var(--bg);
        white-space: normal;
    }

    .nav.open li:last-child a {
        border-bottom: none;
    }

    /* 展开菜单底部动作区：仅移动端下拉里显示 */
    .nav.open .nav-mobile-actions {
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 14px 16px 18px;
        border-top: 1px solid var(--bg);
    }

    .nav.open .nav-mobile-actions .btn-outline {
        color: var(--primary);
        border-color: var(--primary);
    }

    .header {
        position: sticky;
    }

    .header-inner {
        position: relative;
    }

    .nav-toggle {
        display: flex;
    }

    /* 折叠动画期间裁剪溢出 */
    .nav.open {
        overflow: hidden;
    }

    .header-inner {
        height: 60px;
    }

    .logo a {
        font-size: 18px;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .header-cta {
        display: none;
    }
    
    .banner h1 {
        font-size: 28px;
        letter-spacing: -0.5px;
    }

    /* ===== 移动端细节优化（首页/核心功能/视频教程/价格套餐/在线客服） ===== */
    .banner {
        padding: 24px 0 32px;
    }

    .banner::before,
    .banner::after {
        display: none;
    }

    .banner-tag {
        font-size: 12px;
        padding: 6px 14px;
    }

    .banner-desc {
        font-size: 14px;
        line-height: 1.7;
    }

    .banner-buttons {
        gap: 12px;
        margin-bottom: 32px;
    }

    .banner-buttons .btn-lg {
        padding: 12px 24px;
        font-size: 14px;
    }

    .banner-stats {
        flex-wrap: wrap;
        gap: 20px 32px;
    }

    .stat-number {
        font-size: 24px;
    }

    .stat-label {
        font-size: 12px;
    }

    .video-badge {
        top: 10px;
        left: 10px;
        padding: 4px 10px;
        font-size: 12px;
    }

    .page-banner {
        padding: 24px 0;
    }

    .page-banner h1 {
        font-size: 26px;
    }

    .page-banner p {
        font-size: 14px;
    }

    .section-title {
        margin-bottom: 32px;
    }

    .section-title h2 {
        font-size: 24px;
    }

    .section-title p {
        font-size: 14px;
    }

    /* 核心功能页：分类按钮横向滚动、板块间距收紧 */
    .function-categories {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 6px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .function-categories::-webkit-scrollbar {
        display: none;
    }

    .category-item {
        flex-shrink: 0;
        padding: 9px 16px;
        font-size: 13px;
    }

    .function-block {
        padding: 36px 0;
    }

    .function-detail {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 视频教程页：分类横滚 + 卡片单列 */
    .tutorial-categories {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding: 8px 8px 10px;
        margin: -40px 0 22px;
        border-radius: 24px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .tutorial-categories::-webkit-scrollbar {
        display: none;
    }

    .tut-cat-btn {
        flex-shrink: 0;
    }

    /* 移动端隐藏横幅装饰插画 */
    .tut-hero-art {
        display: none;
    }

    .tut-hero-inner {
        grid-template-columns: 1fr;
    }

    .tut-hero {
        padding: 16px 0 24px;
    }

    .tut-hero-text h1 {
        font-size: 30px;
    }

    .tut-hero-stats {
        gap: 28px;
    }

    .tips-list {
        grid-template-columns: 1fr;
    }

    .tutorial-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    /* 视频教程分页：移动端按钮收窄，省略号隐藏 */
    .tutorial-pagination {
        margin-top: 32px;
        gap: 6px;
    }

    .tutorial-pagination .page-btn {
        width: 34px;
        height: 34px;
        font-size: 13px;
    }

    .tutorial-pagination .page-ellipsis {
        display: none;
    }

    /* 价格套餐页：购买流程纵向排列 */
    .process-steps {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }

    .step-arrow {
        display: none;
    }

    .price-section,
    .license-section,
    .purchase-methods,
    .notice-section {
        padding: 24px 0;
    }

    /* 在线客服页 */
    .service-section {
        padding: 24px 0;
    }

    .service-actions {
        flex-direction: column;
    }

    .service-actions .btn {
        width: 100%;
    }

    /* 首页 FAQ 预览区块间距收紧 */
    .faq-preview {
        padding: 24px 0;
    }

    /* 移动端：Banner 由左右结构改为上下堆叠，视频在文案之后 */
    .banner-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .banner-content {
        text-align: left;
    }

    .banner-tag {
        display: inline-flex;
    }

    .banner-desc {
        max-width: 100%;
    }

    .banner-buttons,
    .banner-stats {
        justify-content: flex-start;
    }

    .video-glow {
        display: none;
    }

    .pain-grid,
    .testimonial-grid,
    .case-grid,
    .feature-grid,
    .screenshot-grid,
    .tutorial-grid,
    .req-grid,
    .license-grid,
    .values-grid,
    .team-grid,
    .methods-grid,
    .price-grid,
    .price-grid-large {
        grid-template-columns: 1fr;
    }

    /* ≤768px：三档套餐改为纵向堆叠，卡片回到宽松排版 */
    .price-grid-large .price-card-large {
        padding: 32px 26px;
    }

    .price-grid-large .price-card-header h3 {
        font-size: 22px;
    }

    .price-grid-large .price-card-header p {
        font-size: 14px;
    }

    .price-grid-large .price-card-price {
        margin: 24px 0;
    }

    .price-grid-large .price-card-price .amount {
        font-size: 44px;
    }

    .price-grid-large .price-card-features li {
        padding: 11px 0;
        font-size: 14px;
    }

    .stats-grid,
    .install-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .trial-highlights {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: 12px;
        padding-left: 40px;
    }
    
    .timeline-year {
        text-align: left;
        width: auto;
    }
    
    .timeline-content::before {
        left: -36px;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }

    /* 手机版隐藏站点底部（footer 链接区与版权栏） */
    .footer {
        display: none;
    }

    .float-service {
        right: 10px;
        top: auto;
        bottom: 90px;
        transform: none;
    }

    /* 移动端：窄面板改为向上弹出（贴右下角，向左上展开） */
    .float-panel {
        right: calc(100% + 10px);
        top: auto;
        bottom: 0;
        transform: translateX(10px);
        width: 172px;
    }

    .float-service.open .float-panel {
        transform: translateX(0);
    }

    .float-item {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
    
    .player-placeholder {
        height: 280px;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* FAQ 详细页面样式 */
.faq-detail-section {
    padding: 32px 0;
    background: var(--bg-white);
}

.faq-list-detailed {
    max-width: 900px;
    margin: 0 auto 60px;
}

.faq-item-detailed {
    display: flex;
    gap: 0;
    padding: 24px 28px;
    margin-bottom: 16px;
    background: #e3f2fd;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.faq-item-detailed:hover {
    background: #bbdefb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.15);
}

.faq-item-detailed:last-child {
    margin-bottom: 0;
}

.faq-content-detailed {
    flex: 1;
}

.faq-question-detailed {
    display: flex;
    gap: 0;
    align-items: flex-start;
    margin-bottom: 12px;
}

.faq-question-detailed h3 {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: #1565c0;
    line-height: 1.6;
    margin: 0;
    flex: 1;
}

.faq-num-text {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: #1976d2;
    margin-right: 0;
    flex-shrink: 0;
}

.faq-answer-detailed {
    margin-bottom: 0;
}

.faq-answer-detailed p {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 16px;
    color: #424242;
    line-height: 1.8;
    margin: 0;
    padding-left: 24px;
}

.faq-cta-box {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-lg);
    color: white;
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
}

.faq-cta-box h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.faq-cta-box p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.faq-cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .faq-item-detailed {
        padding: 20px 0;
    }

    .faq-num-text {
        font-size: 20px;
    }

    .faq-question-detailed h3 {
        font-size: 20px;
    }

    .faq-answer-detailed p {
        font-size: 18px;
        padding-left: 0;
    }

    .faq-cta-box {
        padding: 40px 24px;
    }

    .faq-cta-box h2 {
        font-size: 24px;
    }

    .faq-cta-buttons {
        flex-direction: column;
    }
}