/* ====== 全局变量 ====== */
:root {
    --primary: #00b894;
    --primary-dark: #00a381;
    --primary-light: #e0f7f4;
    --primary-lighter: #f0faf8;
    --accent: #fdcb6e;
    --accent-dark: #f0b849;
    --text-dark: #1a1a2e;
    --text-body: #444;
    --text-gray: #777;
    --text-light: #aaa;
    --bg-white: #ffffff;
    --bg-light: #f8f9fc;
    --bg-gray: #f5f6fa;
    --border: #e8e8e8;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-body);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ====== 通用容器 ====== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--bg-gray);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
}

/* ====== 按钮 ====== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(0, 184, 148, 0.35);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 184, 148, 0.45);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

.btn-white {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

/* ====== 导航栏 ====== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    display: flex;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

.nav-badge {
    font-size: 11px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-body);
    font-weight: 500;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ====== Hero 区域 ====== */
.hero {
    position: relative;
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f0faf8 0%, #e8f5f1 50%, #f8f9fc 100%);
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

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

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    bottom: -80px;
    left: -80px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--primary);
    top: 40%;
    left: 50%;
}

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

.hero-content {
    max-width: 560px;
}

.hero-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 20px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), #55efc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 20px;
}

.hero-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.hero-keywords span {
    font-size: 12px;
    color: var(--primary-dark);
    background: var(--primary-light);
    padding: 3px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.hero-tags span {
    font-size: 12px;
    color: var(--text-gray);
    background: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 0;
    background: #fff;
    border-radius: var(--radius-md);
    padding: 20px 28px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 32px;
}

.stat-item {
    flex: 1;
    text-align: center;
}

.stat-label {
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
}

.stat-value.star {
    color: var(--accent-dark);
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* Hero 视觉区 */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    position: relative;
}

.qr-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    z-index: 2;
}

.qr-code {
    width: 180px;
    height: 180px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

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

.qr-subtext {
    font-size: 12px;
    color: var(--text-gray);
}

/* 手机模拟 */
.phone-mockup {
    position: relative;
    z-index: 1;
}

.phone-frame {
    width: 240px;
    height: 480px;
    background: #1a1a2e;
    border-radius: 36px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.phone-notch {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 20px;
    background: #1a1a2e;
    border-radius: 0 0 14px 14px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #f5f5f5;
    border-radius: 30px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-header {
    padding: 28px 12px 8px;
    background: #fff;
}

.app-search {
    display: flex;
    align-items: center;
    gap: 6px;
    background: #f0f0f0;
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 12px;
    color: #999;
}

.app-banner {
    margin: 10px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), #55efc4);
    border-radius: 10px;
    display: flex;
    align-items: center;
    padding: 0 14px;
}

.banner-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.banner-tag {
    font-size: 10px;
    background: rgba(255,255,255,0.3);
    color: #fff;
    padding: 2px 8px;
    border-radius: 10px;
    width: fit-content;
}

.banner-title {
    font-size: 14px;
    color: #fff;
    font-weight: 600;
}

.app-categories {
    display: flex;
    justify-content: space-around;
    padding: 8px 10px;
    background: #fff;
    margin: 0 10px;
    border-radius: 8px;
}

.cat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    color: #666;
}

.cat-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.cat-1 { background: #fff0f0; }
.cat-2 { background: #fff0f5; }
.cat-3 { background: #f0f0ff; }
.cat-4 { background: #f0fff0; }
.cat-5 { background: #fff8f0; }

.app-section-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px 6px;
    font-size: 13px;
    font-weight: 600;
    color: #333;
}

.more {
    font-size: 11px;
    color: #999;
    font-weight: 400;
}

.app-comic-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 0 10px 10px;
}

.comic-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.comic-cover {
    height: 80px;
    border-radius: 6px 6px 0 0;
}

.cover-1 { background: linear-gradient(135deg, #ff6b6b, #ee5a24); }
.cover-2 { background: linear-gradient(135deg, #4834d4, #686de0); }
.cover-3 { background: linear-gradient(135deg, #f0932b, #ffbe76); }
.cover-4 { background: linear-gradient(135deg, #6ab04c, #badc58); }

.comic-info {
    padding: 4px 6px;
}

.comic-name {
    font-size: 11px;
    font-weight: 600;
    color: #333;
}

.comic-tag {
    font-size: 9px;
    color: #999;
    margin-top: 2px;
}

.phone-label {
    text-align: center;
    font-size: 13px;
    color: var(--text-gray);
    margin-top: 16px;
}

/* ====== 功能特色 ====== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: #fff;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(-5deg);
}

.icon-green { background: linear-gradient(135deg, #00b894, #55efc4); }
.icon-blue { background: linear-gradient(135deg, #0984e3, #74b9ff); }
.icon-orange { background: linear-gradient(135deg, #e17055, #fdcb6e); }
.icon-purple { background: linear-gradient(135deg, #6c5ce7, #a29bfe); }
.icon-dark { background: linear-gradient(135deg, #2d3436, #636e72); }
.icon-teal { background: linear-gradient(135deg, #00cec9, #81ecec); }

.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

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

/* ====== 文章区域 ====== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.article-card {
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.article-img {
    height: 180px;
    position: relative;
    display: flex;
    align-items: flex-end;
    padding: 16px;
}

.img-1 { background: linear-gradient(135deg, #00b894, #55efc4); }
.img-2 { background: linear-gradient(135deg, #0984e3, #74b9ff); }
.img-3 { background: linear-gradient(135deg, #6c5ce7, #a29bfe); }
.img-4 { background: linear-gradient(135deg, #2d3436, #636e72); }
.img-5 { background: linear-gradient(135deg, #e17055, #fdcb6e); }
.img-6 { background: linear-gradient(135deg, #00cec9, #81ecec); }

.article-img::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.05);
}

.article-cat {
    position: relative;
    z-index: 1;
    font-size: 12px;
    color: #fff;
    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(4px);
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 500;
}

.article-body {
    padding: 20px;
}

.article-body h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card:hover .article-body h3 {
    color: var(--primary);
}

.article-body p {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

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

.article-link {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

.article-link:hover {
    color: var(--primary-dark);
}

/* ====== 软件介绍 ====== */
.software-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.software-panel {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.software-panel:hover {
    box-shadow: var(--shadow-md);
}

.software-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), #55efc4);
    border-radius: 4px 0 0 4px;
}

.panel-number {
    position: absolute;
    top: 20px;
    right: 28px;
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
}

.software-panel h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.software-panel p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.software-panel p strong {
    color: var(--primary-dark);
}

/* ====== 安装教程 ====== */
.install-steps {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 0;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
    max-width: 360px;
    position: relative;
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #55efc4);
    color: #fff;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(0, 184, 148, 0.3);
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.step-content p {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
}

.step-arrow {
    font-size: 24px;
    color: var(--primary-light);
    margin: 0 20px;
}

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

/* ====== 常见问题 ====== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
}

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

.faq-question {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    user-select: none;
}

.faq-q-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-question > span:nth-child(2) {
    flex: 1;
}

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

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px 0 64px;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-bottom: 18px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.8;
}

/* ====== 搜索标签 ====== */
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
}

.tags-cloud a {
    font-size: 13px;
    color: var(--text-body);
    background: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.tags-cloud a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* ====== 用户评价 ====== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.review-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.review-stars {
    color: var(--accent-dark);
    font-size: 16px;
    letter-spacing: 2px;
    margin-bottom: 14px;
}

.review-card p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
}

.avatar-1 { background: linear-gradient(135deg, #00b894, #55efc4); }
.avatar-2 { background: linear-gradient(135deg, #0984e3, #74b9ff); }
.avatar-3 { background: linear-gradient(135deg, #6c5ce7, #a29bfe); }
.avatar-4 { background: linear-gradient(135deg, #e17055, #fdcb6e); }
.avatar-5 { background: linear-gradient(135deg, #00cec9, #81ecec); }
.avatar-6 { background: linear-gradient(135deg, #fd79a8, #fab1a0); }

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

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

/* ====== CTA Banner ====== */
.cta-banner {
    background: linear-gradient(135deg, var(--primary) 0%, #55efc4 100%);
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 30px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 16px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 28px;
}

/* ====== 页脚 ====== */
.footer {
    background: #1a1a2e;
    color: #b8b8c8;
    padding: 60px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-logo img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 50%;
}

.footer-logo span {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
}

.footer-slogan {
    font-size: 14px;
    color: #888;
}

.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: #b8b8c8;
    margin-bottom: 10px;
}

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

.footer-contact p {
    font-size: 14px;
    margin-bottom: 10px;
}

.footer-download {
    display: flex;
    align-items: flex-start;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #888;
    margin-bottom: 6px;
}

.footer-disclaimer {
    font-size: 12px !important;
    color: #666 !important;
}

/* ====== 返回顶部 ====== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(0, 184, 148, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ====== AOS 动画模拟 ====== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* ====== 响应式 ====== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-keywords,
    .hero-tags {
        justify-content: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-visual {
        margin-top: 20px;
    }

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

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

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        gap: 0;
        padding: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu li {
        padding: 12px 0;
        border-bottom: 1px solid var(--border);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-badge {
        display: none;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 30px;
    }

    .hero-visual {
        flex-direction: column;
        gap: 20px;
    }

    .phone-frame {
        width: 200px;
        height: 400px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
        padding: 16px;
    }

    .stat-item {
        min-width: 40%;
    }

    .stat-divider {
        display: none;
    }

    .features-grid,
    .articles-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }

    .install-steps {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }

    .step-item {
        width: 100%;
        max-width: 400px;
    }

    .step-arrow {
        transform: rotate(90deg);
        margin: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .cta-content h2 {
        font-size: 22px;
    }

    .cta-content p {
        font-size: 14px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 24px;
    }

    .section-title {
        font-size: 22px;
    }

    .feature-card,
    .software-panel {
        padding: 24px 20px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 12px;
    }

    .stat-item {
        width: 100%;
    }

    .panel-number {
        font-size: 36px;
    }
}