/* ========================================
   Rufus 官网共享样式表
   亮色主题 · 科技灰靛蓝 · 响应式
   ======================================== */

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #5865F2;
    --primary-dark: #4752C4;
    --secondary: #6D7FBD;
    --accent: #A5B4FC;
    --accent-light: #EEF1FF;
    --bg: #FFFFFF;
    --bg-soft: #F5F6FA;
    --bg-card: #FFFFFF;
    --text: #1e2130;
    --text-light: #5a6070;
    --text-muted: #8e94a0;
    --border: #E3E5EC;
    --border-strong: #CDD0D9;
    --shadow-sm: 0 2px 8px rgba(88, 101, 242, 0.06);
    --shadow-md: 0 8px 30px rgba(88, 101, 242, 0.10);
    --shadow-lg: 0 20px 60px rgba(88, 101, 242, 0.12);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --max-width: 1200px;
    --gradient-primary: linear-gradient(135deg, #5865F2 0%, #818CF8 100%);
    --gradient-soft: linear-gradient(135deg, #F5F6FA 0%, #EEF1FF 100%);
    --gradient-hero: linear-gradient(160deg, #F5F6FA 0%, #FFFFFF 50%, #EEF1FF 100%);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ===== Layout Container ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

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

.section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 48px;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--accent-light);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

/* ===== Navigation ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s ease;
}

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

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
}

.nav-logo .logo-icon {
    width: 38px;
    height: 38px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 4px 12px rgba(88, 101, 242, 0.3);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    transition: all 0.2s ease;
}

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

.nav-links a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-cta {
    padding: 8px 22px !important;
    background: var(--gradient-primary) !important;
    color: #fff !important;
    border-radius: 10px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 14px rgba(88, 101, 242, 0.35);
    transition: transform 0.2s, box-shadow 0.2s !important;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(88, 101, 242, 0.45) !important;
    background: var(--gradient-primary) !important;
}

.nav-toggle {
    display: none;
    font-size: 1.6rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text);
    padding: 4px 8px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 6px 20px rgba(88, 101, 242, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(88, 101, 242, 0.45);
}

.btn-secondary {
    background: #fff;
    color: var(--text);
    border: 2px solid var(--border-strong);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.15rem;
}

/* ===== Hero Section ===== */
.hero {
    background: var(--gradient-hero);
    padding: 60px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -120px;
    right: -120px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(165, 180, 252, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(88, 101, 242, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--border-strong);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 18px;
    color: var(--text);
}

.hero-title .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 520px;
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.hero-meta {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* ===== Hero Screenshot / Real Image Area ===== */
.hero-screenshot {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
}

.hero-screenshot .real-screenshot-frame {
    background: transparent;
    border-radius: var(--radius-sm);
    border: none;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(30, 33, 48, 0.12), 0 2px 8px rgba(30, 33, 48, 0.06);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.3s;
}

.hero-screenshot .real-screenshot-frame:hover {
    box-shadow: 0 24px 56px rgba(88, 101, 242, 0.15);
}

.hero-screenshot .real-screenshot-frame img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    object-fit: contain;
}

.mock-window {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(30, 33, 48, 0.12), 0 2px 8px rgba(30, 33, 48, 0.06);
    overflow: hidden;
    border: 1px solid var(--border);
}

.mock-titlebar {
    background: #2d3142;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mock-titlebar .mock-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.mock-titlebar .mock-dot.red { background: #ff5f57; }
.mock-titlebar .mock-dot.yellow { background: #febc2e; }
.mock-titlebar .mock-dot.green { background: #28c840; }

.mock-titlebar .mock-title {
    color: #fff;
    font-size: 0.75rem;
    margin-left: 10px;
    opacity: 0.85;
    font-weight: 500;
}

.mock-body {
    padding: 16px 18px 20px;
}

.mock-row {
    margin-bottom: 14px;
}

.mock-row label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mock-select {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.78rem;
    color: var(--text);
    position: relative;
    cursor: default;
}

.mock-select::after {
    content: "▾";
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.7rem;
}

.mock-row-half {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.mock-row select,
.mock-row .mock-select {
    width: 100%;
}

.mock-progress {
    margin-top: 10px;
    margin-bottom: 16px;
}

.mock-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin-bottom: 6px;
    position: relative;
    overflow: hidden;
}

.mock-bar::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 18%;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: mockProgress 3s ease-in-out infinite;
}

@keyframes mockProgress {
    0%, 100% { width: 5%; }
    50% { width: 25%; }
}

.mock-progress span {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.mock-btn {
    background: var(--gradient-primary);
    color: #fff;
    text-align: center;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: default;
    box-shadow: 0 4px 12px rgba(88, 101, 242, 0.3);
    transition: box-shadow 0.3s;
}

.mock-window:hover .mock-btn {
    box-shadow: 0 6px 20px rgba(88, 101, 242, 0.45);
}

/* ===== Stats Bar ===== */
.stats-bar {
    background: #fff;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 40px 0;
}

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

.stat-item .stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.stat-item .stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 36px 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

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

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 18px;
    display: inline-block;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== Steps Section ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    counter-reset: step;
}

.step-card {
    text-align: center;
    padding: 40px 28px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    position: relative;
    transition: all 0.3s ease;
}

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

.step-number {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 800;
    margin: 0 auto 20px;
    box-shadow: 0 6px 18px rgba(88, 101, 242, 0.3);
}

.step-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ===== Supported Systems ===== */
.systems-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.system-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.system-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-3px);
}

.system-card .sys-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.system-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.system-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== FAQ Accordion ===== */
.faq-list {
    max-width: 760px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.faq-item.open {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: color 0.2s;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question .faq-icon {
    font-size: 1.3rem;
    color: var(--primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    max-height: 400px;
    padding: 0 24px 20px;
}

.faq-answer p {
    margin-bottom: 8px;
}

.faq-answer code {
    background: var(--bg-soft);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.88rem;
    color: var(--primary);
}

/* ===== Page Header (sub-pages) ===== */
.page-header {
    background: var(--gradient-hero);
    padding: 60px 0 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: "";
    position: absolute;
    top: -60px;
    right: -60px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(165, 180, 252, 0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.page-header h1 {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 560px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.breadcrumb a {
    color: var(--primary);
    font-weight: 500;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ===== Feature Detail Section (features.html) ===== */
.feature-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    margin-bottom: 80px;
}

.feature-detail:nth-child(even) .feature-detail-content {
    order: 2;
}

.feature-detail-content .section-tag {
    margin-bottom: 16px;
}

.feature-detail-content h2 {
    font-size: 1.9rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.feature-detail-content p {
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.8;
}

.feature-detail-content ul {
    margin: 16px 0;
}

.feature-detail-content ul li {
    padding: 6px 0 6px 28px;
    position: relative;
    color: var(--text-light);
}

.feature-detail-content ul li::before {
    content: "✅";
    position: absolute;
    left: 0;
}

.feature-detail-visual {
    background: var(--gradient-soft);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    border: 1px solid var(--border);
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.feature-detail-visual .visual-emoji {
    font-size: 5rem;
    margin-bottom: 16px;
}

.feature-detail-visual .visual-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

.feature-detail-visual .visual-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ===== Comparison Table ===== */
.comparison-wrap {
    max-width: 820px;
    margin: 0 auto;
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-width: 600px;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.comparison-table th {
    background: var(--bg-soft);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    font-size: 0.92rem;
    color: var(--text-light);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table .yes {
    color: #22c55e;
    font-weight: 700;
    font-size: 1.1rem;
}

.comparison-table .no {
    color: #ef4444;
    font-weight: 700;
    font-size: 1.1rem;
}

.comparison-table .highlight-col {
    background: var(--accent-light);
}

/* ===== Tech Specs ===== */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 820px;
    margin: 0 auto;
}

.spec-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 24px 28px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: all 0.2s ease;
}

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

.spec-item .spec-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.spec-item .spec-content h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.spec-item .spec-content p {
    font-size: 0.88rem;
    color: var(--text-light);
}

/* ===== Troubleshooting Guide ===== */
.trouble-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.trouble-card {
    background: #fff;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 24px 28px;
    transition: all 0.2s ease;
}

.trouble-card:hover {
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.trouble-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.trouble-card h4 .trouble-emoji {
    margin-right: 8px;
}

.trouble-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

.trouble-card .trouble-solution {
    margin-top: 10px;
    padding: 10px 14px;
    background: var(--bg-soft);
    border-radius: 8px;
    font-size: 0.88rem;
    color: var(--text);
}

.trouble-card .trouble-solution strong {
    color: var(--primary);
}

/* ===== Use Cases ===== */
.usecase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.usecase-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 26px;
    transition: all 0.3s ease;
}

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

.usecase-card .uc-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
}

.usecase-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.usecase-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== Call to Action ===== */
.cta-section {
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    position: relative;
    overflow: hidden;
    color: #fff;
}

.cta-section::before {
    content: "🚀";
    position: absolute;
    font-size: 7rem;
    top: -10px;
    right: 10px;
    opacity: 0.08;
    transform: rotate(-15deg);
}

.cta-section::after {
    content: "💾";
    position: absolute;
    font-size: 5rem;
    bottom: -5px;
    left: 20px;
    opacity: 0.08;
    transform: rotate(15deg);
}

.cta-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: center;
}

.cta-text {
    text-align: left;
}

.cta-text h2 {
    font-size: 1.9rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: #fff;
}

.cta-text p {
    font-size: 1.05rem;
    opacity: 0.9;
    margin-bottom: 28px;
    color: #fff;
}

.cta-text .btn {
    background: #fff;
    color: var(--primary);
    display: inline-flex;
}

.cta-text .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* CTA 区域内的虚拟截图 — 放大版 */
.cta-mock {
    display: flex;
    justify-content: center;
}

.mock-cta {
    width: 100%;
    max-width: 340px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25), 0 4px 10px rgba(0, 0, 0, 0.15) !important;
    transform: scale(1.02);
}

.mock-cta .mock-body {
    padding: 14px 16px 18px;
}

.mock-cta .mock-row {
    margin-bottom: 12px;
}

.mock-cta .mock-row label {
    font-size: 0.68rem;
    margin-bottom: 4px;
}

.mock-cta .mock-select {
    font-size: 0.75rem;
    padding: 7px 11px;
}

.mock-cta .mock-row-half {
    gap: 10px;
}

.mock-cta .mock-progress {
    margin-top: 8px;
    margin-bottom: 14px;
}

.mock-cta .mock-progress span {
    font-size: 0.68rem;
}

.mock-cta .mock-btn {
    padding: 9px;
    font-size: 0.82rem;
}

.mock-cta .mock-titlebar {
    padding: 8px 14px;
}

.mock-cta .mock-titlebar .mock-dot {
    width: 10px;
    height: 10px;
}

.mock-cta .mock-titlebar .mock-title {
    font-size: 0.72rem;
}

/* ===== Footer ===== */
.footer {
    background: #1a1a2e;
    color: #c4c4c4;
    padding: 60px 0 30px;
}

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

.footer-brand .nav-logo {
    color: #fff;
    margin-bottom: 14px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: #888;
    max-width: 300px;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.footer-col ul li a {
    font-size: 0.9rem;
    color: #888;
    transition: color 0.2s;
}

.footer-col ul li a:hover {
    color: var(--secondary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: #666;
}

.footer-bottom .footer-links {
    display: flex;
    gap: 20px;
}

.footer-bottom .footer-links a {
    font-size: 0.85rem;
    color: #888;
}

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

/* ===== Download Box ===== */
.download-box {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.download-box .dl-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}

.download-box h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.download-box .dl-version {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.download-box .dl-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-box .dl-info {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.download-box .dl-info span {
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== Responsive ===== */
/* 平板 */
@media (max-width: 968px) {
    .hero-inner {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        order: 1;
    }

    .hero-screenshot {
        order: 2;
        max-width: 440px;
        margin: 0 auto;
    }

    .hero-screenshot .real-screenshot-frame {
        min-height: 240px;
    }

    .hero-screenshot .real-screenshot-placeholder {
        padding: 32px 20px;
        font-size: 0.82rem;
    }

    .hero-screenshot .real-screenshot-placeholder .ph-icon {
        font-size: 2rem;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-meta {
        justify-content: center;
    }
    .features-grid,
    .steps-grid,
    .usecase-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .feature-detail {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .feature-detail:nth-child(even) .feature-detail-content {
        order: 0;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .trouble-grid,
    .specs-grid {
        grid-template-columns: 1fr;
    }

    .cta-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .cta-mock {
        order: -1;
        margin-bottom: 12px;
    }

    .mock-cta {
        transform: scale(0.88);
    }
}

/* 移动端 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        padding: 12px 18px;
    }

    .nav-toggle {
        display: block;
    }

    .section {
        padding: 56px 0;
    }

    .hero {
        padding: 56px 16px 72px;
    }

    .hero-title {
        font-size: 2.4rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

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

    .hero-meta {
        gap: 16px;
        flex-direction: column;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .features-grid,
    .steps-grid,
    .usecase-grid,
    .systems-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .cta-section {
        padding: 40px 24px;
    }

    .cta-text h2 {
        font-size: 1.6rem;
    }

    .mock-cta {
        transform: scale(0.75);
    }

    .page-header h1 {
        font-size: 2.2rem;
    }

    .download-box {
        padding: 32px 24px;
    }

    .container {
        padding: 0 20px;
    }
}