/* ====== 基础重置 ====== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #1e88e5;
    --color-primary-dark: #1565c0;
    --color-primary-light: #64b5f6;
    --color-accent: #00c853;
    --color-bg: #ffffff;
    --color-bg-soft: #f5f8fc;
    --color-bg-dark: #0a1929;
    --color-text: #1a2332;
    --color-text-soft: #5a6678;
    --color-text-muted: #8893a5;
    --color-border: #e3e8ef;
    --shadow-sm: 0 2px 8px rgba(30, 136, 229, 0.08);
    --shadow-md: 0 8px 24px rgba(30, 136, 229, 0.12);
    --shadow-lg: 0 20px 60px rgba(10, 25, 41, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1200px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Microsoft YaHei", "Hiragino Sans GB", Roboto, Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-primary-dark);
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ====== 按钮 ====== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    box-shadow: 0 8px 20px rgba(30, 136, 229, 0.35);
}

.btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(30, 136, 229, 0.45);
}

.btn-ghost {
    background: rgba(30, 136, 229, 0.08);
    color: var(--color-primary);
    border: 1.5px solid rgba(30, 136, 229, 0.2);
}

.btn-ghost:hover {
    background: rgba(30, 136, 229, 0.12);
    color: var(--color-primary-dark);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 17px;
}

/* ====== 头部导航 ====== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

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

.logo-icon {
    font-size: 22px;
}

.main-nav {
    display: flex;
    gap: 8px;
}

.main-nav a {
    padding: 8px 16px;
    color: var(--color-text-soft);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-primary);
    background: rgba(30, 136, 229, 0.08);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 32px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ====== 英雄区 ====== */
.hero {
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #f5f8fc 0%, #ffffff 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(30, 136, 229, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 200, 83, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(100, 181, 246, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(30, 136, 229, 0.1);
    padding: 6px 16px;
    border-radius: 100px;
    letter-spacing: 0.5px;
}

.hero-name {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 800;
    line-height: 1.15;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary-dark) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-soft);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.stat-suffix {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ====== 演示窗口 ====== */
.hero-search-demo {
    position: relative;
    max-width: 800px;
    margin: 80px auto 0;
    padding: 0 24px;
}

.search-demo-window {
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    text-align: left;
}

.window-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #f0f4f8;
    border-bottom: 1px solid var(--color-border);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.window-title {
    margin-left: auto;
    margin-right: auto;
    font-size: 13px;
    color: var(--color-text-muted);
    font-weight: 500;
}

.window-search {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-soft);
}

.type-text {
    font-family: "Consolas", "Monaco", monospace;
    font-size: 14px;
    color: var(--color-text);
}

.cursor {
    color: var(--color-primary);
    font-weight: 100;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.window-results {
    background: #fff;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid #f0f4f8;
    font-size: 13px;
    transition: background var(--transition);
}

.result-row:last-child {
    border-bottom: none;
}

.result-row:hover {
    background: #f5f8fc;
}

.result-name {
    color: var(--color-text);
    font-family: "Consolas", "Monaco", monospace;
}

.result-path {
    color: var(--color-text-muted);
    font-size: 12px;
    font-family: "Consolas", "Monaco", monospace;
}

/* ====== 区块通用 ====== */
.section-title {
    text-align: center;
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-desc {
    text-align: center;
    font-size: 17px;
    color: var(--color-text-soft);
    margin-bottom: 56px;
}

/* ====== 功能特性 ====== */
.features {
    padding: 100px 0;
    background: var(--color-bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.animated {
    opacity: 1;
    transform: translateY(0);
}

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

.feature-icon {
    font-size: 40px;
    margin-bottom: 18px;
    display: inline-block;
    width: 64px;
    height: 64px;
    line-height: 64px;
    text-align: center;
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.1), rgba(0, 200, 83, 0.06));
    border-radius: var(--radius-md);
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--color-text-soft);
    font-size: 15px;
}

/* ====== 下载CTA ====== */
.download-cta {
    padding: 80px 0;
    background: var(--color-bg-soft);
}

.cta-card {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-text {
    flex: 1;
    min-width: 280px;
    position: relative;
    z-index: 1;
}

.cta-text h2 {
    font-size: clamp(24px, 3vw, 32px);
    margin-bottom: 8px;
    font-weight: 800;
}

.cta-text p {
    opacity: 0.9;
    font-size: 16px;
}

.cta-card .btn-primary {
    background: #fff;
    color: var(--color-primary-dark);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.cta-card .btn-primary:hover {
    color: var(--color-primary-dark);
    background: #f5f8fc;
}

/* ====== 步骤 ====== */
.how-it-works {
    padding: 100px 0;
    background: var(--color-bg);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.step {
    text-align: center;
    padding: 32px 24px;
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition);
}

.step.animated {
    opacity: 1;
    transform: translateY(0);
}

.step-num {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    line-height: 1;
}

.step h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.step p {
    color: var(--color-text-soft);
    font-size: 15px;
}

/* ====== 页脚 ====== */
.site-footer {
    background: var(--color-bg-dark);
    color: #b8c2d1;
    padding: 64px 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-logo:hover {
    color: #fff;
}

.footer-desc {
    font-size: 14px;
    color: #8893a5;
}

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

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

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

.footer-col a {
    color: #b8c2d1;
    font-size: 14px;
}

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

.footer-note {
    font-size: 13px;
    color: #8893a5;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: #8893a5;
}

/* ====== 子页面通用 ====== */
.page-hero {
    padding: 120px 0 60px;
    background: linear-gradient(180deg, #f5f8fc 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 70% 30%, rgba(30, 136, 229, 0.08), transparent 50%);
    pointer-events: none;
}

.page-hero-inner {
    position: relative;
    text-align: center;
    max-width: 760px;
    margin: 0 auto;
}

.page-hero h1 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--color-text), var(--color-primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.page-hero p {
    font-size: 18px;
    color: var(--color-text-soft);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.breadcrumb a {
    color: var(--color-text-muted);
}

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

.breadcrumb-sep {
    color: var(--color-text-muted);
}

/* ====== 下载页 ====== */
.download-section {
    padding: 80px 0;
}

.download-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 48px;
}

.version-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition);
}

.version-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.version-card.stable {
    border-color: var(--color-primary);
    border-width: 2px;
    position: relative;
}

.version-tag {
    position: absolute;
    top: -12px;
    left: 36px;
    background: var(--color-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 100px;
}

.version-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.version-num {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 24px;
}

.download-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.download-list li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--color-bg-soft);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-weight: 500;
    font-size: 15px;
    transition: all var(--transition);
    border: 1px solid transparent;
}

.download-list li a:hover {
    background: rgba(30, 136, 229, 0.08);
    border-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    transform: translateX(4px);
}

.download-list li a::after {
    content: "→";
    color: var(--color-primary);
    font-weight: 600;
}

/* ====== 版本横幅 ====== */
.version-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.08) 0%, rgba(0, 200, 83, 0.05) 100%);
    border: 1px solid rgba(30, 136, 229, 0.2);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    margin-bottom: 16px;
}

.version-banner-text {
    flex: 1;
    min-width: 280px;
}

.version-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 100px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.version-banner-text h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    margin-bottom: 6px;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.version-banner-text p {
    color: var(--color-text-soft);
    font-size: 15px;
}

.version-banner-meta {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

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

.meta-label {
    font-size: 12px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

/* ====== 网盘镜像卡片 ====== */
.mirror-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 56px;
}

.mirror-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(30px);
    display: flex;
    flex-direction: column;
}

.mirror-card.animated {
    opacity: 1;
    transform: translateY(0);
}

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

.mirror-card.recommended {
    border: 2px solid var(--color-primary);
    position: relative;
}

.mirror-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.mirror-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.mirror-icon-xunlei {
    background: linear-gradient(135deg, #1e88e5, #1565c0);
}

.mirror-icon-baidu {
    background: linear-gradient(135deg, #2196f3, #1976d2);
}

.mirror-icon-quark {
    background: linear-gradient(135deg, #7c4dff, #512da8);
}

.mirror-tag {
    background: var(--color-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 100px;
}

.mirror-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.mirror-desc {
    color: var(--color-text-soft);
    font-size: 14px;
    margin-bottom: 16px;
    min-height: 42px;
}

.mirror-pwd {
    background: var(--color-bg-soft);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 13px;
    color: var(--color-text-soft);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mirror-pwd code {
    background: #fff;
    padding: 2px 10px;
    border-radius: 4px;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 14px;
    color: var(--color-primary-dark);
    font-weight: 600;
    letter-spacing: 1px;
    border: 1px solid var(--color-border);
}

.mirror-btn {
    width: 100%;
    margin-top: auto;
}

/* ====== 信息卡片 ====== */
.download-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 48px;
}

.info-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
}

.info-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}

.info-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

.info-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.download-info {
    margin-top: 32px;
    padding: 24px;
    background: var(--color-bg-soft);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text-soft);
}

.download-info a {
    font-weight: 600;
}

.download-info p {
    margin-bottom: 8px;
}

.download-info p:last-child {
    margin-bottom: 0;
}

/* ====== FAQ 页 ====== */
.faq-section {
    padding: 80px 0;
}

.faq-wrap {
    max-width: 820px;
    margin: 0 auto;
}

.faq-category {
    margin-bottom: 48px;
}

.faq-category h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-border);
    color: var(--color-primary-dark);
}

.faq-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all var(--transition);
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    color: var(--color-text);
    transition: all var(--transition);
}

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

.faq-question .faq-toggle {
    flex-shrink: 0;
    margin-left: 16px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 20px;
    transition: transform var(--transition);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.faq-item.open .faq-answer {
    max-height: 600px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--color-text-soft);
    font-size: 15px;
    line-height: 1.7;
}

.faq-answer-inner code {
    background: var(--color-bg-soft);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 13px;
    color: var(--color-primary-dark);
}

/* ====== 功能详情页 ====== */
.features-section {
    padding: 80px 0;
}

.feature-detail-grid {
    display: grid;
    gap: 64px;
}

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

.feature-detail:nth-child(even) {
    direction: rtl;
}

.feature-detail:nth-child(even) > * {
    direction: ltr;
}

.feature-detail-content h3 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 16px;
}

.feature-detail-content p {
    color: var(--color-text-soft);
    font-size: 16px;
    margin-bottom: 16px;
}

.feature-detail-content ul {
    list-style: none;
    padding: 0;
}

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

.feature-detail-content li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
    font-size: 16px;
}

.feature-detail-visual {
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.08), rgba(0, 200, 83, 0.05));
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    font-size: 80px;
    min-height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ====== 关于页 ====== */
.about-section {
    padding: 80px 0;
}

.about-wrap {
    max-width: 820px;
    margin: 0 auto;
}

.about-wrap h2 {
    font-size: 28px;
    font-weight: 700;
    margin: 32px 0 16px;
    color: var(--color-text);
}

.about-wrap h2:first-of-type {
    margin-top: 0;
}

.about-wrap p {
    color: var(--color-text-soft);
    font-size: 16px;
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-wrap ul {
    margin: 0 0 16px 20px;
    color: var(--color-text-soft);
}

.about-wrap li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.about-wrap strong {
    color: var(--color-text);
}

/* ====== 响应式 ====== */
@media (max-width: 900px) {
    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }

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

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

    .feature-detail:nth-child(even) {
        direction: ltr;
    }

    .feature-detail-visual {
        order: -1;
        min-height: 180px;
        font-size: 60px;
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        gap: 0;
        padding: 8px 16px 16px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .main-nav a {
        padding: 14px 16px;
        border-radius: var(--radius-sm);
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 110px 0 60px;
    }

    .hero-stats {
        gap: 28px;
    }

    .stat-num {
        font-size: 26px;
    }

    .hero-search-demo {
        margin-top: 56px;
    }

    .cta-card {
        padding: 40px 28px;
        text-align: center;
        justify-content: center;
    }
}

@media (max-width: 560px) {
    .container {
        padding: 0 18px;
    }

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

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

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

    .window-results .result-path {
        display: none;
    }

    .features,
    .how-it-works,
    .download-cta {
        padding: 60px 0;
    }

    .section-desc {
        margin-bottom: 36px;
    }

    .version-card {
        padding: 28px 24px;
    }
}