/* ============================================
   FakeLocation - 样式表
   配色基于 Logo 青绿色 (Teal)
   主色: #0D9488 / 渐变 #0D9488 → #14B8A6
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --primary: #0D9488;
    --primary-deep: #0F766E;
    --primary-dark: #064E45;
    --primary-light: #14B8A6;
    --primary-lighter: #2DD4BF;
    --primary-bg: #F0FDFA;
    --primary-bg-dark: #042F2E;

    --gradient: linear-gradient(135deg, #0D9488 0%, #14B8A6 100%);
    --gradient-dark: linear-gradient(135deg, #0F766E 0%, #0D9488 100%);
    --gradient-soft: linear-gradient(135deg, rgba(13,148,136,.12) 0%, rgba(20,184,166,.06) 100%);

    --text: #1F2937;
    --text-soft: #4B5563;
    --text-muted: #9CA3AF;
    --text-inverse: #FFFFFF;

    --bg: #FFFFFF;
    --bg-alt: #F8FAFB;
    --bg-dark: #042F2E;

    --border: #E5E7EB;
    --border-light: #F3F4F6;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 16px rgba(13,148,136,.08), 0 2px 6px rgba(0,0,0,.04);
    --shadow-lg: 0 16px 48px rgba(13,148,136,.15), 0 4px 12px rgba(0,0,0,.06);
    --shadow-xl: 0 24px 64px rgba(13,148,136,.25), 0 8px 20px rgba(0,0,0,.1);

    --trans: all .3s cubic-bezier(.4,0,.2,1);
    --trans-slow: all .5s cubic-bezier(.4,0,.2,1);

    --nav-h: 72px;
    --container: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

button { font-family: inherit; cursor: pointer; border: none; background: none; }

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

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

/* ---------- 顶部导航 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    background: rgba(255,255,255,.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--trans);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
    background: rgba(255,255,255,.95);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    height: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--gradient);
    padding: 4px;
    display: block;
}

.nav-title { letter-spacing: -.02em; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: .95rem;
    font-weight: 500;
    color: var(--text-soft);
    position: relative;
}

.nav-links a:not(.nav-download-btn)::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
    transition: width .3s ease;
}

.nav-links a:not(.nav-download-btn):hover::after { width: 100%; }
.nav-links a:not(.nav-download-btn):hover { color: var(--primary); }

.nav-download-btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    background: var(--gradient);
    color: #fff !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(13,148,136,.25);
    transition: var(--trans);
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13,148,136,.4);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--trans);
}

.hamburger.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- Hero 首屏 ---------- */
.hero {
    position: relative;
    padding: calc(var(--nav-h) + 64px) 0 80px;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(13,148,136,.15) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 20%, rgba(20,184,166,.1) 0%, transparent 50%),
        var(--bg);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(13,148,136,.08) 1px, transparent 0);
    background-size: 32px 32px;
    opacity: .5;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, #000 40%, transparent 75%);
}

.hero-container {
    position: relative;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(13,148,136,.08);
    border: 1px solid rgba(13,148,136,.15);
    border-radius: var(--radius-full);
    font-size: .85rem;
    font-weight: 500;
    color: var(--primary-deep);
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(13,148,136,.5); }
    50% { box-shadow: 0 0 0 6px rgba(13,148,136,0); }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -.03em;
    margin-bottom: 24px;
    color: var(--text);
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-soft);
    line-height: 1.75;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: 0;
    background: rgba(13,148,136,.04);
    border: 1px solid rgba(13,148,136,.1);
    border-radius: var(--radius-lg);
    padding: 18px 28px;
    margin-bottom: 36px;
}

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

.meta-label {
    display: block;
    font-size: .75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: 4px;
}

.meta-value {
    display: block;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
}

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

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--trans);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 8px 24px rgba(13,148,136,.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(13,148,136,.45);
    color: #fff;
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

.btn-lg { padding: 18px 40px; font-size: 1.05rem; }
.btn-xl { padding: 22px 56px; font-size: 1.15rem; }

/* ---------- 首屏统计 ---------- */
.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -.02em;
    line-height: 1;
}

.stat-plus {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: .8rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: .02em;
}

/* ---------- 截图展示 ---------- */
.hero-showcase {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.screenshot-stack {
    position: relative;
    width: 320px;
    height: 640px;
}

.screenshot-card {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    height: 580px;
    background: #fff;
    border-radius: 32px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: transform .5s cubic-bezier(.4,0,.2,1), opacity .4s ease;
    cursor: pointer;
    border: 1px solid rgba(0,0,0,.06);
}

.screenshot-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 24px;
    background: rgba(0,0,0,.85);
    border-radius: 0 0 16px 16px;
    z-index: 2;
}

.screenshot-card .screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: var(--primary-bg);
}

.screenshot-label {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: rgba(4,47,69,.85);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: .75rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    z-index: 2;
}

/* 默认堆叠位置 */
.card-1 { transform: translateX(-50%) rotate(-8deg) translateX(-40px) scale(.88); opacity: .7; z-index: 1; }
.card-2 { transform: translateX(-50%) rotate(0deg) translateX(0) scale(1); opacity: 1; z-index: 3; }
.card-3 { transform: translateX(-50%) rotate(8deg) translateX(40px) scale(.88); opacity: .7; z-index: 1; }

/* 悬停/激活时：放大居中 + 提亮 */
.screenshot-card.active {
    transform: translateX(-50%) rotate(0deg) scale(1) translateX(0) !important;
    opacity: 1 !important;
    z-index: 4 !important;
    box-shadow: 0 32px 80px rgba(13,148,136,.35);
}

.screenshot-card:not(.active) {
    filter: grayscale(30%) brightness(.9);
}

.screenshot-hint {
    font-size: .85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.hint-arrow {
    padding: 4px 10px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: .75rem;
}

/* ---------- 通用 Section ---------- */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-soft);
    color: var(--primary-deep);
    border-radius: var(--radius-full);
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -.02em;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 16px;
}

.section-sub {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* ---------- 功能亮点 ---------- */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 36px;
    background: var(--bg-alt);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    transition: var(--trans);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    background: #fff;
    border-color: transparent;
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--gradient-soft);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--trans);
}

.feature-icon svg { width: 28px; height: 28px; }

.feature-card:hover .feature-icon {
    background: var(--gradient);
    color: #fff;
    transform: scale(1.08) rotate(-3deg);
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-card p {
    color: var(--text-soft);
    font-size: .95rem;
    line-height: 1.7;
}

/* ---------- 优势对比 ---------- */
.advantages {
    padding: 100px 0;
    background: var(--bg-alt);
}

.compare-wrap {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
}

.compare-table th,
.compare-table td {
    padding: 20px 28px;
    text-align: left;
    font-size: .95rem;
    border-bottom: 1px solid var(--border-light);
}

.compare-table thead th {
    font-weight: 700;
    font-size: .9rem;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.th-feature { color: var(--text-muted); width: 30%; }
.th-fakeloc {
    background: var(--gradient);
    color: #fff;
    width: 35%;
}
.th-other {
    background: var(--bg-alt);
    color: var(--text-muted);
    width: 35%;
}

.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody tr:hover td { background: rgba(13,148,136,.02); }

.tag-good {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(13,148,136,.08);
    color: var(--primary-deep);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: .85rem;
}

.tag-bad {
    display: inline-block;
    padding: 4px 12px;
    background: #F3F4F6;
    color: var(--text-muted);
    border-radius: var(--radius-full);
    font-size: .85rem;
}

/* ---------- 适用场景 ---------- */
.scenes {
    padding: 100px 0;
    background: var(--bg);
}

.scenes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
}

.scene-card {
    padding: 40px 32px;
    border-radius: var(--radius-xl);
    background: var(--primary-bg);
    border: 1px solid rgba(13,148,136,.1);
    transition: var(--trans);
    position: relative;
    overflow: hidden;
}

.scene-card:hover {
    transform: translateY(-6px);
    background: #fff;
    box-shadow: var(--shadow-lg);
}

.scene-num {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: .25;
    line-height: 1;
    margin-bottom: 12px;
}

.scene-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.scene-card p {
    font-size: .95rem;
    color: var(--text-soft);
    line-height: 1.7;
}

/* ---------- 用户评价 ---------- */
.reviews {
    padding: 100px 0;
    background: var(--bg-alt);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.review-card {
    padding: 36px;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--trans);
    border: 1px solid var(--border-light);
}

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

.stars {
    color: #F59E0B;
    font-size: 1.1rem;
    letter-spacing: .1em;
    margin-bottom: 16px;
}

.review-text {
    color: var(--text-soft);
    font-size: .95rem;
    line-height: 1.75;
    margin-bottom: 24px;
    font-style: italic;
}

.reviewer {
    display: flex;
    align-items: center;
    gap: 14px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient);
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.reviewer-info {
    display: flex;
    flex-direction: column;
}

.reviewer-name {
    font-weight: 600;
    color: var(--text);
    font-size: .95rem;
}

.reviewer-role {
    font-size: .8rem;
    color: var(--text-muted);
}

/* ---------- FAQ ---------- */
.faq {
    padding: 100px 0;
    background: var(--bg);
}

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

.faq-item {
    border-bottom: 1px solid var(--border);
}

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

.faq-question {
    width: 100%;
    padding: 24px 8px;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    transition: var(--trans);
}

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

.faq-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 50%;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 400;
    transition: transform .3s ease;
}

.faq-item.active .faq-icon {
    background: var(--gradient);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s cubic-bezier(.4,0,.2,1), padding .3s ease;
}

.faq-item.active .faq-answer {
    max-height: 400px;
    padding-bottom: 24px;
}

.faq-answer p {
    color: var(--text-soft);
    font-size: .95rem;
    line-height: 1.8;
    padding: 0 8px;
}

/* ---------- 下载 CTA ---------- */
.download-cta {
    position: relative;
    padding: 120px 0;
    background: var(--bg-dark);
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(13,148,136,.35) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, rgba(20,184,166,.25) 0%, transparent 50%),
        var(--bg-dark);
}

.download-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(20,184,166,.15) 1px, transparent 0);
    background-size: 40px 40px;
    opacity: .5;
}

.download-inner {
    position: relative;
    text-align: center;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.download-logo-wrap {
    margin-bottom: 28px;
}

.download-logo {
    width: 88px;
    height: 88px;
    border-radius: 20px;
    background: var(--gradient);
    padding: 8px;
    box-shadow: 0 12px 40px rgba(20,184,166,.4);
}

.download-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -.02em;
    margin-bottom: 16px;
    color: #fff;
}

.download-desc {
    font-size: 1.05rem;
    color: rgba(255,255,255,.7);
    margin-bottom: 40px;
}

.download-info {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 48px;
}

.info-chip {
    display: flex;
    flex-direction: column;
    padding: 12px 24px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    min-width: 110px;
}

.chip-label {
    font-size: .7rem;
    color: rgba(255,255,255,.5);
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: 4px;
}

.chip-value {
    font-size: .95rem;
    font-weight: 700;
    color: #fff;
}

.download-cta .btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 12px 40px rgba(20,184,166,.5);
    animation: glow 2.5s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 12px 40px rgba(20,184,166,.5); }
    50% { box-shadow: 0 12px 56px rgba(20,184,166,.7), 0 0 40px rgba(20,184,166,.3); }
}

.download-cta .btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
}

.download-tip {
    margin-top: 20px;
    font-size: .85rem;
    color: rgba(255,255,255,.5);
}

/* ---------- 底部 ---------- */
.footer {
    padding: 48px 0 24px;
    background: #021411;
    color: rgba(255,255,255,.6);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.footer-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--gradient);
    padding: 4px;
}

.footer-info {
    display: flex;
    flex-direction: column;
}

.footer-name {
    font-weight: 700;
    color: #fff;
    font-size: 1.05rem;
}

.footer-sub {
    font-size: .8rem;
    color: rgba(255,255,255,.4);
}

.footer-links {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: .9rem;
    color: rgba(255,255,255,.6);
    position: relative;
}

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

.footer-download {
    color: var(--primary-lighter) !important;
    font-weight: 600;
}

.footer-copy {
    width: 100%;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,.08);
    font-size: .85rem;
    color: rgba(255,255,255,.35);
}

/* ---------- 返回顶部 ---------- */
.back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--gradient);
    color: #fff;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--trans);
    z-index: 999;
}

.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(13,148,136,.5);
}

/* ---------- 滚动出现动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .8s ease, transform .8s cubic-bezier(.4,0,.2,1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-meta { flex-direction: row; flex-wrap: wrap; gap: 0; }

    .screenshot-stack {
        width: 280px;
        height: 560px;
    }

    .screenshot-card {
        width: 240px;
        height: 500px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: var(--trans);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-download-btn {
        align-self: center;
        padding: 12px 32px;
    }

    .hamburger { display: flex; }

    .hero { padding-top: calc(var(--nav-h) + 40px); }

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

    .hero-meta {
        flex-direction: column;
        gap: 16px;
        padding: 24px;
    }

    .meta-divider {
        width: 60px;
        height: 1px;
    }

    .hero-stats {
        gap: 32px;
        justify-content: center;
    }

    .features, .advantages, .scenes, .reviews, .faq {
        padding: 70px 0;
    }

    .section-header { margin-bottom: 48px; }

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

    .compare-table th, .compare-table td {
        padding: 14px 16px;
        font-size: .85rem;
    }

    .download-cta { padding: 80px 0; }

    .download-info {
        gap: 10px;
    }

    .info-chip {
        min-width: calc(50% - 5px);
    }

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

    .footer-brand { justify-content: center; }
    .footer-links { justify-content: center; }

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

@media (max-width: 480px) {
    .hero { padding-bottom: 60px; }

    .hero-title { font-size: 1.85rem; }
    .hero-desc { font-size: .95rem; }

    .btn { padding: 12px 24px; font-size: .95rem; }
    .btn-lg { padding: 14px 28px; }
    .btn-xl { padding: 18px 40px; font-size: 1rem; }

    .feature-card { padding: 28px; }
    .scene-card { padding: 32px 24px; }
    .review-card { padding: 28px; }

    .screenshot-stack {
        width: 240px;
        height: 480px;
    }

    .screenshot-card {
        width: 210px;
        height: 440px;
    }

    .card-1 { transform: translateX(-50%) rotate(-6deg) translateX(-24px) scale(.85); }
    .card-3 { transform: translateX(-50%) rotate(6deg) translateX(24px) scale(.85); }

    .hero-stats { gap: 24px; }
    .stat-num { font-size: 1.5rem; }

    .download-info {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
    }

    .info-chip { width: 100%; }
}

/* ---------- 动画辅助 ---------- */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
}